/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:52:50,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:52:50,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:52:50,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:52:50,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:52:50,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:52:50,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:52:50,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:52:50,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:52:50,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:52:50,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:52:50,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:52:50,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:52:50,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:52:50,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:52:50,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:52:50,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:52:50,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:52:50,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:52:50,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:52:50,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:52:50,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:52:50,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:52:50,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:52:50,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:52:50,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:52:50,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:52:50,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:52:50,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:52:50,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:52:50,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:52:50,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:52:50,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:52:50,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:52:50,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:52:50,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:52:50,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:52:50,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:52:50,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:52:50,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:52:50,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:52:50,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:52:50,642 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:52:50,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:52:50,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:52:50,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:52:50,644 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:52:50,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:52:50,645 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:52:50,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:52:50,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:52:50,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:52:50,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:52:50,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:52:50,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:52:50,646 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:52:50,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:52:50,646 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:52:50,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:52:50,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:52:50,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:52:50,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:52:50,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:52:50,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:52:50,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:52:50,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:52:50,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:52:50,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:52:50,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:52:50,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:52:50,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:52:50,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:52:50,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:52:50,933 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:52:50,936 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:52:50,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:52:50,938 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:52:50,939 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:52:51,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/625ad52e5/e3c7f331085b4771897a67269c630474/FLAG7f9e4d514 [2020-10-12 19:52:51,513 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:52:51,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:52:51,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/625ad52e5/e3c7f331085b4771897a67269c630474/FLAG7f9e4d514 [2020-10-12 19:52:51,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/625ad52e5/e3c7f331085b4771897a67269c630474 [2020-10-12 19:52:51,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:52:51,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:52:51,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:52:51,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:52:51,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:52:51,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:52:51" (1/1) ... [2020-10-12 19:52:51,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9260ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:51, skipping insertion in model container [2020-10-12 19:52:51,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:52:51" (1/1) ... [2020-10-12 19:52:51,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:52:51,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:52:52,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:52:52,404 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:52:52,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:52:52,518 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:52:52,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52 WrapperNode [2020-10-12 19:52:52,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:52:52,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:52:52,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:52:52,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:52:52,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52" (1/1) ... [2020-10-12 19:52:52,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52" (1/1) ... [2020-10-12 19:52:52,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52" (1/1) ... [2020-10-12 19:52:52,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52" (1/1) ... [2020-10-12 19:52:52,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52" (1/1) ... [2020-10-12 19:52:52,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52" (1/1) ... [2020-10-12 19:52:52,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52" (1/1) ... [2020-10-12 19:52:52,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:52:52,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:52:52,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:52:52,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:52:52,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 19:52:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:52:52,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:52:52,647 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:52:52,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:52:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:52:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:52:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:52:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:52:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:52:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:52:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:52:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:52:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:52:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:52:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:52:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:52:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:52:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:52:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:52:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:52:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:52:53,383 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:52:53,383 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:52:53,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:52:53 BoogieIcfgContainer [2020-10-12 19:52:53,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:52:53,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:52:53,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:52:53,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:52:53,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:52:51" (1/3) ... [2020-10-12 19:52:53,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42db5e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:52:53, skipping insertion in model container [2020-10-12 19:52:53,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:52" (2/3) ... [2020-10-12 19:52:53,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42db5e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:52:53, skipping insertion in model container [2020-10-12 19:52:53,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:52:53" (3/3) ... [2020-10-12 19:52:53,397 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:52:53,408 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:52:53,415 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:52:53,429 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:52:53,455 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:52:53,455 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:52:53,455 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:52:53,455 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:52:53,456 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:52:53,456 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:52:53,456 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:52:53,456 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:52:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states. [2020-10-12 19:52:53,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:52:53,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:53,489 INFO L422 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:52:53,490 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:53,496 INFO L82 PathProgramCache]: Analyzing trace with hash 271329335, now seen corresponding path program 1 times [2020-10-12 19:52:53,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:53,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148038618] [2020-10-12 