/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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:13:49,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:13:49,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:13:49,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:13:49,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:13:49,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:13:49,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:13:49,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:13:49,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:13:49,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:13:49,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:13:49,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:13:49,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:13:49,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:13:49,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:13:49,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:13:49,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:13:49,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:13:49,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:13:49,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:13:49,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:13:49,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:13:49,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:13:49,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:13:49,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:13:49,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:13:49,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:13:49,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:13:49,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:13:49,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:13:49,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:13:49,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:13:49,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:13:49,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:13:49,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:13:49,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:13:49,584 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 22:13:49,598 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:13:49,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:13:49,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:13:49,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:13:49,600 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:13:49,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:13:49,600 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:13:49,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:13:49,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:13:49,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:13:49,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:13:49,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:13:49,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:13:49,602 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:13:49,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:13:49,602 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:13:49,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:13:49,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:13:49,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:13:49,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:13:49,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:13:49,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:13:49,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:13:49,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:13:49,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:13:49,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:13:49,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:13:49,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:13:49,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:13:49,886 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:13:49,903 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:13:49,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:13:49,910 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:13:49,910 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:13:49,911 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-06 22:13:49,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b46fe299/060cbe6605964e4cae0034fe2982ceef/FLAG52e7eb10a [2019-11-06 22:13:50,472 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:13:50,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-06 22:13:50,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b46fe299/060cbe6605964e4cae0034fe2982ceef/FLAG52e7eb10a [2019-11-06 22:13:50,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b46fe299/060cbe6605964e4cae0034fe2982ceef [2019-11-06 22:13:50,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:13:50,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:13:50,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:50,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:13:50,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:13:50,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:50" (1/1) ... [2019-11-06 22:13:50,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15619393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:50, skipping insertion in model container [2019-11-06 22:13:50,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:50" (1/1) ... [2019-11-06 22:13:50,831 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:13:50,896 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:13:51,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:51,200 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:13:51,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:51,396 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:13:51,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51 WrapperNode [2019-11-06 22:13:51,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:51,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:13:51,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:13:51,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:13:51,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51" (1/1) ... [2019-11-06 22:13:51,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51" (1/1) ... [2019-11-06 22:13:51,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51" (1/1) ... [2019-11-06 22:13:51,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51" (1/1) ... [2019-11-06 22:13:51,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51" (1/1) ... [2019-11-06 22:13:51,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51" (1/1) ... [2019-11-06 22:13:51,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51" (1/1) ... [2019-11-06 22:13:51,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:13:51,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:13:51,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:13:51,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:13:51,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51" (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 22:13:51,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:13:51,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:13:51,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:13:51,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:13:51,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-06 22:13:51,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 22:13:51,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-06 22:13:51,524 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-11-06 22:13:51,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:13:51,525 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:13:51,525 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-11-06 22:13:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-11-06 22:13:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-11-06 22:13:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-11-06 22:13:51,527 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-06 22:13:51,527 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-06 22:13:51,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:13:51,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:13:51,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:13:52,110 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:13:52,111 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-06 22:13:52,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:52 BoogieIcfgContainer [2019-11-06 22:13:52,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:13:52,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:13:52,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:13:52,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:13:52,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:13:50" (1/3) ... [2019-11-06 22:13:52,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cd88bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:52, skipping