/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=NARROWEST --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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:56:20,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:56:20,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:56:20,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:56:20,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:56:20,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:56:20,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:56:20,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:56:20,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:56:20,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:56:20,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:56:20,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:56:20,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:56:20,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:56:20,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:56:20,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:56:20,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:56:20,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:56:20,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:56:20,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:56:20,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:56:20,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:56:20,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:56:20,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:56:20,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:56:20,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:56:20,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:56:20,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:56:20,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:56:20,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:56:20,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:56:20,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:56:20,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:56:20,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:56:20,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:56:20,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:56:20,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:56:20,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:56:20,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:56:20,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:56:20,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:56:20,603 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 [2020-10-13 14:56:20,624 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:56:20,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:56:20,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:56:20,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:56:20,626 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:56:20,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:56:20,626 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:56:20,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:56:20,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:56:20,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:56:20,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:56:20,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:56:20,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:56:20,628 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:56:20,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:56:20,628 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:56:20,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:56:20,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:56:20,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:56:20,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:56:20,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:56:20,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:56:20,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:56:20,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:56:20,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:56:20,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:56:20,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:56:20,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:56:20,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:56:20,631 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:56:20,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:56:20,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:56:20,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:56:20,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:56:20,929 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:56:20,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:56:20,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e589cde1f/cdbbf6ee3cf04f709c6cd4ee4812c436/FLAGf67ad5543 [2020-10-13 14:56:21,529 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:56:21,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:56:21,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e589cde1f/cdbbf6ee3cf04f709c6cd4ee4812c436/FLAGf67ad5543 [2020-10-13 14:56:21,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e589cde1f/cdbbf6ee3cf04f709c6cd4ee4812c436 [2020-10-13 14:56:21,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:56:21,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:56:21,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:56:21,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:56:21,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:56:21,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:56:21" (1/1) ... [2020-10-13 14:56:21,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd7a508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:21, skipping insertion in model container [2020-10-13 14:56:21,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:56:21" (1/1) ... [2020-10-13 14:56:21,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:56:21,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:56:22,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:56:22,419 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:56:22,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:56:22,570 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:56:22,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22 WrapperNode [2020-10-13 14:56:22,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:56:22,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:56:22,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:56:22,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:56:22,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22" (1/1) ... [2020-10-13 14:56:22,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22" (1/1) ... [2020-10-13 14:56:22,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22" (1/1) ... [2020-10-13 14:56:22,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22" (1/1) ... [2020-10-13 14:56:22,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22" (1/1) ... [2020-10-13 14:56:22,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22" (1/1) ... [2020-10-13 14:56:22,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22" (1/1) ... [2020-10-13 14:56:22,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:56:22,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:56:22,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:56:22,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:56:22,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22" (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 [2020-10-13 14:56:22,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:56:22,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:56:22,750 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:56:22,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:56:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:56:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:56:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:56:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:56:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:56:22,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:56:22,753 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:56:22,753 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:56:22,753 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:56:22,753 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:56:22,753 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:56:22,754 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:56:22,754 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:56:22,755 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:56:22,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:56:22,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:56:22,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:56:23,810 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:56:23,810 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:56:23,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:56:23 BoogieIcfgContainer [2020-10-13 14:56:23,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:56:23,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:56:23,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:56:23,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:56:23,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:56:21" (1/3) ... [2020-10-13 14:56:23,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43905922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:56:23, skipping insertion in model container [2020-10-13 14:56:23,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:22" (2/3) ... [2020-10-13 14:56:23,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43905922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:56:23, skipping insertion in model container [2020-10-13 14:56:23,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:56:23" (3/3) ... [2020-10-13 14:56:23,824 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:56:23,834 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:56:23,846 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:56:23,858 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:56:23,880 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:56:23,880 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:56:23,881 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:56:23,881 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:56:23,881 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:56:23,881 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:56:23,881 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:56:23,881 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:56:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states. [2020-10-13 14:56:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 14:56:23,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:23,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:23,916 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash 907107443, now seen corresponding path program 1 times [2020-10-13 14:56:23,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:23,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421486475] [2020-10-13 14:56:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:24,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:24,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:24,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:25,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:25,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:25,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:26,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:26,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:28,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:28,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:28,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:28,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:29,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:29,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 