/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 SingleStatement --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:36:57,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:36:57,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:36:58,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:36:58,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:36:58,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:36:58,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:36:58,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:36:58,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:36:58,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:36:58,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:36:58,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:36:58,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:36:58,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:36:58,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:36:58,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:36:58,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:36:58,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:36:58,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:36:58,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:36:58,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:36:58,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:36:58,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:36:58,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:36:58,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:36:58,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:36:58,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:36:58,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:36:58,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:36:58,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:36:58,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:36:58,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:36:58,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:36:58,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:36:58,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:36:58,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:36:58,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:36:58,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:36:58,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:36:58,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:36:58,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:36:58,081 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 [2020-09-24 19:36:58,118 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:36:58,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:36:58,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:36:58,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:36:58,120 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:36:58,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:36:58,120 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:36:58,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:36:58,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:36:58,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:36:58,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:36:58,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:36:58,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:36:58,122 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:36:58,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:36:58,122 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:36:58,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:36:58,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:36:58,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:36:58,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:36:58,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:36:58,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:36:58,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:36:58,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:36:58,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:36:58,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:36:58,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:36:58,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:36:58,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:36:58,125 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 -> SingleStatement 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:36:58,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:36:58,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:36:58,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:36:58,622 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:36:58,623 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:36:58,624 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 19:36:58,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa141e022/65189d47b66944c5a8439cb93426f1ca/FLAG8c935f8f1 [2020-09-24 19:36:59,375 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:36:59,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 19:36:59,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa141e022/65189d47b66944c5a8439cb93426f1ca/FLAG8c935f8f1 [2020-09-24 19:36:59,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa141e022/65189d47b66944c5a8439cb93426f1ca [2020-09-24 19:36:59,621 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:36:59,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:36:59,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:36:59,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:36:59,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:36:59,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:36:59" (1/1) ... [2020-09-24 19:36:59,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b134fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:59, skipping insertion in model container [2020-09-24 19:36:59,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:36:59" (1/1) ... [2020-09-24 19:36:59,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:36:59,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:37:00,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:37:00,359 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:37:00,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:37:00,828 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:37:00,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00 WrapperNode [2020-09-24 19:37:00,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:37:00,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:37:00,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:37:00,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:37:00,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:00,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:00,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:00,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:00,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:00,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:00,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:00,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:37:00,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:37:00,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:37:00,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:37:00,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00" (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 [2020-09-24 19:37:01,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:37:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:37:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:37:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:37:01,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:37:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 19:37:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 19:37:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 19:37:01,100 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:37:01,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:37:01,101 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 19:37:01,101 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 19:37:01,101 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 19:37:01,101 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 19:37:01,102 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 19:37:01,103 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 19:37:01,103 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 19:37:01,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:37:01,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:37:01,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:37:03,010 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:37:03,010 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:37:03,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:37:03 BoogieIcfgContainer [2020-09-24 19:37:03,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:37:03,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:37:03,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:37:03,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:37:03,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:36:59" (1/3) ... [2020-09-24 19:37:03,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4708a51e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:37:03, skipping insertion in model container [2020-09-24 19:37:03,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00" (2/3) ... [2020-09-24 19:37:03,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4708a51e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:37:03, skipping insertion in model container [2020-09-24 19:37:03,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:37:03" (3/3) ... [2020-09-24 19:37:03,043 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 19:37:03,056 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:37:03,068 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:37:03,091 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:37:03,124 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:37:03,125 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:37:03,125 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:37:03,125 