19:52:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:53,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:54,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:54,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:55,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:55,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:52:55,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:52:55,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1513 [2020-10-12 19:52:55,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:55,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:52:55,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:52:55,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 19:52:55,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:52:55,506 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 19:52:55,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:55,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:55,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:55,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:55,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:55,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:52:55,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:55,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:55,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148038618] [2020-10-12 19:52:55,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:55,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:52:55,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016610731] [2020-10-12 19:52:55,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:52:55,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:52:55,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:52:55,601 INFO L87 Difference]: Start difference. First operand 166 states. Second operand 6 states. [2020-10-12 19:52:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:56,879 INFO L93 Difference]: Finished difference Result 486 states and 793 transitions. [2020-10-12 19:52:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:52:56,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-12 19:52:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:56,898 INFO L225 Difference]: With dead ends: 486 [2020-10-12 19:52:56,898 INFO L226 Difference]: Without dead ends: 353 [2020-10-12 19:52:56,902 INFO L675 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 [2020-10-12 19:52:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-12 19:52:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2020-10-12 19:52:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-12 19:52:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 522 transitions. [2020-10-12 19:52:56,980 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 522 transitions. Word has length 53 [2020-10-12 19:52:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:56,981 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 522 transitions. [2020-10-12 19:52:56,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:52:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 522 transitions. [2020-10-12 19:52:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:52:56,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:56,984 INFO L422 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:52:56,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:52:56,985 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1131735624, now seen corresponding path program 1 times [2020-10-12 19:52:56,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:56,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150148162] [2020-10-12 19:52:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:57,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:57,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:57,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:57,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:57,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:52:57,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:52:57,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-12 19:52:57,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:57,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:52:57,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:52:57,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:52:57,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:57,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:57,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:57,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:57,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:57,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:57,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:52:57,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:57,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:57,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150148162] [2020-10-12 19:52:57,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:57,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:52:57,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601514755] [2020-10-12 19:52:57,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:52:58,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:58,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:52:58,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:52:58,000 INFO L87 Difference]: Start difference. First operand 349 states and 522 transitions. Second operand 6 states. [2020-10-12 19:52:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:58,887 INFO L93 Difference]: Finished difference Result 1001 states and 1546 transitions. [2020-10-12 19:52:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:52:58,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-12 19:52:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:58,894 INFO L225 Difference]: With dead ends: 1001 [2020-10-12 19:52:58,894 INFO L226 Difference]: Without dead ends: 846 [2020-10-12 19:52:58,900 INFO L675 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 [2020-10-12 19:52:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-10-12 19:52:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 596. [2020-10-12 19:52:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-10-12 19:52:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 904 transitions. [2020-10-12 19:52:58,980 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 904 transitions. Word has length 54 [2020-10-12 19:52:58,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:58,981 INFO L479 AbstractCegarLoop]: Abstraction has 596 states and 904 transitions. [2020-10-12 19:52:58,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:52:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 904 transitions. [2020-10-12 19:52:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:52:58,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:58,993 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:52:58,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:52:58,994 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2141104701, now seen corresponding path program 1 times [2020-10-12 19:52:58,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:58,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531026433] [2020-10-12 19:52:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:59,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:59,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:59,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:59,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:59,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:59,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:59,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:00,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:04,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:04,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:53:04,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:53:04,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:53:04,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:53:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:04,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:53:04,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:53:04,296 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 19:53:04,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:04,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:04,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:04,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:04,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:04,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:53:04,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:04,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:04,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:04,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:04,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:04,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531026433] [2020-10-12 19:53:04,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:04,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:53:04,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170596868] [2020-10-12 19:53:04,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:53:04,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:04,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:53:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:53:04,348 INFO L87 Difference]: Start difference. First operand 596 states and 904 transitions. Second operand 11 states. [2020-10-12 19:53:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:07,440 INFO L93 Difference]: Finished difference Result 6554 states and 10065 transitions. [2020-10-12 19:53:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 19:53:07,441 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-12 19:53:07,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:07,485 INFO L225 Difference]: With dead ends: 6554 [2020-10-12 19:53:07,485 INFO L226 Difference]: Without dead ends: 6058 [2020-10-12 19:53:07,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=1367, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 19:53:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2020-10-12 19:53:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 2694. [2020-10-12 19:53:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2694 states. [2020-10-12 19:53:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 4110 transitions. [2020-10-12 19:53:07,788 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 4110 transitions. Word has length 57 [2020-10-12 19:53:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:07,791 INFO L479 AbstractCegarLoop]: Abstraction has 2694 states and 4110 transitions. [2020-10-12 19:53:07,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:53:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 4110 transitions. [2020-10-12 19:53:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:53:07,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:07,794 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:07,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:53:07,794 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1315275649, now seen corresponding path program 1 times [2020-10-12 