/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:58:13,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:58:13,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:58:13,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:58:13,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:58:13,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:58:13,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:58:13,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:58:13,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:58:13,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:58:13,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:58:13,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:58:13,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:58:13,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:58:13,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:58:13,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:58:13,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:58:13,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:58:13,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:58:13,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:58:13,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:58:13,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:58:13,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:58:13,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:58:13,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:58:13,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:58:13,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:58:13,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:58:13,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:58:13,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:58:13,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:58:13,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:58:13,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:58:13,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:58:13,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:58:13,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:58:13,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:58:13,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:58:13,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:58:13,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:58:13,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:58:13,611 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 22:58:13,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:58:13,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:58:13,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:58:13,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:58:13,657 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:58:13,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:58:13,657 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:58:13,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:58:13,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:58:13,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:58:13,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:58:13,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:58:13,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:58:13,660 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:58:13,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:58:13,660 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:58:13,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:58:13,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:58:13,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:58:13,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:58:13,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:58:13,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:58:13,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:58:13,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:58:13,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:58:13,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:58:13,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:58:13,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:58:13,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:58:13,663 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=5000;interpolation-heuristic=HIGHLEXORDER;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=5000;interpolation-heuristic=HIGHLEXORDER;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=5000;interpolation-heuristic=HIGHLEXORDER;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=5000;interpolation-heuristic=HIGHLEXORDER;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=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:58:14,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:58:14,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:58:14,149 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:58:14,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:58:14,152 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:58:14,153 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 22:58:14,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29901c778/24b6d8099ad24a9abe9a025bb0a344bd/FLAG1c1027eb6 [2020-09-24 22:58:14,807 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:58:14,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 22:58:14,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29901c778/24b6d8099ad24a9abe9a025bb0a344bd/FLAG1c1027eb6 [2020-09-24 22:58:15,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29901c778/24b6d8099ad24a9abe9a025bb0a344bd [2020-09-24 22:58:15,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:58:15,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:58:15,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:58:15,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:58:15,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:58:15,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:15" (1/1) ... [2020-09-24 22:58:15,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a35e781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15, skipping insertion in model container [2020-09-24 22:58:15,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:58:15" (1/1) ... [2020-09-24 22:58:15,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:58:15,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:58:15,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:58:15,781 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:58:15,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:58:15,983 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:58:15,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15 WrapperNode [2020-09-24 22:58:15,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:58:15,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:58:15,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:58:15,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:58:15,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15" (1/1) ... [2020-09-24 22:58:16,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15" (1/1) ... [2020-09-24 22:58:16,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15" (1/1) ... [2020-09-24 22:58:16,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15" (1/1) ... [2020-09-24 22:58:16,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15" (1/1) ... [2020-09-24 22:58:16,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15" (1/1) ... [2020-09-24 22:58:16,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15" (1/1) ... [2020-09-24 22:58:16,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:58:16,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:58:16,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:58:16,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:58:16,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15" (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 22:58:16,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:58:16,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:58:16,177 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 22:58:16,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:58:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:58:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 22:58:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 22:58:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 22:58:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 22:58:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 22:58:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 22:58:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 22:58:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 22:58:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 22:58:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 22:58:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 22:58:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 22:58:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:58:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:58:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:58:17,692 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:58:17,692 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 22:58:17,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:58:17 BoogieIcfgContainer [2020-09-24 22:58:17,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:58:17,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:58:17,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:58:17,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:58:17,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:58:15" (1/3) ... [2020-09-24 22:58:17,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c68117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:58:17, skipping insertion in model container [2020-09-24 22:58:17,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:58:15" (2/3) ... [2020-09-24 22:58:17,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c68117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:58:17, skipping insertion in model container [2020-09-24 22:58:17,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:58:17" (3/3) ... [2020-09-24 22:58:17,716 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 22:58:17,728 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:58:17,746 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:58:17,768 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:58:17,811 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:58:17,812 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:58:17,812 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:58:17,812 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:58:17,812 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:58:17,812 