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:37:03,125 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:37:03,125 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:37:03,125 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:37:03,126 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:37:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states. [2020-09-24 19:37:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-24 19:37:03,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:03,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:37:03,206 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:03,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:03,215 INFO L82 PathProgramCache]: Analyzing trace with hash 752602954, now seen corresponding path program 1 times [2020-09-24 19:37:03,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:03,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526010375] [2020-09-24 19:37:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:04,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:04,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:04,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:04,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:05,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-24 19:37:05,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:37:05,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-09-24 19:37:05,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:05,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-09-24 19:37:05,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-24 19:37:05,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:37:05,838 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 19:37:05,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:05,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:05,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 19:37:05,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:05,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-24 19:37:05,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:05,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:05,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:05,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:05,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:06,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526010375] [2020-09-24 19:37:06,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:06,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:06,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479059008] [2020-09-24 19:37:06,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:06,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:06,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:06,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:06,613 INFO L87 Difference]: Start difference. First operand 912 states. Second operand 4 states. [2020-09-24 19:37:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:10,357 INFO L93 Difference]: Finished difference Result 1664 states and 2163 transitions. [2020-09-24 19:37:10,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:10,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-24 19:37:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:10,396 INFO L225 Difference]: With dead ends: 1664 [2020-09-24 19:37:10,396 INFO L226 Difference]: Without dead ends: 1251 [2020-09-24 19:37:10,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-09-24 19:37:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1244. [2020-09-24 19:37:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2020-09-24 19:37:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1517 transitions. [2020-09-24 19:37:10,548 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1517 transitions. Word has length 460 [2020-09-24 19:37:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:10,550 INFO L479 AbstractCegarLoop]: Abstraction has 1244 states and 1517 transitions. [2020-09-24 19:37:10,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1517 transitions. [2020-09-24 19:37:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-24 19:37:10,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:10,566 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:37:10,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:37:10,567 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1495383786, now seen corresponding path program 1 times [2020-09-24 19:37:10,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:10,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213732035] [2020-09-24 19:37:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:10,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:10,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:11,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:11,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:11,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:11,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:11,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:11,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-24 19:37:11,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:37:11,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-09-24 19:37:11,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:11,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:11,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-09-24 19:37:11,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-09-24 19:37:11,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:12,180 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 19:37:12,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:12,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:12,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 19:37:12,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:12,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 19:37:12,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:12,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:12,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213732035] [2020-09-24 19:37:12,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:12,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:12,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836282533] [2020-09-24 19:37:12,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:12,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:12,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:12,725 INFO L87 Difference]: Start difference. First operand 1244 states and 1517 transitions. Second operand 4 states. [2020-09-24 19:37:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:15,845 INFO L93 Difference]: Finished difference Result 2510 states and 3146 transitions. [2020-09-24 19:37:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:15,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-24 19:37:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:15,864 INFO L225 Difference]: With dead ends: 2510 [2020-09-24 19:37:15,864 INFO L226 Difference]: Without dead ends: 2066 [2020-09-24 19:37:15,870 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 [2020-09-24 19:37:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2020-09-24 19:37:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2054. [2020-09-24 19:37:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2054 states. [2020-09-24 19:37:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2545 transitions. [2020-09-24 19:37:15,936 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2545 transitions. Word has length 460 [2020-09-24 19:37:15,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:15,938 INFO L479 AbstractCegarLoop]: Abstraction has 2054 states and 2545 transitions. [2020-09-24 19:37:15,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2545 transitions. [2020-09-24 19:37:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-24 19:37:15,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:15,951 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:37:15,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:37:15,951 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:15,952 INFO L82 PathProgramCache]: Analyzing trace with hash -863833942, now seen corresponding path program 1 times [2020-09-24 19:37:15,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:15,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968956349] [2020-09-24 19:37:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:16,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:16,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:16,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:16,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:16,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:17,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:17,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:17,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-24 19:37:17,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:37:17,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-09-24 19:37:17,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-24 19:37:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-24 19:37:17,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:17,550 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 19:37:17,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:17,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:17,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 19:37:17,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:17,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 19:37:17,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:17,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:17,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:17,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968956349] [2020-09-24 19:37:17,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:17,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:17,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654812378] [2020-09-24 19:37:17,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:17,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:17,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:17,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:17,991 