14:56:29,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:56:29,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 14:56:29,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:29,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:29,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:56:29,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:56:29,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:56:29,909 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:56:29,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:29,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:29,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:29,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:29,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:29,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:56:29,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:29,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:29,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:29,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:29,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:30,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421486475] [2020-10-13 14:56:30,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:30,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:30,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489024089] [2020-10-13 14:56:30,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:30,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:30,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:30,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:30,058 INFO L87 Difference]: Start difference. First operand 252 states. Second operand 5 states. [2020-10-13 14:56:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:32,408 INFO L93 Difference]: Finished difference Result 721 states and 1255 transitions. [2020-10-13 14:56:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:56:32,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-10-13 14:56:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:32,428 INFO L225 Difference]: With dead ends: 721 [2020-10-13 14:56:32,428 INFO L226 Difference]: Without dead ends: 474 [2020-10-13 14:56:32,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:32,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-13 14:56:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 472. [2020-10-13 14:56:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-10-13 14:56:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 693 transitions. [2020-10-13 14:56:32,529 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 693 transitions. Word has length 105 [2020-10-13 14:56:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:32,530 INFO L479 AbstractCegarLoop]: Abstraction has 472 states and 693 transitions. [2020-10-13 14:56:32,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 693 transitions. [2020-10-13 14:56:32,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 14:56:32,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:32,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:32,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:56:32,542 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2024330401, now seen corresponding path program 1 times [2020-10-13 14:56:32,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:32,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700946311] [2020-10-13 14:56:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:32,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:32,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:32,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:32,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:34,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:36,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:37,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 14:56:37,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:56:37,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 14:56:37,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:37,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:37,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:56:37,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:56:37,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:38,017 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:56:38,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:38,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:38,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:38,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:38,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:38,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:56:38,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:38,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:38,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:38,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:38,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:38,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700946311] [2020-10-13 14:56:38,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:38,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:38,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752084599] [2020-10-13 14:56:38,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:38,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:38,095 INFO L87 Difference]: Start difference. First operand 472 states and 693 transitions. Second operand 4 states. [2020-10-13 14:56:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:40,565 INFO L93 Difference]: Finished difference Result 1370 states and 2009 transitions. [2020-10-13 14:56:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:40,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-13 14:56:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:40,572 INFO L225 Difference]: With dead ends: 1370 [2020-10-13 14:56:40,573 INFO L226 Difference]: Without dead ends: 930 [2020-10-13 14:56:40,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2020-10-13 14:56:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 474. [2020-10-13 14:56:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2020-10-13 14:56:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 695 transitions. [2020-10-13 14:56:40,648 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 695 transitions. Word has length 106 [2020-10-13 14:56:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:40,650 INFO L479 AbstractCegarLoop]: Abstraction has 474 states and 695 transitions. [2020-10-13 14:56:40,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 695 transitions. [2020-10-13 14:56:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 14:56:40,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:40,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:40,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:56:40,657 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash -120819274, now seen corresponding path program 1 times [2020-10-13 14:56:40,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:40,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662319015] [2020-10-13 14:56:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:40,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:40,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:40,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:40,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:41,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:41,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:42,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:42,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:45,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 14:56:45,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:56:45,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:56:45,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 14:56:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 14:56:45,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:46,020 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:56:46,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:46,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:46,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:46,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:56:46,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:46,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662319015] [2020-10-13 14:56:46,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:46,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:46,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197226373] [2020-10-13 14:56:46,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:46,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:46,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:46,063 INFO L87 Difference]: Start difference. First operand 474 states and 695 transitions. Second operand 4 states. [2020-10-13 14:56:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:47,417 INFO L93 Difference]: Finished difference Result 981 states and 1496 transitions. [2020-10-13 14:56:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:47,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-13 14:56:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:47,422 INFO L225 Difference]: With dead ends: 981 [2020-10-13 14:56:47,422 INFO L226 Difference]: Without dead ends: 638 [2020-10-13 14:56:47,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:47,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-10-13 14:56:47,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 622. [2020-10-13 14:56:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2020-10-13 14:56:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 939 transitions. [2020-10-13 14:56:47,456 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 939 transitions. Word has length 107 [2020-10-13 14:56:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:47,457 INFO L479 AbstractCegarLoop]: Abstraction has 622 states and 939 transitions. [2020-10-13 14:56:47,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 939 transitions. [2020-10-13 14:56:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 14:56:47,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:47,459 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:47,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:56:47,460 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash 557866376, now seen corresponding path program 1 times [2020-10-13 14:56:47,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:47,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372904] [2020-10-13 14:56:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:47,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:48,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:49,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:49,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:49,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:52,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:52,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 14:56:52,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:56:52,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:56:52,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:56:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:56:52,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:52,894 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:56:52,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:52,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:52,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:52,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:52,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:52,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:56:52,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:52,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:52,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:52,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372904] [2020-10-13 14:56:52,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:52,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:52,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606442882] [2020-10-13 