insertion in model container [2019-11-06 22:13:52,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:51" (2/3) ... [2019-11-06 22:13:52,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cd88bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:52, skipping insertion in model container [2019-11-06 22:13:52,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:52" (3/3) ... [2019-11-06 22:13:52,130 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-06 22:13:52,141 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:13:52,150 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:13:52,163 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:13:52,196 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:13:52,196 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:13:52,197 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:13:52,197 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:13:52,197 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:13:52,198 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:13:52,198 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:13:52,198 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:13:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2019-11-06 22:13:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 22:13:52,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:52,244 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:52,246 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:52,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:52,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1555775493, now seen corresponding path program 1 times [2019-11-06 22:13:52,258 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:52,258 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421426365] [2019-11-06 22:13:52,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:52,718 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-11-06 22:13:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:52,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421426365] [2019-11-06 22:13:52,760 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:52,760 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:52,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376862669] [2019-11-06 22:13:52,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:52,768 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:52,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:52,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:52,788 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 4 states. [2019-11-06 22:13:52,993 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-11-06 22:13:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:53,508 INFO L93 Difference]: Finished difference Result 197 states and 307 transitions. [2019-11-06 22:13:53,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:53,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-06 22:13:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:53,524 INFO L225 Difference]: With dead ends: 197 [2019-11-06 22:13:53,524 INFO L226 Difference]: Without dead ends: 126 [2019-11-06 22:13:53,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-06 22:13:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2019-11-06 22:13:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-06 22:13:53,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 182 transitions. [2019-11-06 22:13:53,586 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 182 transitions. Word has length 41 [2019-11-06 22:13:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:53,586 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 182 transitions. [2019-11-06 22:13:53,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 182 transitions. [2019-11-06 22:13:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:13:53,588 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:53,589 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:53,589 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:53,590 INFO L82 PathProgramCache]: Analyzing trace with hash 477079428, now seen corresponding path program 1 times [2019-11-06 22:13:53,591 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:53,591 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217044836] [2019-11-06 22:13:53,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:53,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217044836] [2019-11-06 22:13:53,833 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:53,833 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:53,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558060688] [2019-11-06 22:13:53,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:53,836 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:53,836 INFO L87 Difference]: Start difference. First operand 124 states and 182 transitions. Second operand 4 states. [2019-11-06 22:13:53,969 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-11-06 22:13:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:54,328 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2019-11-06 22:13:54,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:54,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-11-06 22:13:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:54,333 INFO L225 Difference]: With dead ends: 292 [2019-11-06 22:13:54,333 INFO L226 Difference]: Without dead ends: 192 [2019-11-06 22:13:54,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-06 22:13:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2019-11-06 22:13:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-06 22:13:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 285 transitions. [2019-11-06 22:13:54,361 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 285 transitions. Word has length 42 [2019-11-06 22:13:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:54,361 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 285 transitions. [2019-11-06 22:13:54,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 285 transitions. [2019-11-06 22:13:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 22:13:54,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:54,363 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:54,364 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1738555772, now seen corresponding path program 1 times [2019-11-06 22:13:54,364 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:54,365 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640579461] [2019-11-06 22:13:54,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:54,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640579461] [2019-11-06 22:13:54,591 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:54,591 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:13:54,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896605587] [2019-11-06 22:13:54,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:13:54,592 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:54,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:13:54,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:54,593 INFO L87 Difference]: Start difference. First operand 190 states and 285 transitions. Second operand 6 states. [2019-11-06 22:13:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:55,107 INFO L93 Difference]: Finished difference Result 854 states and 1329 transitions. [2019-11-06 22:13:55,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:13:55,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-11-06 22:13:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:55,119 INFO L225 Difference]: With dead ends: 854 [2019-11-06 22:13:55,119 INFO L226 Difference]: Without dead ends: 688 [2019-11-06 22:13:55,125 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:13:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-11-06 22:13:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 354. [2019-11-06 22:13:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2019-11-06 22:13:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 537 transitions. [2019-11-06 22:13:55,219 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 537 transitions. Word has length 43 [2019-11-06 22:13:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:55,219 INFO L462 AbstractCegarLoop]: Abstraction has 354 states and 537 transitions. [2019-11-06 22:13:55,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:13:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 537 transitions. [2019-11-06 22:13:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 22:13:55,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:55,222 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:55,222 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:55,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1920813121, now seen corresponding path program 1 times [2019-11-06 22:13:55,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:55,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16954090] [2019-11-06 