INFO L87 Difference]: Start difference. First operand 2054 states and 2545 transitions. Second operand 4 states. [2020-09-24 19:37:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:20,745 INFO L93 Difference]: Finished difference Result 4382 states and 5559 transitions. [2020-09-24 19:37:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:20,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-24 19:37:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:20,764 INFO L225 Difference]: With dead ends: 4382 [2020-09-24 19:37:20,764 INFO L226 Difference]: Without dead ends: 3596 [2020-09-24 19:37:20,768 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 [2020-09-24 19:37:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2020-09-24 19:37:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3574. [2020-09-24 19:37:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3574 states. [2020-09-24 19:37:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 4481 transitions. [2020-09-24 19:37:20,870 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 4481 transitions. Word has length 460 [2020-09-24 19:37:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:20,871 INFO L479 AbstractCegarLoop]: Abstraction has 3574 states and 4481 transitions. [2020-09-24 19:37:20,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 4481 transitions. [2020-09-24 19:37:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-24 19:37:20,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:20,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:37:20,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:37:20,881 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:20,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:20,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1795052938, now seen corresponding path program 1 times [2020-09-24 19:37:20,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:20,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004310896] [2020-09-24 19:37:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:21,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:21,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:21,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:21,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:22,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:22,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-24 19:37:22,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:37:22,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-24 19:37:22,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:22,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:37:22,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-24 19:37:22,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-24 19:37:22,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:22,574 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 19:37:22,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:22,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:22,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:22,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 19:37:22,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:22,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 19:37:22,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:22,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:22,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:22,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:37:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:23,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004310896] [2020-09-24 19:37:23,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:23,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:37:23,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242360885] [2020-09-24 19:37:23,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:37:23,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:23,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:37:23,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:37:23,161 INFO L87 Difference]: Start difference. First operand 3574 states and 4481 transitions. Second operand 5 states. [2020-09-24 19:37:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:27,924 INFO L93 Difference]: Finished difference Result 10121 states and 12748 transitions. [2020-09-24 19:37:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:37:27,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 460 [2020-09-24 19:37:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:27,958 INFO L225 Difference]: With dead ends: 10121 [2020-09-24 19:37:27,959 INFO L226 Difference]: Without dead ends: 6748 [2020-09-24 19:37:27,965 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 [2020-09-24 19:37:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2020-09-24 19:37:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6746. [2020-09-24 19:37:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6746 states. [2020-09-24 19:37:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6746 states to 6746 states and 8441 transitions. [2020-09-24 19:37:28,222 INFO L78 Accepts]: Start accepts. Automaton has 6746 states and 8441 transitions. Word has length 460 [2020-09-24 19:37:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:28,223 INFO L479 AbstractCegarLoop]: Abstraction has 6746 states and 8441 transitions. [2020-09-24 19:37:28,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:37:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 6746 states and 8441 transitions. [2020-09-24 19:37:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-09-24 19:37:28,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:28,236 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:37:28,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:37:28,237 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1978917356, now seen corresponding path program 1 times [2020-09-24 19:37:28,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:28,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988120227] [2020-09-24 19:37:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:28,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:28,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:28,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:28,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:29,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:29,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:29,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 468 [2020-09-24 19:37:29,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:37:29,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-24 19:37:29,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:29,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:29,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-09-24 19:37:29,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 19:37:29,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:29,607 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 19:37:29,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:29,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:29,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 19:37:29,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:29,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-24 19:37:29,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:29,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:29,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:29,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:29,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988120227] [2020-09-24 19:37:29,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:29,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:29,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174671849] [2020-09-24 19:37:29,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:29,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:29,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:29,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:29,940 INFO L87 Difference]: Start difference. First operand 6746 states and 8441 transitions. Second operand 4 states. [2020-09-24 19:37:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:33,116 INFO L93 Difference]: Finished difference Result 19843 states and 24907 transitions. [2020-09-24 19:37:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:33,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 461 [2020-09-24 19:37:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:33,171 INFO L225 Difference]: With dead ends: 19843 [2020-09-24 19:37:33,171 INFO L226 Difference]: Without dead ends: 13303 [2020-09-24 19:37:33,187 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 [2020-09-24 19:37:33,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13303 states. [2020-09-24 19:37:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13303 to 6749. [2020-09-24 19:37:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6749 states. [2020-09-24 19:37:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8445 transitions. [2020-09-24 19:37:33,560 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8445 transitions. Word has length 461 [2020-09-24 19:37:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:33,561 INFO L479 AbstractCegarLoop]: Abstraction has 6749 states and 8445 transitions. [2020-09-24 19:37:33,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8445 transitions. [2020-09-24 19:37:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-09-24 19:37:33,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:33,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:37:33,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:37:33,577 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:33,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1306220179, now seen corresponding path program 1 times [2020-09-24 19:37:33,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:33,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790061098] [2020-09-24 