14:56:52,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:52,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:52,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:52,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:52,993 INFO L87 Difference]: Start difference. First operand 622 states and 939 transitions. Second operand 5 states. [2020-10-13 14:56:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:55,215 INFO L93 Difference]: Finished difference Result 1733 states and 2607 transitions. [2020-10-13 14:56:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:55,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-13 14:56:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:55,223 INFO L225 Difference]: With dead ends: 1733 [2020-10-13 14:56:55,223 INFO L226 Difference]: Without dead ends: 1127 [2020-10-13 14:56:55,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2020-10-13 14:56:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1125. [2020-10-13 14:56:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1125 states. [2020-10-13 14:56:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1673 transitions. [2020-10-13 14:56:55,299 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1673 transitions. Word has length 107 [2020-10-13 14:56:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:55,300 INFO L479 AbstractCegarLoop]: Abstraction has 1125 states and 1673 transitions. [2020-10-13 14:56:55,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1673 transitions. [2020-10-13 14:56:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 14:56:55,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:55,302 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:55,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:56:55,303 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:55,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1243749010, now seen corresponding path program 1 times [2020-10-13 14:56:55,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:55,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798207725] [2020-10-13 14:56:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:55,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:56,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:00,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:00,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 14:57:00,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:57:00,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:57:00,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:00,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:00,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:57:00,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:57:00,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:00,633 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:57:00,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:00,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:00,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:00,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:00,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:00,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:57:00,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:00,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:00,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:00,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:00,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798207725] [2020-10-13 14:57:00,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:00,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:00,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664696490] [2020-10-13 14:57:00,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:00,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:00,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:00,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:00,674 INFO L87 Difference]: Start difference. First operand 1125 states and 1673 transitions. Second operand 5 states. [2020-10-13 14:57:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:01,772 INFO L93 Difference]: Finished difference Result 2007 states and 2989 transitions. [2020-10-13 14:57:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:01,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-13 14:57:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:01,778 INFO L225 Difference]: With dead ends: 2007 [2020-10-13 14:57:01,778 INFO L226 Difference]: Without dead ends: 916 [2020-10-13 14:57:01,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:01,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2020-10-13 14:57:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 915. [2020-10-13 14:57:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 915 states. [2020-10-13 14:57:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1363 transitions. [2020-10-13 14:57:01,835 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1363 transitions. Word has length 107 [2020-10-13 14:57:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:01,836 INFO L479 AbstractCegarLoop]: Abstraction has 915 states and 1363 transitions. [2020-10-13 14:57:01,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1363 transitions. [2020-10-13 14:57:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 14:57:01,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:01,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:01,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:57:01,838 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:01,839 INFO L82 PathProgramCache]: Analyzing trace with hash -437225458, now seen corresponding path program 1 times [2020-10-13 14:57:01,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:01,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109087857] [2020-10-13 14:57:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:01,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:06,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:06,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 14:57:06,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:57:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:57:06,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:57:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 14:57:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:07,115 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:57:07,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:07,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:07,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:07,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:07,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:07,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:07,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:07,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:07,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:07,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:07,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:07,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109087857] [2020-10-13 14:57:07,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:07,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:07,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061121504] [2020-10-13 14:57:07,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:07,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:07,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:07,161 INFO L87 Difference]: Start difference. First operand 915 states and 1363 transitions. Second operand 4 states. [2020-10-13 14:57:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:09,089 INFO L93 Difference]: Finished difference Result 2035 states and 3090 transitions. [2020-10-13 14:57:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:09,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-13 14:57:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:09,100 INFO L225 Difference]: With dead ends: 2035 [2020-10-13 14:57:09,100 INFO L226 Difference]: Without dead ends: 1408 [2020-10-13 14:57:09,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2020-10-13 14:57:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1406. [2020-10-13 14:57:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1406 states. [2020-10-13 14:57:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 2086 transitions. [2020-10-13 14:57:09,177 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 2086 transitions. Word has length 112 [2020-10-13 14:57:09,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:09,177 INFO L479 AbstractCegarLoop]: Abstraction has 1406 states and 2086 transitions. [2020-10-13 14:57:09,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:09,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 2086 transitions. [2020-10-13 14:57:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 14:57:09,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:09,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:09,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:57:09,182 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:09,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1559456388, now seen corresponding path program 1 times [2020-10-13 14:57:09,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:09,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426477556] [2020-10-13 14:57:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:09,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:13,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:13,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 14:57:13,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:57:13,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4687 [2020-10-13 14:57:13,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:13,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:13,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:57:13,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:57:13,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:14,164 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:57:14,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:14,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:14,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:14,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:14,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:14,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:14,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:14,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:14,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:14,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:14,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426477556] [2020-10-13 14:57:14,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:14,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:14,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784374046] [2020-10-13 14:57:14,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:14,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:14,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:14,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:14,214 INFO L87 Difference]: Start difference. First operand 1406 states and 2086 transitions. Second operand 5 states. [2020-10-13 14:57:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:16,349 INFO L93 Difference]: Finished difference Result 4000 states and 5935 transitions. [2020-10-13 14:57:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:16,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-13 14:57:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:16,366 INFO L225 Difference]: With dead ends: 4000 [2020-10-13 14:57:16,367 INFO L226 Difference]: Without dead ends: 2651 [2020-10-13 14:57:16,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2020-10-13 14:57:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2649. [2020-10-13 14:57:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2649 states. [2020-10-13 14:57:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3909 transitions. [2020-10-13 