19:53:07,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:07,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610837164] [2020-10-12 19:53:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:07,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:07,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:07,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:08,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:08,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:08,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:12,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:12,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:53:12,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:53:12,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4450 [2020-10-12 19:53:12,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 19:53:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 19:53:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:53:12,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:12,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:12,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:12,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:12,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:12,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:12,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:53:12,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:12,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:12,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:12,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:12,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:12,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610837164] [2020-10-12 19:53:12,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:12,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 19:53:12,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802947718] [2020-10-12 19:53:12,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 19:53:12,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:12,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 19:53:12,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:53:12,467 INFO L87 Difference]: Start difference. First operand 2694 states and 4110 transitions. Second operand 9 states. [2020-10-12 19:53:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:14,743 INFO L93 Difference]: Finished difference Result 11245 states and 17157 transitions. [2020-10-12 19:53:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 19:53:14,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-12 19:53:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:14,788 INFO L225 Difference]: With dead ends: 11245 [2020-10-12 19:53:14,788 INFO L226 Difference]: Without dead ends: 9297 [2020-10-12 19:53:14,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:53:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9297 states. [2020-10-12 19:53:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9297 to 3006. [2020-10-12 19:53:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3006 states. [2020-10-12 19:53:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 4564 transitions. [2020-10-12 19:53:15,134 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 4564 transitions. Word has length 57 [2020-10-12 19:53:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:15,137 INFO L479 AbstractCegarLoop]: Abstraction has 3006 states and 4564 transitions. [2020-10-12 19:53:15,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 19:53:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 4564 transitions. [2020-10-12 19:53:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:53:15,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:15,141 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:15,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:53:15,141 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:15,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash -377427777, now seen corresponding path program 1 times [2020-10-12 19:53:15,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:15,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792439221] [2020-10-12 19:53:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:15,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:15,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:15,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:15,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:17,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:17,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:53:17,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:53:17,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2014 [2020-10-12 19:53:17,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:17,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:53:17,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:17,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:53:17,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:17,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:17,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:17,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:17,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:17,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:17,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:53:17,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:17,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792439221] [2020-10-12 19:53:17,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:17,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:53:17,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8244207] [2020-10-12 19:53:17,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:53:17,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:17,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:53:17,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:53:17,362 INFO L87 Difference]: Start difference. First operand 3006 states and 4564 transitions. Second operand 8 states. [2020-10-12 19:53:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:18,990 INFO L93 Difference]: Finished difference Result 9936 states and 15065 transitions. [2020-10-12 19:53:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:53:18,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-12 19:53:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:19,032 INFO L225 Difference]: With dead ends: 9936 [2020-10-12 19:53:19,033 INFO L226 Difference]: Without dead ends: 8703 [2020-10-12 19:53:19,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:53:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8703 states. [2020-10-12 19:53:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8703 to 3056. [2020-10-12 19:53:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3056 states. [2020-10-12 19:53:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 4629 transitions. [2020-10-12 19:53:19,357 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 4629 transitions. Word has length 57 [2020-10-12 19:53:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:19,357 INFO L479 AbstractCegarLoop]: Abstraction has 3056 states and 4629 transitions. [2020-10-12 19:53:19,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:53:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 4629 transitions. [2020-10-12 19:53:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:53:19,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:19,360 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:19,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:53:19,360 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash -224897441, now seen corresponding path program 1 times [2020-10-12 19:53:19,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:19,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295308134] [2020-10-12 19:53:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:19,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:19,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:19,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:19,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:19,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:20,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:23,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:23,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:53:23,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:53:23,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3641 [2020-10-12 19:53:23,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:23,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 19:53:23,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 19:53:23,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:53:23,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:23,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:23,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:23,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:23,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:23,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:53:23,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:23,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:23,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295308134] [2020-10-12 19:53:23,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:23,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 19:53:23,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184579045] [2020-10-12 19:53:23,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 19:53:23,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:23,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 19:53:23,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:53:23,192 INFO L87 Difference]: Start difference. First operand 3056 states and 4629 transitions. Second operand 9 states. [2020-10-12 19:53:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:25,974 INFO L93 Difference]: Finished difference Result 22039 states and 33550 transitions. [2020-10-12 19:53:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 19:53:25,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-12 19:53:25,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:26,018 INFO L225 Difference]: With dead ends: 22039 [2020-10-12 19:53:26,018 INFO L226 Difference]: Without dead ends: 19215 [2020-10-12 19:53:26,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-10-12 19:53:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19215 states. [2020-10-12 19:53:26,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19215 to 6367. [2020-10-12 19:53:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6367 states. [2020-10-12 19:53:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 9652 transitions. [2020-10-12 19:53:26,635 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 9652 transitions. Word has length 57 [2020-10-12 19:53:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:26,635 INFO L479 AbstractCegarLoop]: Abstraction has 6367 states and 9652 transitions. [2020-10-12 19:53:26,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 19:53:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 9652 transitions. [2020-10-12 