19:37:33,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:33,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:33,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:33,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:34,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:34,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:34,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:34,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:34,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-09-24 19:37:34,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:37:34,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-09-24 19:37:34,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 183 [2020-09-24 19:37:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 19:37:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:35,016 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 19:37:35,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:35,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:35,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:35,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 19:37:35,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:35,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 19:37:35,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:35,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:35,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:35,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:35,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:35,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790061098] [2020-09-24 19:37:35,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:35,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:35,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647902144] [2020-09-24 19:37:35,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:35,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:35,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:35,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:35,322 INFO L87 Difference]: Start difference. First operand 6749 states and 8445 transitions. Second operand 4 states. [2020-09-24 19:37:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:40,287 INFO L93 Difference]: Finished difference Result 17862 states and 22381 transitions. [2020-09-24 19:37:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:40,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 462 [2020-09-24 19:37:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:40,317 INFO L225 Difference]: With dead ends: 17862 [2020-09-24 19:37:40,317 INFO L226 Difference]: Without dead ends: 11532 [2020-09-24 19:37:40,331 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 [2020-09-24 19:37:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11532 states. [2020-09-24 19:37:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11532 to 11530. [2020-09-24 19:37:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11530 states. [2020-09-24 19:37:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11530 states to 11530 states and 14337 transitions. [2020-09-24 19:37:40,741 INFO L78 Accepts]: Start accepts. Automaton has 11530 states and 14337 transitions. Word has length 462 [2020-09-24 19:37:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:40,742 INFO L479 AbstractCegarLoop]: Abstraction has 11530 states and 14337 transitions. [2020-09-24 19:37:40,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 11530 states and 14337 transitions. [2020-09-24 19:37:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-09-24 19:37:40,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:40,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:37:40,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:37:40,765 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:40,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:40,765 INFO L82 PathProgramCache]: Analyzing trace with hash -788076051, now seen corresponding path program 1 times [2020-09-24 19:37:40,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:40,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888868598] [2020-09-24 19:37:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:40,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:41,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:41,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:41,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:41,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:41,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:41,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:41,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:41,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-09-24 19:37:41,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:37:41,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-09-24 19:37:41,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:41,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:37:41,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-09-24 19:37:41,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:37:41,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:42,334 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 19:37:42,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:42,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:42,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:42,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 19:37:42,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 19:37:42,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:42,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:42,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:42,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:42,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:42,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888868598] [2020-09-24 19:37:42,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:42,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:37:42,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69187019] [2020-09-24 19:37:42,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:37:42,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:42,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:37:42,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:37:42,687 INFO L87 Difference]: Start difference. First operand 11530 states and 14337 transitions. Second operand 5 states. [2020-09-24 19:37:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:46,404 INFO L93 Difference]: Finished difference Result 29544 states and 36772 transitions. [2020-09-24 19:37:46,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:37:46,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 462 [2020-09-24 19:37:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:46,439 INFO L225 Difference]: With dead ends: 29544 [2020-09-24 19:37:46,440 INFO L226 Difference]: Without dead ends: 18248 [2020-09-24 19:37:46,462 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 [2020-09-24 19:37:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18248 states. [2020-09-24 19:37:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18248 to 11546. [2020-09-24 19:37:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11546 states. [2020-09-24 19:37:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11546 states to 11546 states and 14355 transitions. [2020-09-24 19:37:46,865 INFO L78 Accepts]: Start accepts. Automaton has 11546 states and 14355 transitions. Word has length 462 [2020-09-24 19:37:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:46,866 INFO L479 AbstractCegarLoop]: Abstraction has 11546 states and 14355 transitions. [2020-09-24 19:37:46,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:37:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 11546 states and 14355 transitions. [2020-09-24 19:37:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-09-24 19:37:46,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:46,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:37:46,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:37:46,887 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:46,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1929671204, now seen corresponding path program 1 times [2020-09-24 19:37:46,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:46,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021675140] [2020-09-24 19:37:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:47,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:47,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:48,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:48,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-09-24 19:37:48,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:37:48,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-09-24 19:37:48,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:37:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-09-24 19:37:48,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 19:37:48,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:48,510 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-24 19:37:48,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:48,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:48,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 19:37:48,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:48,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 19:37:48,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:48,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:48,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:48,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:48,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:48,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021675140] [2020-09-24 19:37:48,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:48,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:37:48,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718011844] [2020-09-24 19:37:48,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:37:48,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:48,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:37:48,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:37:48,818 INFO L87 Difference]: Start difference. First operand 11546 states and 14355 transitions. Second operand 5 states.