14:57:16,551 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3909 transitions. Word has length 112 [2020-10-13 14:57:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:16,551 INFO L479 AbstractCegarLoop]: Abstraction has 2649 states and 3909 transitions. [2020-10-13 14:57:16,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3909 transitions. [2020-10-13 14:57:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:57:16,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:16,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:16,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:57:16,556 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:16,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1584482978, now seen corresponding path program 1 times [2020-10-13 14:57:16,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:16,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295987272] [2020-10-13 14:57:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:16,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:16,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:16,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:16,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:19,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:57:19,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:57:19,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3156 [2020-10-13 14:57:19,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:19,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:19,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:57:19,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:57:19,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:19,941 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:57:19,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:19,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:19,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:19,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:19,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:19,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:19,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:19,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295987272] [2020-10-13 14:57:19,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:19,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:19,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938899546] [2020-10-13 14:57:19,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:19,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:19,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:19,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:19,973 INFO L87 Difference]: Start difference. First operand 2649 states and 3909 transitions. Second operand 4 states. [2020-10-13 14:57:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:21,897 INFO L93 Difference]: Finished difference Result 7743 states and 11456 transitions. [2020-10-13 14:57:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:21,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-10-13 14:57:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:21,920 INFO L225 Difference]: With dead ends: 7743 [2020-10-13 14:57:21,920 INFO L226 Difference]: Without dead ends: 5205 [2020-10-13 14:57:21,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5205 states. [2020-10-13 14:57:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5205 to 2655. [2020-10-13 14:57:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2655 states. [2020-10-13 14:57:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 3915 transitions. [2020-10-13 14:57:22,143 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 3915 transitions. Word has length 113 [2020-10-13 14:57:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:22,143 INFO L479 AbstractCegarLoop]: Abstraction has 2655 states and 3915 transitions. [2020-10-13 14:57:22,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 3915 transitions. [2020-10-13 14:57:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 14:57:22,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:22,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:22,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:57:22,147 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:22,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2113569869, now seen corresponding path program 1 times [2020-10-13 14:57:22,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:22,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21478269] [2020-10-13 14:57:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:22,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:23,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:23,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:23,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:23,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:25,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 14:57:25,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:57:25,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3653 [2020-10-13 14:57:25,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:25,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:25,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:57:25,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 14:57:25,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:26,092 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:57:26,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:26,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:26,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:26,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:26,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:26,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:57:26,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:26,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:26,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:26,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:26,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:26,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21478269] [2020-10-13 14:57:26,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:26,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:26,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477713521] [2020-10-13 14:57:26,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:26,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:26,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:26,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:26,125 INFO L87 Difference]: Start difference. First operand 2655 states and 3915 transitions. Second operand 4 states. [2020-10-13 14:57:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:28,033 INFO L93 Difference]: Finished difference Result 7152 states and 10640 transitions. [2020-10-13 14:57:28,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:28,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-10-13 14:57:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:28,053 INFO L225 Difference]: With dead ends: 7152 [2020-10-13 14:57:28,053 INFO L226 Difference]: Without dead ends: 5096 [2020-10-13 14:57:28,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2020-10-13 14:57:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 5094. [2020-10-13 14:57:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5094 states. [2020-10-13 14:57:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 7436 transitions. [2020-10-13 14:57:28,408 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 7436 transitions. Word has length 114 [2020-10-13 14:57:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:28,408 INFO L479 AbstractCegarLoop]: Abstraction has 5094 states and 7436 transitions. [2020-10-13 14:57:28,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 7436 transitions. [2020-10-13 14:57:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 14:57:28,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:28,414 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:28,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:57:28,415 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:28,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1414808368, now seen corresponding path program 1 times [2020-10-13 14:57:28,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:28,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775031938] [2020-10-13 14:57:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:28,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:33,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:33,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 14:57:33,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:57:33,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4675 [2020-10-13 14:57:33,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:33,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:33,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:57:33,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:57:33,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:33,386 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:57:33,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:33,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:33,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:33,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:33,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:33,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:33,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:33,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:33,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775031938] [2020-10-13 14:57:33,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:33,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:33,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745475849] [2020-10-13 14:57:33,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:33,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:33,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:33,415 INFO L87 Difference]: Start difference. First operand 5094 states and 7436 transitions. Second operand 5 states. [2020-10-13 14:57:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:34,989 INFO L93 Difference]: Finished difference Result 13085 states and 18952 transitions. [2020-10-13 14:57:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:34,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-10-13 14:57:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:35,019 INFO L225 Difference]: With dead ends: 13085 [2020-10-13 14:57:35,019 INFO L226 Difference]: Without dead ends: 8136 [2020-10-13 14:57:35,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8136 states. [2020-10-13 14:57:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8136 to 5156. [2020-10-13 14:57:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5156 states. [2020-10-13 14:57:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5156 states to 5156 states and 7516 transitions. [2020-10-13 14:57:35,502 INFO L78 Accepts]: Start accepts. Automaton has 5156 states and 7516 transitions. Word has length 114 [2020-10-13 14:57:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:35,502 INFO L479 AbstractCegarLoop]: Abstraction has 5156 states and 7516 transitions. [2020-10-13 14:57:35,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 5156 states and 7516 transitions. [2020-10-13 14:57:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 14:57:35,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:35,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:35,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:57:35,509 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:35,510 INFO L82 PathProgramCache]: Analyzing trace with hash 340779461, now seen corresponding path program 1 times [2020-10-13 14:57:35,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:35,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670065667] [2020-10-13 14:57:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:35,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:39,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 