22:13:55,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:55,481 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16954090] [2019-11-06 22:13:55,481 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:55,482 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:13:55,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395591886] [2019-11-06 22:13:55,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:13:55,483 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:55,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:13:55,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:55,484 INFO L87 Difference]: Start difference. First operand 354 states and 537 transitions. Second operand 6 states. [2019-11-06 22:13:56,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:56,052 INFO L93 Difference]: Finished difference Result 1232 states and 1892 transitions. [2019-11-06 22:13:56,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:13:56,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-11-06 22:13:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:56,058 INFO L225 Difference]: With dead ends: 1232 [2019-11-06 22:13:56,059 INFO L226 Difference]: Without dead ends: 902 [2019-11-06 22:13:56,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-11-06 22:13:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 898. [2019-11-06 22:13:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2019-11-06 22:13:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1369 transitions. [2019-11-06 22:13:56,116 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1369 transitions. Word has length 44 [2019-11-06 22:13:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:56,117 INFO L462 AbstractCegarLoop]: Abstraction has 898 states and 1369 transitions. [2019-11-06 22:13:56,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:13:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1369 transitions. [2019-11-06 22:13:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:13:56,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:56,119 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:56,120 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1112409250, now seen corresponding path program 1 times [2019-11-06 22:13:56,120 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:56,121 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905030307] [2019-11-06 22:13:56,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:56,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905030307] [2019-11-06 22:13:56,259 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:56,259 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:56,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992649303] [2019-11-06 22:13:56,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:56,260 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:56,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:56,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:56,261 INFO L87 Difference]: Start difference. First operand 898 states and 1369 transitions. Second operand 4 states. [2019-11-06 22:13:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:56,856 INFO L93 Difference]: Finished difference Result 2334 states and 3555 transitions. [2019-11-06 22:13:56,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:56,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-11-06 22:13:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:56,866 INFO L225 Difference]: With dead ends: 2334 [2019-11-06 22:13:56,866 INFO L226 Difference]: Without dead ends: 1460 [2019-11-06 22:13:56,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 22:13:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2019-11-06 22:13:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1458. [2019-11-06 22:13:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1458 states. [2019-11-06 22:13:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2185 transitions. [2019-11-06 22:13:56,953 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2185 transitions. Word has length 46 [2019-11-06 22:13:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:56,953 INFO L462 AbstractCegarLoop]: Abstraction has 1458 states and 2185 transitions. [2019-11-06 22:13:56,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2185 transitions. [2019-11-06 22:13:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:13:56,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:56,959 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:56,960 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1926406488, now seen corresponding path program 1 times [2019-11-06 22:13:56,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:56,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133977080] [2019-11-06 22:13:56,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:57,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133977080] [2019-11-06 22:13:57,165 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:57,165 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:13:57,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444892516] [2019-11-06 22:13:57,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:13:57,166 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:57,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:13:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:13:57,167 INFO L87 Difference]: Start difference. First operand 1458 states and 2185 transitions. Second operand 7 states. [2019-11-06 22:13:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:57,900 INFO L93 Difference]: Finished difference Result 5648 states and 8476 transitions. [2019-11-06 22:13:57,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:13:57,900 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-11-06 22:13:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:57,922 INFO L225 Difference]: With dead ends: 5648 [2019-11-06 22:13:57,922 INFO L226 Difference]: Without dead ends: 4214 [2019-11-06 22:13:57,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:13:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2019-11-06 22:13:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 4210. [2019-11-06 22:13:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4210 states. [2019-11-06 22:13:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 6281 transitions. [2019-11-06 22:13:58,180 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 6281 transitions. Word has length 46 [2019-11-06 22:13:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:58,189 INFO L462 AbstractCegarLoop]: Abstraction has 4210 states and 6281 transitions. [2019-11-06 22:13:58,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:13:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 6281 transitions. [2019-11-06 22:13:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:13:58,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:58,192 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:58,192 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash -742396141, now seen corresponding path program 1 times [2019-11-06 22:13:58,193 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:58,193 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744992592] [2019-11-06 22:13:58,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:58,440 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744992592] [2019-11-06 22:13:58,441 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:58,441 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:13:58,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910707026] [2019-11-06 22:13:58,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:13:58,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:13:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:58,442 INFO L87 Difference]: Start difference. First operand 4210 states and 6281 transitions. Second operand 6 states. [2019-11-06 22:13:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:59,374 INFO L93 Difference]: Finished difference Result 8684 states and 12826 transitions. [2019-11-06 22:13:59,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:13:59,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-11-06 22:13:59,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:59,427 INFO L225 Difference]: With dead ends: 8684 [2019-11-06 22:13:59,428 INFO L226 Difference]: Without dead ends: 8682 [2019-11-06 22:13:59,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:13:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8682 states. [2019-11-06 22:13:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8682 to 4498. [2019-11-06 22:13:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4498 states. [2019-11-06 22:13:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 6569 transitions. [2019-11-06 22:13:59,888 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 6569 transitions. Word has length 46 [2019-11-06 22:13:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:59,889 INFO L462 AbstractCegarLoop]: Abstraction has 4498 states and 6569 transitions. [2019-11-06 