19:53:26,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:53:26,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:26,638 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:26,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:53:26,639 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash 613689505, now seen corresponding path program 1 times [2020-10-12 19:53:26,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:26,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619743891] [2020-10-12 19:53:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:26,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:26,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:26,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:26,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:26,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:28,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:28,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:53:28,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:53:28,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1594 [2020-10-12 19:53:28,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:28,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:53:28,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:28,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:53:28,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:28,497 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 19:53:28,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:28,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:28,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:28,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:28,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:28,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:53:28,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:28,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:28,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:28,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:53:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:28,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619743891] [2020-10-12 19:53:28,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:28,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:53:28,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875265376] [2020-10-12 19:53:28,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:53:28,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:53:28,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:53:28,559 INFO L87 Difference]: Start difference. First operand 6367 states and 9652 transitions. Second operand 8 states. [2020-10-12 19:53:28,718 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 19:53:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:31,393 INFO L93 Difference]: Finished difference Result 28678 states and 43289 transitions. [2020-10-12 19:53:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:53:31,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-12 19:53:31,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:31,445 INFO L225 Difference]: With dead ends: 28678 [2020-10-12 19:53:31,446 INFO L226 Difference]: Without dead ends: 23286 [2020-10-12 19:53:31,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:53:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23286 states. [2020-10-12 19:53:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23286 to 6002. [2020-10-12 19:53:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6002 states. [2020-10-12 19:53:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6002 states to 6002 states and 8976 transitions. [2020-10-12 19:53:32,128 INFO L78 Accepts]: Start accepts. Automaton has 6002 states and 8976 transitions. Word has length 57 [2020-10-12 19:53:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:32,128 INFO L479 AbstractCegarLoop]: Abstraction has 6002 states and 8976 transitions. [2020-10-12 19:53:32,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:53:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6002 states and 8976 transitions. [2020-10-12 19:53:32,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:53:32,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:32,131 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:32,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:53:32,132 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:32,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1551537377, now seen corresponding path program 1 times [2020-10-12 19:53:32,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:32,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649503593] [2020-10-12 19:53:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:32,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:32,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:32,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:32,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:32,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:32,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:33,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:36,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:36,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:53:36,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:53:36,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4516 [2020-10-12 19:53:36,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:36,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:53:36,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:53:36,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:36,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:36,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:36,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:36,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:36,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:36,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:53:36,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:36,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:36,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:36,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:36,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:36,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649503593] [2020-10-12 19:53:36,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:36,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:53:36,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821060651] [2020-10-12 19:53:36,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:53:36,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:36,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:53:36,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:53:36,941 INFO L87 Difference]: Start difference. First operand 6002 states and 8976 transitions. Second operand 11 states. [2020-10-12 19:53:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:40,775 INFO L93 Difference]: Finished difference Result 18312 states and 27316 transitions. [2020-10-12 19:53:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:53:40,775 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-12 19:53:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:40,808 INFO L225 Difference]: With dead ends: 18312 [2020-10-12 19:53:40,808 INFO L226 Difference]: Without dead ends: 16650 [2020-10-12 19:53:40,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:53:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2020-10-12 19:53:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 8742. [2020-10-12 19:53:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8742 states. [2020-10-12 19:53:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 13014 transitions. [2020-10-12 19:53:41,775 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 13014 transitions. Word has length 57 [2020-10-12 19:53:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:41,775 INFO L479 AbstractCegarLoop]: Abstraction has 8742 states and 13014 transitions. [2020-10-12 19:53:41,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:53:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 13014 transitions. [2020-10-12 19:53:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:53:41,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:41,780 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:41,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:53:41,781 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:41,781 INFO L82 PathProgramCache]: Analyzing trace with hash -474490290, now seen corresponding path program 1 times [2020-10-12 19:53:41,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:41,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453175446] [2020-10-12 19:53:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:41,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:41,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:41,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:42,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:42,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:43,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:43,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:53:43,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:53:43,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1257 [2020-10-12 19:53:43,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:53:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:53:43,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:43,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:43,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:43,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:43,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:43,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:53:43,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:43,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:43,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453175446] [2020-10-12 19:53:43,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:43,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:53:43,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056046424] [2020-10-12 19:53:43,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:53:43,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:53:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:53:43,293 INFO L87 Difference]: Start difference. First operand 8742 states and 13014 transitions. Second operand 8 states. [2020-10-12 19:53:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:49,103 INFO L93 Difference]: Finished difference Result 49470 states and 72893 transitions. [2020-10-12 19:53:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:53:49,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-12 19:53:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:49,179 INFO L225 Difference]: With dead ends: 49470 [2020-10-12 19:53:49,179 INFO L226 Difference]: Without dead ends: 43841 [2020-10-12 19:53:49,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:53:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43841 states. [2020-10-12 19:53:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43841 to 3169. [2020-10-12 19:53:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3169 