14:57:39,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:57:39,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4085 [2020-10-13 14:57:39,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:39,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 14:57:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 14:57:39,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:39,864 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:57:39,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:39,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:39,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:39,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:39,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:57:39,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:39,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:39,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670065667] [2020-10-13 14:57:39,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:39,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:39,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298983792] [2020-10-13 14:57:39,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:39,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:39,889 INFO L87 Difference]: Start difference. First operand 5156 states and 7516 transitions. Second operand 5 states. [2020-10-13 14:57:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:41,060 INFO L93 Difference]: Finished difference Result 10084 states and 14730 transitions. [2020-10-13 14:57:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:41,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-10-13 14:57:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:41,072 INFO L225 Difference]: With dead ends: 10084 [2020-10-13 14:57:41,072 INFO L226 Difference]: Without dead ends: 5128 [2020-10-13 14:57:41,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5128 states. [2020-10-13 14:57:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5128 to 5125. [2020-10-13 14:57:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5125 states. [2020-10-13 14:57:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 7456 transitions. [2020-10-13 14:57:41,356 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 7456 transitions. Word has length 114 [2020-10-13 14:57:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:41,356 INFO L479 AbstractCegarLoop]: Abstraction has 5125 states and 7456 transitions. [2020-10-13 14:57:41,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 7456 transitions. [2020-10-13 14:57:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 14:57:41,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:41,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:41,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:57:41,362 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:41,362 INFO L82 PathProgramCache]: Analyzing trace with hash 909593982, now seen corresponding path program 1 times [2020-10-13 14:57:41,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:41,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961905137] [2020-10-13 14:57:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:41,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:42,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:42,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:42,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:44,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:44,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 14:57:44,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:57:44,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3532 [2020-10-13 14:57:44,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:44,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:44,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 14:57:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:57:44,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:45,142 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:57:45,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:45,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:45,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:45,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:45,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:45,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:45,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:45,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:45,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:45,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:45,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:45,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961905137] [2020-10-13 14:57:45,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:45,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:45,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954649154] [2020-10-13 14:57:45,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:45,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:45,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:45,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:45,167 INFO L87 Difference]: Start difference. First operand 5125 states and 7456 transitions. Second operand 4 states. [2020-10-13 14:57:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:46,760 INFO L93 Difference]: Finished difference Result 10647 states and 16026 transitions. [2020-10-13 14:57:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:46,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-10-13 14:57:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:46,775 INFO L225 Difference]: With dead ends: 10647 [2020-10-13 14:57:46,776 INFO L226 Difference]: Without dead ends: 7261 [2020-10-13 14:57:46,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:46,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2020-10-13 14:57:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 7047. [2020-10-13 14:57:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7047 states. [2020-10-13 14:57:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 10504 transitions. [2020-10-13 14:57:47,280 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 10504 transitions. Word has length 114 [2020-10-13 14:57:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:47,281 INFO L479 AbstractCegarLoop]: Abstraction has 7047 states and 10504 transitions. [2020-10-13 14:57:47,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 10504 transitions. [2020-10-13 14:57:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 14:57:47,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:47,285 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:47,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:57:47,285 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:47,286 INFO L82 PathProgramCache]: Analyzing trace with hash 893822232, now seen corresponding path program 1 times [2020-10-13 14:57:47,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:47,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405984069] [2020-10-13 14:57:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:47,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:49,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:49,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:52,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:52,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 14:57:52,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:57:52,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4764 [2020-10-13 14:57:52,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:57:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:57:52,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:52,280 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:57:52,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:52,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:52,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:52,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:52,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:52,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:52,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:52,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:52,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:52,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:52,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:52,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405984069] [2020-10-13 14:57:52,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:52,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:52,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416941861] [2020-10-13 14:57:52,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:52,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:52,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:52,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:52,303 INFO L87 Difference]: Start difference. First operand 7047 states and 10504 transitions. Second operand 4 states. [2020-10-13 14:57:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:54,576 INFO L93 Difference]: Finished difference Result 20700 states and 30905 transitions. [2020-10-13 14:57:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:54,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-13 14:57:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:54,606 INFO L225 Difference]: With dead ends: 20700 [2020-10-13 14:57:54,607 INFO L226 Difference]: Without dead ends: 13909 [2020-10-13 14:57:54,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13909 states. [2020-10-13 14:57:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13909 to 7073. [2020-10-13 14:57:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7073 states. [2020-10-13 14:57:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7073 states to 7073 states and 10530 transitions. [2020-10-13 14:57:55,243 INFO L78 Accepts]: Start accepts. Automaton has 7073 states and 10530 transitions. Word has length 115 [2020-10-13 14:57:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:55,243 INFO L479 AbstractCegarLoop]: Abstraction has 7073 states and 10530 transitions. [2020-10-13 14:57:55,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7073 states and 10530 transitions. [2020-10-13 14:57:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 14:57:55,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:55,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:55,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:57:55,248 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:55,248 INFO L82 PathProgramCache]: Analyzing trace with hash 283929808, now seen corresponding path program 1 times [2020-10-13 14:57:55,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:55,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35061747] [2020-10-13 14:57:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:55,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:55,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:55,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:55,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:56,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:56,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:57,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:57,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:57,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:57,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:00,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:00,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 14:58:00,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:58:00,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:58:00,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 14:58:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:58:00,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:00,500 