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:58:17,812 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:58:17,813 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:58:17,854 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-24 22:58:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-24 22:58:17,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:58:17,885 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] [2020-09-24 22:58:17,886 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:58:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:58:17,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-24 22:58:17,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:58:17,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295376483] [2020-09-24 22:58:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:58:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:18,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:19,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:19,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:19,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:19,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:19,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:20,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:23,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:23,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-24 22:58:23,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 22:58:23,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-09-24 22:58:23,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:23,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:58:23,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-09-24 22:58:23,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-24 22:58:23,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:58:24,006 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 22:58:24,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:58:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:24,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:24,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:24,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 22:58:24,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:58:24,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 22:58:24,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:58:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:58:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:58:24,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:58:24,305 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 22:58:24,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295376483] [2020-09-24 22:58:24,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:58:24,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:58:24,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693386552] [2020-09-24 22:58:24,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:58:24,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:58:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:58:24,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:58:24,348 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 4 states. [2020-09-24 22:58:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:58:27,470 INFO L93 Difference]: Finished difference Result 1488 states and 1948 transitions. [2020-09-24 22:58:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:58:27,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-24 22:58:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:58:27,502 INFO L225 Difference]: With dead ends: 1488 [2020-09-24 22:58:27,503 INFO L226 Difference]: Without dead ends: 1109 [2020-09-24 22:58:27,512 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 22:58:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-09-24 22:58:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1102. [2020-09-24 22:58:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-09-24 22:58:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1345 transitions. [2020-09-24 22:58:27,636 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1345 transitions. Word has length 418 [2020-09-24 22:58:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:58:27,638 INFO L479 AbstractCegarLoop]: Abstraction has 1102 states and 1345 transitions. [2020-09-24 22:58:27,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:58:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1345 transitions. [2020-09-24 22:58:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-24 22:58:27,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:58:27,659 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] [2020-09-24 22:58:27,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:58:27,660 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:58:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:58:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1571498271, now seen corresponding path program 1 times [2020-09-24 22:58:27,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:58:27,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44290520] [2020-09-24 22:58:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:58:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:27,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:28,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:28,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:28,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:28,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:32,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:32,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-24 22:58:32,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 22:58:32,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 22:58:32,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:58:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-09-24 22:58:32,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-09-24 22:58:32,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:58:33,307 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 22:58:33,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:58:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:33,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:33,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:33,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 22:58:33,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:58:33,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-24 22:58:33,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:33,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:58:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:58:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:58:33,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:58:33,702 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 22:58:33,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44290520] [2020-09-24 22:58:33,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:58:33,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:58:33,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097504544] [2020-09-24 22:58:33,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:58:33,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:58:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:58:33,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:58:33,711 INFO L87 Difference]: Start difference. First operand 1102 states and 1345 transitions. Second operand 4 states. [2020-09-24 22:58:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:58:36,161 INFO L93 Difference]: Finished difference Result 2222 states and 2792 transitions. [2020-09-24 22:58:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:58:36,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-24 22:58:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:58:36,172 INFO L225 Difference]: With dead ends: 2222 [2020-09-24 22:58:36,172 INFO L226 Difference]: Without dead ends: 1828 [2020-09-24 22:58:36,176 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 [2020-09-24 22:58:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-09-24 22:58:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1816. [2020-09-24 22:58:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2020-09-24 22:58:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2253 transitions. [2020-09-24 22:58:36,238 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2253 transitions. Word has length 418 [2020-09-24 22:58:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:58:36,239 INFO L479 AbstractCegarLoop]: Abstraction has 1816 states and 2253 transitions. [2020-09-24 22:58:36,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:58:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2253 transitions. [2020-09-24 22:58:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-24 22:58:36,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:58:36,245 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] [2020-09-24 22:58:36,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:58:36,245 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:58:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:58:36,246 INFO L82 PathProgramCache]: Analyzing trace with hash 924566943, now seen corresponding path program 1 times [2020-09-24 22:58:36,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:58:36,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498259190] [2020-09-24 22:58:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:58:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:36,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:36,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:36,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:37,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:37,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:37,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:41,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:41,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-24 22:58:41,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 22:58:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-24 22:58:41,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:41,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:58:41,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-09-24 22:58:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-09-24 22:58:41,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:58:41,759 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 22:58:41,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:58:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:41,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:41,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:41,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 