states. [2020-10-12 19:53:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 4632 transitions. [2020-10-12 19:53:50,091 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 4632 transitions. Word has length 57 [2020-10-12 19:53:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:50,092 INFO L479 AbstractCegarLoop]: Abstraction has 3169 states and 4632 transitions. [2020-10-12 19:53:50,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:53:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 4632 transitions. [2020-10-12 19:53:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:53:50,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:50,094 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:50,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:53:50,095 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:50,095 INFO L82 PathProgramCache]: Analyzing trace with hash 364096656, now seen corresponding path program 1 times [2020-10-12 19:53:50,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:50,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865227787] [2020-10-12 19:53:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:50,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:50,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:50,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:50,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:50,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:50,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:50,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:52,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:52,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:53:52,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:53:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2787 [2020-10-12 19:53:52,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:52,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:53:52,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:53:52,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:53:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:53,096 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-12 19:53:53,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:53,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:53,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:53,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:53,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:53,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:53:53,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:53,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:53,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865227787] [2020-10-12 19:53:53,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:53,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:53:53,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500486910] [2020-10-12 19:53:53,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:53:53,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:53,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:53:53,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:53:53,255 INFO L87 Difference]: Start difference. First operand 3169 states and 4632 transitions. Second operand 11 states. [2020-10-12 19:53:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:58,514 INFO L93 Difference]: Finished difference Result 15598 states and 22962 transitions. [2020-10-12 19:53:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:53:58,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-12 19:53:58,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:58,529 INFO L225 Difference]: With dead ends: 15598 [2020-10-12 19:53:58,529 INFO L226 Difference]: Without dead ends: 12789 [2020-10-12 19:53:58,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2020-10-12 19:53:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12789 states. [2020-10-12 19:53:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12789 to 5294. [2020-10-12 19:53:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5294 states. [2020-10-12 19:53:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 7775 transitions. [2020-10-12 19:53:59,643 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 7775 transitions. Word has length 57 [2020-10-12 19:53:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:59,643 INFO L479 AbstractCegarLoop]: Abstraction has 5294 states and 7775 transitions. [2020-10-12 19:53:59,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:53:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 7775 transitions. [2020-10-12 19:53:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:53:59,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:59,646 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:59,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:53:59,646 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:59,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:59,647 INFO L82 PathProgramCache]: Analyzing trace with hash -682184023, now seen corresponding path program 1 times [2020-10-12 19:53:59,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:59,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744643490] [2020-10-12 19:53:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:59,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:59,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:59,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:00,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:00,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:54:00,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:54:00,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-12 19:54:00,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:00,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:54:00,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:54:00,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:54:00,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:00,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:00,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:00,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:00,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:00,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:00,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:54:00,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:00,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:00,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744643490] [2020-10-12 19:54:00,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:00,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:54:00,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414791797] [2020-10-12 19:54:00,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:54:00,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:00,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:54:00,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:54:00,519 INFO L87 Difference]: Start difference. First operand 5294 states and 7775 transitions. Second operand 10 states. [2020-10-12 19:54:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:09,172 INFO L93 Difference]: Finished difference Result 29362 states and 43479 transitions. [2020-10-12 19:54:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 19:54:09,172 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-12 19:54:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:09,200 INFO L225 Difference]: With dead ends: 29362 [2020-10-12 19:54:09,200 INFO L226 Difference]: Without dead ends: 27658 [2020-10-12 19:54:09,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-12 19:54:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27658 states. [2020-10-12 19:54:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27658 to 4877. [2020-10-12 19:54:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4877 states. [2020-10-12 19:54:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 7162 transitions. [2020-10-12 19:54:10,446 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 7162 transitions. Word has length 58 [2020-10-12 19:54:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:10,446 INFO L479 AbstractCegarLoop]: Abstraction has 4877 states and 7162 transitions. [2020-10-12 19:54:10,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:54:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 7162 transitions. [2020-10-12 19:54:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:54:10,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:10,448 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:10,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:54:10,449 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash 940707947, now seen corresponding path program 1 times [2020-10-12 19:54:10,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:10,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877052809] [2020-10-12 19:54:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:10,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:10,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:10,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:11,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:11,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:54:11,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:54:11,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-12 19:54:11,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:11,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:54:11,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:54:11,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:54:11,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:11,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:11,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:11,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:11,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:11,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:11,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:54:11,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:11,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:11,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:11,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:11,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:11,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877052809] [2020-10-12 19:54:11,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:11,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:54:11,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716938335] [2020-10-12 19:54:11,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:54:11,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:11,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:54:11,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:54:11,649 INFO L87 Difference]: Start difference. First operand 4877 states and 7162 transitions. Second operand 10 states. [2020-10-12 19:54:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:15,959 INFO L93 Difference]: Finished difference Result 11743 states and 17335 transitions. [2020-10-12 19:54:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:54:15,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-12 