22:13:59,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:13:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 6569 transitions. [2019-11-06 22:13:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:13:59,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:59,890 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:59,890 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:59,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1529824191, now seen corresponding path program 1 times [2019-11-06 22:13:59,890 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:59,891 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755209768] [2019-11-06 22:13:59,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:00,016 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755209768] [2019-11-06 22:14:00,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:00,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:00,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341028091] [2019-11-06 22:14:00,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:00,017 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:00,018 INFO L87 Difference]: Start difference. First operand 4498 states and 6569 transitions. Second operand 4 states. [2019-11-06 22:14:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:00,841 INFO L93 Difference]: Finished difference Result 10814 states and 15783 transitions. [2019-11-06 22:14:00,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:00,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-06 22:14:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:00,872 INFO L225 Difference]: With dead ends: 10814 [2019-11-06 22:14:00,872 INFO L226 Difference]: Without dead ends: 6340 [2019-11-06 22:14:00,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 22:14:00,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2019-11-06 22:14:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6278. [2019-11-06 22:14:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2019-11-06 22:14:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9057 transitions. [2019-11-06 22:14:01,274 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9057 transitions. Word has length 47 [2019-11-06 22:14:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:01,274 INFO L462 AbstractCegarLoop]: Abstraction has 6278 states and 9057 transitions. [2019-11-06 22:14:01,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9057 transitions. [2019-11-06 22:14:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 22:14:01,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:01,279 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-11-06 22:14:01,279 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1418257868, now seen corresponding path program 1 times [2019-11-06 22:14:01,280 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:01,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891054171] [2019-11-06 22:14:01,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:01,456 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891054171] [2019-11-06 22:14:01,456 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051207771] [2019-11-06 22:14:01,456 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 22:14:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:01,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:14:01,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:14:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:01,797 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:14:01,797 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-06 22:14:01,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068700294] [2019-11-06 22:14:01,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:14:01,799 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:01,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:14:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:14:01,800 INFO L87 Difference]: Start difference. First operand 6278 states and 9057 transitions. Second operand 12 states. [2019-11-06 22:14:01,968 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2019-11-06 22:14:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:03,756 INFO L93 Difference]: Finished difference Result 20769 states and 29803 transitions. [2019-11-06 22:14:03,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:14:03,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-11-06 22:14:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:03,810 INFO L225 Difference]: With dead ends: 20769 [2019-11-06 22:14:03,810 INFO L226 Difference]: Without dead ends: 16623 [2019-11-06 22:14:03,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:14:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16623 states. [2019-11-06 22:14:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16623 to 8858. [2019-11-06 22:14:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8858 states. [2019-11-06 22:14:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 12721 transitions. [2019-11-06 22:14:04,541 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 12721 transitions. Word has length 65 [2019-11-06 22:14:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:04,544 INFO L462 AbstractCegarLoop]: Abstraction has 8858 states and 12721 transitions. [2019-11-06 22:14:04,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:14:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 12721 transitions. [2019-11-06 22:14:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 22:14:04,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:04,547 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-11-06 22:14:04,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:14:04,839 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1905093699, now seen corresponding path program 1 times [2019-11-06 22:14:04,840 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:04,840 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379110707] [2019-11-06 22:14:04,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:05,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379110707] [2019-11-06 22:14:05,014 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:05,015 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:05,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789295250] [2019-11-06 22:14:05,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:05,015 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:05,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:05,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:05,016 INFO L87 Difference]: Start difference. First operand 8858 states and 12721 transitions. Second operand 4 states. [2019-11-06 22:14:05,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:05,882 INFO L93 Difference]: Finished difference Result 14166 states and 20229 transitions. [2019-11-06 22:14:05,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:05,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2019-11-06 22:14:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:05,901 INFO L225 Difference]: With dead ends: 14166 [2019-11-06 22:14:05,901 INFO L226 Difference]: Without dead ends: 9283 [2019-11-06 22:14:05,914 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 22:14:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9283 states. [2019-11-06 22:14:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9283 to 7819. [2019-11-06 22:14:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7819 states. [2019-11-06 22:14:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 11025 transitions. [2019-11-06 22:14:06,617 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 11025 transitions. Word has length 65 [2019-11-06 22:14:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:06,618 INFO L462 AbstractCegarLoop]: Abstraction has 7819 states and 11025 transitions. [2019-11-06 22:14:06,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 11025 transitions. [2019-11-06 22:14:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 22:14:06,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:06,622 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-11-06 22:14:06,622 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:06,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1174779130, now seen corresponding path program 1 times [2019-11-06 22:14:06,622 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:06,623 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286185769] [2019-11-06 22:14:06,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:06,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286185769] [2019-11-06 22:14:06,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315735766] [2019-11-06 22:14:06,901 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 22:14:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:07,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:14:07,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:14:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:14:07,076 