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:58:00,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:00,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:00,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:00,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:00,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:00,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:58:00,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:00,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:00,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:00,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:00,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:00,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35061747] [2020-10-13 14:58:00,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:00,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:58:00,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856739032] [2020-10-13 14:58:00,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:58:00,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:00,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:58:00,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:00,526 INFO L87 Difference]: Start difference. First operand 7073 states and 10530 transitions. Second operand 4 states. [2020-10-13 14:58:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:02,484 INFO L93 Difference]: Finished difference Result 17149 states and 26388 transitions. [2020-10-13 14:58:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:58:02,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-13 14:58:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:02,503 INFO L225 Difference]: With dead ends: 17149 [2020-10-13 14:58:02,503 INFO L226 Difference]: Without dead ends: 11297 [2020-10-13 14:58:02,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11297 states. [2020-10-13 14:58:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11297 to 10831. [2020-10-13 14:58:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10831 states. [2020-10-13 14:58:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10831 states to 10831 states and 16536 transitions. [2020-10-13 14:58:03,338 INFO L78 Accepts]: Start accepts. Automaton has 10831 states and 16536 transitions. Word has length 116 [2020-10-13 14:58:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:03,338 INFO L479 AbstractCegarLoop]: Abstraction has 10831 states and 16536 transitions. [2020-10-13 14:58:03,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 10831 states and 16536 transitions. [2020-10-13 14:58:03,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 14:58:03,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:03,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:03,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:58:03,342 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:03,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1296318929, now seen corresponding path program 1 times [2020-10-13 14:58:03,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:03,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110192961] [2020-10-13 14:58:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:03,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:03,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:03,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:03,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:03,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:03,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:05,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:05,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:05,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:05,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:05,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:08,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:08,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 14:58:08,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:58:08,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:58:08,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:58:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:58:08,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:08,609 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:58:08,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:08,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:08,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:08,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:08,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:08,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:08,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:08,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:08,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:08,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:08,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:08,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110192961] [2020-10-13 14:58:08,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:08,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:08,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908142974] [2020-10-13 14:58:08,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:08,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:08,640 INFO L87 Difference]: Start difference. First operand 10831 states and 16536 transitions. Second operand 5 states. [2020-10-13 14:58:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:11,275 INFO L93 Difference]: Finished difference Result 29613 states and 45078 transitions. [2020-10-13 14:58:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:11,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-13 14:58:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:11,304 INFO L225 Difference]: With dead ends: 29613 [2020-10-13 14:58:11,304 INFO L226 Difference]: Without dead ends: 18991 [2020-10-13 14:58:11,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18991 states. [2020-10-13 14:58:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18991 to 18983. [2020-10-13 14:58:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18983 states. [2020-10-13 14:58:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18983 states to 18983 states and 28541 transitions. [2020-10-13 14:58:12,690 INFO L78 Accepts]: Start accepts. Automaton has 18983 states and 28541 transitions. Word has length 116 [2020-10-13 14:58:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:12,690 INFO L479 AbstractCegarLoop]: Abstraction has 18983 states and 28541 transitions. [2020-10-13 14:58:12,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18983 states and 28541 transitions. [2020-10-13 14:58:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 14:58:12,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:12,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:12,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:58:12,696 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:12,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1663429138, now seen corresponding path program 1 times [2020-10-13 14:58:12,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:12,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585316545] [2020-10-13 14:58:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:12,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:14,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:14,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:17,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 14:58:17,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:58:17,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:58:17,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:17,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:17,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:58:17,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:58:17,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:17,974 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:58:17,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:17,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:17,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:17,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:17,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:17,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:17,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:17,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:17,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:17,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:18,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585316545] [2020-10-13 14:58:18,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:18,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:18,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434018641] [2020-10-13 14:58:18,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:18,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:18,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:18,002 INFO L87 Difference]: Start difference. First operand 18983 states and 28541 transitions. Second operand 5 states. [2020-10-13 14:58:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:20,071 INFO L93 Difference]: Finished difference Result 32873 states and 49766 transitions. [2020-10-13 14:58:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:20,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-13 14:58:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:20,091 INFO L225 Difference]: With dead ends: 32873 [2020-10-13 14:58:20,091 INFO L226 Difference]: Without dead ends: 15065 [2020-10-13 14:58:20,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15065 states. [2020-10-13 14:58:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15065 to 15047. [2020-10-13 14:58:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15047 states. [2020-10-13 14:58:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15047 states to 15047 states and 22576 transitions. [2020-10-13 14:58:21,026 INFO L78 Accepts]: Start accepts. Automaton has 15047 states and 22576 transitions. Word has length 116 [2020-10-13 14:58:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:21,026 INFO L479 AbstractCegarLoop]: Abstraction has 15047 states and 22576 transitions. [2020-10-13 14:58:21,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 15047 states and 22576 transitions. [2020-10-13 14:58:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 14:58:21,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:21,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:21,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:58:21,031 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:21,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1678448506, now seen corresponding path program 1 times [2020-10-13 14:58:21,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:21,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271054142] [2020-10-13 14:58:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:21,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:21,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:21,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:21,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:21,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:22,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:22,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:22,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:26,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:26,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 14:58:26,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:58:26,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:58:26,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:26,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:26,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 14:58:26,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 14:58:26,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:26,310 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:58:26,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:26,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:26,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:26,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:26,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:26,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:58:26,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:26,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:26,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271054142] [2020-10-13 