19:54:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:15,971 INFO L225 Difference]: With dead ends: 11743 [2020-10-12 19:54:15,971 INFO L226 Difference]: Without dead ends: 11201 [2020-10-12 19:54:15,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-12 19:54:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11201 states. [2020-10-12 19:54:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11201 to 4769. [2020-10-12 19:54:17,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4769 states. [2020-10-12 19:54:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 7004 transitions. [2020-10-12 19:54:17,097 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 7004 transitions. Word has length 58 [2020-10-12 19:54:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:17,097 INFO L479 AbstractCegarLoop]: Abstraction has 4769 states and 7004 transitions. [2020-10-12 19:54:17,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:54:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 7004 transitions. [2020-10-12 19:54:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:54:17,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:17,103 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:17,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:54:17,103 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:17,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:17,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1665237082, now seen corresponding path program 1 times [2020-10-12 19:54:17,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:17,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456335419] [2020-10-12 19:54:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:17,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:18,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:20,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:20,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:54:20,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:54:20,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3754 [2020-10-12 19:54:20,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:54:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 19:54:20,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:20,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:20,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:20,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:20,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:20,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:54:20,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:20,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:21,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456335419] [2020-10-12 19:54:21,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:21,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:54:21,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200932036] [2020-10-12 19:54:21,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:54:21,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:54:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:54:21,011 INFO L87 Difference]: Start difference. First operand 4769 states and 7004 transitions. Second operand 6 states. [2020-10-12 19:54:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:23,918 INFO L93 Difference]: Finished difference Result 11450 states and 16973 transitions. [2020-10-12 19:54:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:54:23,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-12 19:54:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:23,926 INFO L225 Difference]: With dead ends: 11450 [2020-10-12 19:54:23,927 INFO L226 Difference]: Without dead ends: 8596 [2020-10-12 19:54:23,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:54:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8596 states. [2020-10-12 19:54:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8596 to 8576. [2020-10-12 19:54:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8576 states. [2020-10-12 19:54:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8576 states to 8576 states and 12611 transitions. [2020-10-12 19:54:25,866 INFO L78 Accepts]: Start accepts. Automaton has 8576 states and 12611 transitions. Word has length 72 [2020-10-12 19:54:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:25,866 INFO L479 AbstractCegarLoop]: Abstraction has 8576 states and 12611 transitions. [2020-10-12 19:54:25,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:54:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 8576 states and 12611 transitions. [2020-10-12 19:54:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:54:25,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:25,874 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:25,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:54:25,874 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:25,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1973013496, now seen corresponding path program 1 times [2020-10-12 19:54:25,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:25,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544168532] [2020-10-12 19:54:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:25,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:25,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:25,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:26,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:26,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:54:26,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:54:26,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-12 19:54:26,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:26,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:54:26,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 19:54:26,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 19:54:26,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:26,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:26,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:26,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:26,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:26,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:26,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:54:26,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:26,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:26,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:26,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:26,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:26,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544168532] [2020-10-12 19:54:26,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:26,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:54:26,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152970929] [2020-10-12 19:54:26,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:54:26,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:26,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:54:26,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:54:26,756 INFO L87 Difference]: Start difference. First operand 8576 states and 12611 transitions. Second operand 6 states. [2020-10-12 19:54:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:32,628 INFO L93 Difference]: Finished difference Result 19654 states and 28748 transitions. [2020-10-12 19:54:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:54:32,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-12 19:54:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:32,645 INFO L225 Difference]: With dead ends: 19654 [2020-10-12 19:54:32,646 INFO L226 Difference]: Without dead ends: 19652 [2020-10-12 19:54:32,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:54:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19652 states. [2020-10-12 19:54:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19652 to 9020. [2020-10-12 19:54:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9020 states. [2020-10-12 19:54:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9020 states to 9020 states and 13055 transitions. [2020-10-12 19:54:34,999 INFO L78 Accepts]: Start accepts. Automaton has 9020 states and 13055 transitions. Word has length 72 [2020-10-12 19:54:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:35,000 INFO L479 AbstractCegarLoop]: Abstraction has 9020 states and 13055 transitions. [2020-10-12 19:54:35,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:54:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 9020 states and 13055 transitions. [2020-10-12 19:54:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 19:54:35,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:35,007 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:35,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:54:35,007 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:35,008 INFO L82 PathProgramCache]: Analyzing trace with hash -687300287, now seen corresponding path program 1 times [2020-10-12 19:54:35,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:35,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716722476] [2020-10-12 19:54:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:35,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:35,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:35,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:35,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:35,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:35,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:35,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 19:54:35,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:54:35,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-12 19:54:35,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:54:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:54:35,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:35,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:35,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:35,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:35,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:54:35,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:35,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716722476] [2020-10-12 19:54:35,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:35,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:54:35,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582394319] [2020-10-12 19:54:35,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:54:35,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:35,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:54:35,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:54:35,752 INFO L87 Difference]: Start difference. First operand 9020 states and 13055 transitions. Second operand 6 states. [2020-10-12 19:54:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:38,409 INFO L93 Difference]: Finished difference Result 11640 states and 16897 transitions. [2020-10-12 19:54:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:54:38,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-12 19:54:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:38,416 