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:14:07,076 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-11-06 22:14:07,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363375343] [2019-11-06 22:14:07,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:14:07,077 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:07,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:14:07,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:14:07,077 INFO L87 Difference]: Start difference. First operand 7819 states and 11025 transitions. Second operand 5 states. [2019-11-06 22:14:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:07,858 INFO L93 Difference]: Finished difference Result 19725 states and 27791 transitions. [2019-11-06 22:14:07,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:07,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-11-06 22:14:07,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:07,880 INFO L225 Difference]: With dead ends: 19725 [2019-11-06 22:14:07,880 INFO L226 Difference]: Without dead ends: 11970 [2019-11-06 22:14:07,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:14:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11970 states. [2019-11-06 22:14:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11970 to 11857. [2019-11-06 22:14:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11857 states. [2019-11-06 22:14:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11857 states to 11857 states and 16607 transitions. [2019-11-06 22:14:08,728 INFO L78 Accepts]: Start accepts. Automaton has 11857 states and 16607 transitions. Word has length 65 [2019-11-06 22:14:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:08,728 INFO L462 AbstractCegarLoop]: Abstraction has 11857 states and 16607 transitions. [2019-11-06 22:14:08,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:14:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 11857 states and 16607 transitions. [2019-11-06 22:14:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 22:14:08,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:08,732 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-11-06 22:14:08,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:14:08,936 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 442725761, now seen corresponding path program 1 times [2019-11-06 22:14:08,938 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:08,938 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458009340] [2019-11-06 22:14:08,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:09,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458009340] [2019-11-06 22:14:09,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431023456] [2019-11-06 22:14:09,153 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 22:14:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:09,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:14:09,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:14:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:09,336 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:14:09,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-06 22:14:09,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213796578] [2019-11-06 22:14:09,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:14:09,337 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:14:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:14:09,337 INFO L87 Difference]: Start difference. First operand 11857 states and 16607 transitions. Second operand 12 states. [2019-11-06 22:14:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:11,368 INFO L93 Difference]: Finished difference Result 26538 states and 36961 transitions. [2019-11-06 22:14:11,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:14:11,369 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-11-06 22:14:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:11,408 INFO L225 Difference]: With dead ends: 26538 [2019-11-06 22:14:11,408 INFO L226 Difference]: Without dead ends: 22932 [2019-11-06 22:14:11,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:14:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22932 states. [2019-11-06 22:14:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22932 to 13263. [2019-11-06 22:14:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13263 states. [2019-11-06 22:14:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13263 states to 13263 states and 18540 transitions. [2019-11-06 22:14:13,009 INFO L78 Accepts]: Start accepts. Automaton has 13263 states and 18540 transitions. Word has length 65 [2019-11-06 22:14:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:13,010 INFO L462 AbstractCegarLoop]: Abstraction has 13263 states and 18540 transitions. [2019-11-06 22:14:13,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:14:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 13263 states and 18540 transitions. [2019-11-06 22:14:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 22:14:13,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:13,014 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:13,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:14:13,219 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:13,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1883912516, now seen corresponding path program 1 times [2019-11-06 22:14:13,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:13,220 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079470594] [2019-11-06 22:14:13,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:13,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079470594] [2019-11-06 22:14:13,345 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:13,345 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:13,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473976091] [2019-11-06 22:14:13,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:13,346 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:13,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:13,347 INFO L87 Difference]: Start difference. First operand 13263 states and 18540 transitions. Second operand 4 states. [2019-11-06 22:14:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:14,433 INFO L93 Difference]: Finished difference Result 23665 states and 32961 transitions. [2019-11-06 22:14:14,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:14:14,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-11-06 22:14:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:14,452 INFO L225 Difference]: With dead ends: 23665 [2019-11-06 22:14:14,452 INFO L226 Difference]: Without dead ends: 14152 [2019-11-06 22:14:14,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14152 states. [2019-11-06 22:14:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14152 to 14133. [2019-11-06 22:14:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14133 states. [2019-11-06 22:14:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14133 states to 14133 states and 19350 transitions. [2019-11-06 22:14:15,357 INFO L78 Accepts]: Start accepts. Automaton has 14133 states and 19350 transitions. Word has length 66 [2019-11-06 22:14:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:15,357 INFO L462 AbstractCegarLoop]: Abstraction has 14133 states and 19350 transitions. [2019-11-06 22:14:15,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 14133 states and 19350 transitions. [2019-11-06 22:14:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 22:14:15,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:15,362 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:14:15,363 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2075170094, now seen corresponding path program 1 times [2019-11-06 22:14:15,363 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:15,363 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531494745] [2019-11-06 22:14:15,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:15,748 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531494745] [2019-11-06 22:14:15,748 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014560026] [2019-11-06 22:14:15,749 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 22:14:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:15,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:14:15,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:14:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 22:14:15,937 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:14:15,937 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 13 [2019-11-06 22:14:15,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233440190] [2019-11-06 22:14:15,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:14:15,940 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:15,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:14:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:14:15,940 INFO L87 Difference]: Start difference. First operand 14133 states and 19350 transitions. Second operand 13 states. [2019-11-06 22:14:16,145 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 110