14:58:26,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:26,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:26,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787019742] [2020-10-13 14:58:26,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:26,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:26,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:26,348 INFO L87 Difference]: Start difference. First operand 15047 states and 22576 transitions. Second operand 5 states. [2020-10-13 14:58:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:27,985 INFO L93 Difference]: Finished difference Result 22992 states and 34657 transitions. [2020-10-13 14:58:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:27,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-13 14:58:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:28,004 INFO L225 Difference]: With dead ends: 22992 [2020-10-13 14:58:28,004 INFO L226 Difference]: Without dead ends: 12766 [2020-10-13 14:58:28,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12766 states. [2020-10-13 14:58:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12766 to 12752. [2020-10-13 14:58:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12752 states. [2020-10-13 14:58:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 19086 transitions. [2020-10-13 14:58:28,816 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 19086 transitions. Word has length 121 [2020-10-13 14:58:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:28,817 INFO L479 AbstractCegarLoop]: Abstraction has 12752 states and 19086 transitions. [2020-10-13 14:58:28,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 19086 transitions. [2020-10-13 14:58:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 14:58:28,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:28,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:28,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:58:28,820 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1343154007, now seen corresponding path program 1 times [2020-10-13 14:58:28,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:28,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898693186] [2020-10-13 14:58:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:28,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:28,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:28,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:29,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:29,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:29,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:31,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 14:58:31,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:58:31,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2298 [2020-10-13 14:58:31,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:31,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:31,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:58:31,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 14:58:31,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:31,410 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:58:31,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:31,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:31,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:31,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:31,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:31,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:31,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:31,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:31,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:31,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:31,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898693186] [2020-10-13 14:58:31,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:31,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:31,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424541047] [2020-10-13 14:58:31,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:31,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:31,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:31,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:31,445 INFO L87 Difference]: Start difference. First operand 12752 states and 19086 transitions. Second operand 5 states. [2020-10-13 14:58:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:33,956 INFO L93 Difference]: Finished difference Result 20184 states and 30532 transitions. [2020-10-13 14:58:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:33,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-13 14:58:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:33,969 INFO L225 Difference]: With dead ends: 20184 [2020-10-13 14:58:33,969 INFO L226 Difference]: Without dead ends: 12013 [2020-10-13 14:58:33,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:33,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12013 states. [2020-10-13 14:58:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12013 to 11741. [2020-10-13 14:58:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11741 states. [2020-10-13 14:58:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11741 states to 11741 states and 17582 transitions. [2020-10-13 14:58:34,899 INFO L78 Accepts]: Start accepts. Automaton has 11741 states and 17582 transitions. Word has length 122 [2020-10-13 14:58:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:34,900 INFO L479 AbstractCegarLoop]: Abstraction has 11741 states and 17582 transitions. [2020-10-13 14:58:34,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 11741 states and 17582 transitions. [2020-10-13 14:58:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 14:58:34,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:34,903 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:34,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:58:34,904 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:34,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:34,904 INFO L82 PathProgramCache]: Analyzing trace with hash -173677942, now seen corresponding path program 1 times [2020-10-13 14:58:34,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:34,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162016867] [2020-10-13 14:58:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:34,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:34,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:35,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:35,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:35,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:36,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 14:58:36,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:58:36,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-13 14:58:36,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:58:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:58:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 14:58:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:36,399 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:58:36,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:36,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:36,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:36,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:58:36,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:58:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:36,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162016867] [2020-10-13 14:58:36,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:36,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:36,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518148564] [2020-10-13 14:58:36,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:58:36,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:36,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:58:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:36,437 INFO L87 Difference]: Start difference. First operand 11741 states and 17582 transitions. Second operand 6 states. [2020-10-13 14:58:36,685 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 14:58:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:39,788 INFO L93 Difference]: Finished difference Result 32155 states and 49082 transitions. [2020-10-13 14:58:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:58:39,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2020-10-13 14:58:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:39,811 INFO L225 Difference]: With dead ends: 32155 [2020-10-13 14:58:39,811 INFO L226 Difference]: Without dead ends: 21461 [2020-10-13 14:58:39,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:58:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21461 states. [2020-10-13 14:58:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21461 to 21459. [2020-10-13 14:58:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21459 states. [2020-10-13 14:58:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21459 states to 21459 states and 32555 transitions. [2020-10-13 14:58:41,398 INFO L78 Accepts]: Start accepts. Automaton has 21459 states and 32555 transitions. Word has length 124 [2020-10-13 14:58:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:41,398 INFO L479 AbstractCegarLoop]: Abstraction has 21459 states and 32555 transitions. [2020-10-13 14:58:41,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:58:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 21459 states and 32555 transitions. [2020-10-13 14:58:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 14:58:41,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:41,402 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:41,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:58:41,403 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash 987464975, now seen corresponding path program 1 times [2020-10-13 14:58:41,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:41,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164473215] [2020-10-13 14:58:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:41,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:41,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 14:58:41,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:58:41,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-13 14:58:41,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:41,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:41,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:58:41,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 14:58:41,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:42,109 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:58:42,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:42,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:42,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:42,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:42,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:42,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:42,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:42,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:42,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:42,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164473215] [2020-10-13 14:58:42,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:42,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:42,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645330245] [2020-10-13 14:58:42,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:42,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:42,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:42,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:42,158 INFO L87 Difference]: Start difference. First operand 21459 states and 32555 transitions. Second operand 5 states. [2020-10-13 14:58:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:44,895 