INFO L225 Difference]: With dead ends: 11640 [2020-10-12 19:54:38,416 INFO L226 Difference]: Without dead ends: 7644 [2020-10-12 19:54:38,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:54:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7644 states. [2020-10-12 19:54:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7644 to 7642. [2020-10-12 19:54:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7642 states. [2020-10-12 19:54:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7642 states to 7642 states and 11093 transitions. [2020-10-12 19:54:40,193 INFO L78 Accepts]: Start accepts. Automaton has 7642 states and 11093 transitions. Word has length 73 [2020-10-12 19:54:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:40,194 INFO L479 AbstractCegarLoop]: Abstraction has 7642 states and 11093 transitions. [2020-10-12 19:54:40,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:54:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 7642 states and 11093 transitions. [2020-10-12 19:54:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 19:54:40,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:40,199 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:40,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:54:40,200 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:40,200 INFO L82 PathProgramCache]: Analyzing trace with hash -447191248, now seen corresponding path program 1 times [2020-10-12 19:54:40,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:40,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997935007] [2020-10-12 19:54:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:40,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:40,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:40,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:40,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:40,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:40,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 19:54:40,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:54:40,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-12 19:54:40,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:40,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:54:40,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:40,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 19:54:40,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:40,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:40,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:40,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:40,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:40,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:40,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:54:40,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:40,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:40,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:40,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:40,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:40,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997935007] [2020-10-12 19:54:40,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:40,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:54:40,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691505302] [2020-10-12 19:54:40,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:54:40,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:54:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:54:40,966 INFO L87 Difference]: Start difference. First operand 7642 states and 11093 transitions. Second operand 6 states. [2020-10-12 19:54:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:44,242 INFO L93 Difference]: Finished difference Result 17266 states and 25276 transitions. [2020-10-12 19:54:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:54:44,242 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-12 19:54:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:44,252 INFO L225 Difference]: With dead ends: 17266 [2020-10-12 19:54:44,253 INFO L226 Difference]: Without dead ends: 10710 [2020-10-12 19:54:44,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:54:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2020-10-12 19:54:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 10708. [2020-10-12 19:54:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10708 states. [2020-10-12 19:54:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10708 states to 10708 states and 15572 transitions. [2020-10-12 19:54:46,835 INFO L78 Accepts]: Start accepts. Automaton has 10708 states and 15572 transitions. Word has length 73 [2020-10-12 19:54:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:46,835 INFO L479 AbstractCegarLoop]: Abstraction has 10708 states and 15572 transitions. [2020-10-12 19:54:46,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:54:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 10708 states and 15572 transitions. [2020-10-12 19:54:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 19:54:46,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:46,842 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:46,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:54:46,842 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:46,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2010695170, now seen corresponding path program 1 times [2020-10-12 19:54:46,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:46,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664934168] [2020-10-12 19:54:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:46,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:46,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:47,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:48,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:48,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 19:54:48,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:54:48,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1608 [2020-10-12 19:54:48,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:48,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:54:48,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:54:48,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 19:54:48,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:48,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:48,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:48,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:48,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:48,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:48,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:54:48,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:48,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:48,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:48,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:48,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:48,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664934168] [2020-10-12 19:54:48,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:48,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:54:48,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409276957] [2020-10-12 19:54:48,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:54:48,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:48,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:54:48,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:54:48,615 INFO L87 Difference]: Start difference. First operand 10708 states and 15572 transitions. Second operand 6 states. [2020-10-12 19:54:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:56,185 INFO L93 Difference]: Finished difference Result 36054 states and 52641 transitions. [2020-10-12 19:54:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:54:56,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-12 19:54:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:56,214 INFO L225 Difference]: With dead ends: 36054 [2020-10-12 19:54:56,214 INFO L226 Difference]: Without dead ends: 26300 [2020-10-12 19:54:56,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:54:56,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26300 states. [2020-10-12 19:55:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26300 to 26098. [2020-10-12 19:55:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26098 states. [2020-10-12 19:55:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26098 states to 26098 states and 37320 transitions. [2020-10-12 19:55:03,102 INFO L78 Accepts]: Start accepts. Automaton has 26098 states and 37320 transitions. Word has length 74 [2020-10-12 19:55:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:03,103 INFO L479 AbstractCegarLoop]: Abstraction has 26098 states and 37320 transitions. [2020-10-12 19:55:03,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:55:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 26098 states and 37320 transitions. [2020-10-12 19:55:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:55:03,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:03,113 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:03,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:55:03,113 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1860634657, now seen corresponding path program 1 times [2020-10-12 19:55:03,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:03,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867106914] [2020-10-12 19:55:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:03,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:05,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:05,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:55:05,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:55:05,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2557 [2020-10-12 19:55:05,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:05,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:55:05,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:05,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 19:55:05,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:05,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:05,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:05,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:05,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:05,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:05,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:55:05,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:05,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:05,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:05,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:05,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867106914] [2020-10-12 19:55:05,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:05,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:55:05,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418888603] [2020-10-12 19:55:05,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:55:05,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:05,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:55:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:05,830 INFO L87 Difference]: Start difference. First operand 26098 states and 37320 transitions. Second operand 6 states. [2020-10-12 19:55:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:13,919 INFO L93 Difference]: Finished difference Result 52798 states and 75986 transitions. [2020-10-12 19:55:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:55:13,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-12 19:55:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:13,950 INFO L225 Difference]: With dead ends: 52798 [2020-10-12 19:55:13,950 INFO L226 Difference]: Without dead ends: 28796 [2020-10-12 19:55:13,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:55:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28796 states. [2020-10-12 19:55:22,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28796 to 28794. [2020-10-12 19:55:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28794 states. [2020-10-12 19:55:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28794 states to 28794 states and 41121 transitions. [2020-10-12 19:55:22,617 INFO L78 Accepts]: Start accepts. Automaton has 28794 states and 41121 transitions. Word has length 75 [2020-10-12 19:55:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:22,617 INFO L479 AbstractCegarLoop]: Abstraction has 28794 states and 41121 transitions. [2020-10-12 19:55:22,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:55:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 28794 states and 41121 transitions. [2020-10-12 19:55:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:55:22,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:22,624 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:22,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:55:22,625 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash -967506570, now seen corresponding path program 1 times [2020-10-12 19:55:22,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:22,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189505596] [2020-10-12 19:55:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:22,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:22,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:22,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:22,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:22,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:23,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:23,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:26,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:27,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:27,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:55:27,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:55:27,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:55:27,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:27,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:55:27,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:27,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:55:27,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:27,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:27,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:27,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:27,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:27,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:27,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:55:27,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:27,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:27,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:27,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:27,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:27,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189505596] [2020-10-12 19:55:27,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:27,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:55:27,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193652862] [2020-10-12 19:55:27,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:55:27,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:55:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:27,880 INFO L87 Difference]: Start difference. First operand 28794 states and 41121 transitions. Second operand 11 states. [2020-10-12 19:55:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:56,637 INFO L93 Difference]: Finished difference Result 125367 states and 179009 transitions. [2020-10-12 19:55:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 19:55:56,637 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-12 19:55:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:56,796 INFO L225 Difference]: With dead ends: 125367 [2020-10-12 19:55:56,796 INFO L226 Difference]: Without dead ends: 97172 [2020-10-12 19:55:56,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-12 19:55:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97172 states. [2020-10-12 19:56:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97172 to 27141. [2020-10-12 19:56:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27141 states. [2020-10-12 19:56:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27141 states to 27141 states and 38735 transitions. [2020-10-12 19:56:04,871 INFO L78 Accepts]: Start accepts. Automaton has 27141 states and 38735 transitions. Word has length 75 [2020-10-12 19:56:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:04,871 INFO L479 AbstractCegarLoop]: Abstraction has 27141 states and 38735 transitions. [2020-10-12 19:56:04,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:56:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 27141 states and 38735 transitions. [2020-10-12 19:56:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:56:04,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:04,880 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:04,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:56:04,880 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:04,880 INFO L82 PathProgramCache]: Analyzing trace with hash 192302646, now seen corresponding path program 1 times [2020-10-12 19:56:04,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:04,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546427] [2020-10-12 19:56:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:04,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:05,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:09,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:09,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:56:09,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:56:09,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4833 [2020-10-12 19:56:09,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:09,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:56:09,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:56:09,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 19:56:09,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:09,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:09,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:09,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:09,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:09,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:56:09,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:09,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:09,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:09,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:09,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:09,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546427] [2020-10-12 19:56:09,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:09,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:56:09,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136634849] [2020-10-12 19:56:09,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:56:09,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:09,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:56:09,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:56:09,979 INFO L87 Difference]: Start difference. First operand 27141 states and 38735 transitions. Second operand 11 states. [2020-10-12 19:56:10,130 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:56:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:34,637 INFO L93 Difference]: Finished difference Result 78649 states and 110864 transitions. [2020-10-12 19:56:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 19:56:34,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-12 19:56:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:34,710 INFO L225 Difference]: With dead ends: 78649 [2020-10-12 19:56:34,711 INFO L226 Difference]: Without dead ends: 72241 [2020-10-12 19:56:34,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 19:56:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72241 states. [2020-10-12 19:56:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72241 to 33101. [2020-10-12 19:56:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33101 states. [2020-10-12 19:56:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33101 states to 33101 states and 47004 transitions. [2020-10-12 19:56:45,508 INFO L78 Accepts]: Start accepts. Automaton has 33101 states and 47004 transitions. Word has length 75 [2020-10-12 19:56:45,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:45,508 INFO L479 AbstractCegarLoop]: Abstraction has 33101 states and 47004 transitions. [2020-10-12 19:56:45,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:56:45,508 INFO L276 IsEmpty]: Start isEmpty. Operand 33101 states and 47004 transitions. [2020-10-12 19:56:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:56:45,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:45,517 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:45,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:56:45,517 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash -45748187, now seen corresponding path program 1 times [2020-10-12 19:56:45,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:45,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009968499] [2020-10-12 19:56:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:45,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:45,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:45,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:45,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:45,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:46,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:46,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:46,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:47,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:50,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:50,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:56:50,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:56:50,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:56:50,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:50,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 19:56:50,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:56:50,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 19:56:50,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0