INFO L93 Difference]: Finished difference Result 35282 states and 53646 transitions. [2020-10-13 14:58:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:44,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-13 14:58:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:44,918 INFO L225 Difference]: With dead ends: 35282 [2020-10-13 14:58:44,918 INFO L226 Difference]: Without dead ends: 20048 [2020-10-13 14:58:44,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20048 states. [2020-10-13 14:58:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20048 to 19818. [2020-10-13 14:58:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19818 states. [2020-10-13 14:58:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19818 states to 19818 states and 30006 transitions. [2020-10-13 14:58:46,621 INFO L78 Accepts]: Start accepts. Automaton has 19818 states and 30006 transitions. Word has length 124 [2020-10-13 14:58:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:46,621 INFO L479 AbstractCegarLoop]: Abstraction has 19818 states and 30006 transitions. [2020-10-13 14:58:46,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 19818 states and 30006 transitions. [2020-10-13 14:58:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 14:58:46,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:46,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:46,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:58:46,625 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:46,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:46,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2073915994, now seen corresponding path program 1 times [2020-10-13 14:58:46,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:46,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747209207] [2020-10-13 14:58:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:46,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:47,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:47,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:47,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:51,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:51,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:51,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 14:58:51,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:58:51,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:58:51,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:51,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:51,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 14:58:51,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:58:51,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:51,884 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:58:51,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:51,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:51,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:51,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:51,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:51,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:51,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:51,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:51,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747209207] [2020-10-13 14:58:51,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:51,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:51,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98958884] [2020-10-13 14:58:51,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:51,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:51,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:51,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:51,913 INFO L87 Difference]: Start difference. First operand 19818 states and 30006 transitions. Second operand 5 states. [2020-10-13 14:58:52,135 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:58:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:58,041 INFO L93 Difference]: Finished difference Result 73269 states and 113135 transitions. [2020-10-13 14:58:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:58:58,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-13 14:58:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:58,104 INFO L225 Difference]: With dead ends: 73269 [2020-10-13 14:58:58,105 INFO L226 Difference]: Without dead ends: 55206 [2020-10-13 14:58:58,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55206 states. [2020-10-13 14:59:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55206 to 55202. [2020-10-13 14:59:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55202 states. [2020-10-13 14:59:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55202 states to 55202 states and 84814 transitions. [2020-10-13 14:59:03,870 INFO L78 Accepts]: Start accepts. Automaton has 55202 states and 84814 transitions. Word has length 126 [2020-10-13 14:59:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:03,870 INFO L479 AbstractCegarLoop]: Abstraction has 55202 states and 84814 transitions. [2020-10-13 14:59:03,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 55202 states and 84814 transitions. [2020-10-13 14:59:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 14:59:03,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:03,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:03,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:59:03,875 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:03,876 INFO L82 PathProgramCache]: Analyzing trace with hash 434970117, now seen corresponding path program 1 times [2020-10-13 14:59:03,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:03,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643979343] [2020-10-13 14:59:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:03,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:03,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:04,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:06,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:06,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:06,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:06,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:08,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:08,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 14:59:08,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:59:08,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:59:08,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:08,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:08,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 14:59:08,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:59:08,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:09,128 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:59:09,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:09,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:09,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:09,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:09,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:09,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:59:09,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:09,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:09,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643979343] [2020-10-13 14:59:09,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:09,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:09,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130742737] [2020-10-13 14:59:09,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:09,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:09,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:09,156 INFO L87 Difference]: Start difference. First operand 55202 states and 84814 transitions. Second operand 4 states. [2020-10-13 14:59:09,381 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:59:20,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:20,096 INFO L93 Difference]: Finished difference Result 158622 states and 246312 transitions. [2020-10-13 14:59:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:20,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-10-13 14:59:20,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:20,247 INFO L225 Difference]: With dead ends: 158622 [2020-10-13 14:59:20,248 INFO L226 Difference]: Without dead ends: 106912 [2020-10-13 14:59:20,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106912 states. [2020-10-13 14:59:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106912 to 106766. [2020-10-13 14:59:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106766 states. [2020-10-13 14:59:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106766 states to 106766 states and 162790 transitions. [2020-10-13 14:59:32,160 INFO L78 Accepts]: Start accepts. Automaton has 106766 states and 162790 transitions. Word has length 126 [2020-10-13 14:59:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:32,161 INFO L479 AbstractCegarLoop]: Abstraction has 106766 states and 162790 transitions. [2020-10-13 14:59:32,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 106766 states and 162790 transitions. [2020-10-13 14:59:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 14:59:32,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:32,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:32,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:59:32,165 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash 459699290, now seen corresponding path program 1 times [2020-10-13 14:59:32,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:32,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138681468] [2020-10-13 14:59:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:32,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:32,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:32,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 14:59:32,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-13 14:59:32,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:59:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:59:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 14:59:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:32,962 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:59:32,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:32,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:32,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:32,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:32,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:32,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:59:32,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:32,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:32,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:32,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:59:32,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:33,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138681468] [2020-10-13 14:59:33,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:33,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:33,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018104369] [2020-10-13 14:59:33,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:59:33,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:59:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:33,005 INFO L87 Difference]: Start difference. First operand 106766 states and 162790 transitions. Second operand 6 states. [2020-10-13 14:59:33,253 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 14:59:57,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:57,203 INFO L93 Difference]: Finished difference Result 315172 states and 481366 transitions. [2020-10-13 14:59:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:59:57,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-10-13 14:59:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:57,522 INFO L225 Difference]: With dead ends: 315172 [2020-10-13 14:59:57,522 INFO L226 Difference]: Without dead ends: 209704 [2020-10-13 14:59:57,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:59:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209704 states.