22:58:41,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:58:41,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 22:58:41,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:41,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:58:41,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:58:41,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:58:41,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:58:42,091 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 22:58:42,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498259190] [2020-09-24 22:58:42,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:58:42,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:58:42,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101170686] [2020-09-24 22:58:42,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:58:42,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:58:42,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:58:42,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:58:42,096 INFO L87 Difference]: Start difference. First operand 1816 states and 2253 transitions. Second operand 4 states. [2020-09-24 22:58:44,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:58:44,384 INFO L93 Difference]: Finished difference Result 3904 states and 4955 transitions. [2020-09-24 22:58:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:58:44,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-24 22:58:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:58:44,400 INFO L225 Difference]: With dead ends: 3904 [2020-09-24 22:58:44,401 INFO L226 Difference]: Without dead ends: 3194 [2020-09-24 22:58:44,404 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 22:58:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-09-24 22:58:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3172. [2020-09-24 22:58:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2020-09-24 22:58:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3977 transitions. [2020-09-24 22:58:44,486 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3977 transitions. Word has length 418 [2020-09-24 22:58:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:58:44,487 INFO L479 AbstractCegarLoop]: Abstraction has 3172 states and 3977 transitions. [2020-09-24 22:58:44,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:58:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3977 transitions. [2020-09-24 22:58:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-24 22:58:44,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:58:44,495 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] [2020-09-24 22:58:44,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:58:44,496 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:58:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:58:44,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1033201695, now seen corresponding path program 1 times [2020-09-24 22:58:44,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:58:44,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595811335] [2020-09-24 22:58:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:58:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:44,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:44,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:45,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:45,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:45,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:46,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:48,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:48,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:49,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:49,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-24 22:58:49,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 22:58:49,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-24 22:58:49,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:49,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 22:58:49,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-24 22:58:49,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-24 22:58:49,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:58:49,986 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 22:58:49,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:58:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:50,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:50,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:50,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 22:58:50,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:58:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 22:58:50,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:50,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:58:50,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:58:50,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:58:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:58:50,188 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 22:58:50,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595811335] [2020-09-24 22:58:50,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:58:50,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:58:50,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420585179] [2020-09-24 22:58:50,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:58:50,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:58:50,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:58:50,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:58:50,192 INFO L87 Difference]: Start difference. First operand 3172 states and 3977 transitions. Second operand 5 states. [2020-09-24 22:58:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:58:54,163 INFO L93 Difference]: Finished difference Result 8965 states and 11305 transitions. [2020-09-24 22:58:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:58:54,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-24 22:58:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:58:54,189 INFO L225 Difference]: With dead ends: 8965 [2020-09-24 22:58:54,189 INFO L226 Difference]: Without dead ends: 5993 [2020-09-24 22:58:54,197 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 [2020-09-24 22:58:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2020-09-24 22:58:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 5991. [2020-09-24 22:58:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5991 states. [2020-09-24 22:58:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5991 states to 5991 states and 7503 transitions. [2020-09-24 22:58:54,430 INFO L78 Accepts]: Start accepts. Automaton has 5991 states and 7503 transitions. Word has length 418 [2020-09-24 22:58:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:58:54,431 INFO L479 AbstractCegarLoop]: Abstraction has 5991 states and 7503 transitions. [2020-09-24 22:58:54,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:58:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5991 states and 7503 transitions. [2020-09-24 22:58:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-24 22:58:54,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:58:54,442 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] [2020-09-24 22:58:54,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:58:54,443 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:58:54,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:58:54,443 INFO L82 PathProgramCache]: Analyzing trace with hash -676326801, now seen corresponding path program 1 times [2020-09-24 22:58:54,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:58:54,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784668666] [2020-09-24 22:58:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:58:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:54,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:54,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:54,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:54,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:55,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:55,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:55,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:57,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:59,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:59,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-09-24 22:58:59,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 22:58:59,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-09-24 22:58:59,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:58:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-24 22:58:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 22:58:59,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:58:59,831 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 22:58:59,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:58:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:59,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:59,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:59,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 22:58:59,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:58:59,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 22:58:59,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:59,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:58:59,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:58:59,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:58:59,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:58:59,961 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 22:58:59,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784668666] [2020-09-24 22:58:59,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:58:59,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:58:59,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31571012] [2020-09-24 22:58:59,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:58:59,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:58:59,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:58:59,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:58:59,963 INFO L87 Difference]: Start difference. First operand 5991 states and 7503 transitions. Second operand 4 states. [2020-09-24 22:59:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:59:03,729 INFO L93 Difference]: Finished difference Result 17418 states and 21885 transitions. [2020-09-24 22:59:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:59:03,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 419 [2020-09-24 22:59:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:59:03,771 INFO L225 Difference]: With dead ends: 17418 [2020-09-24 22:59:03,771 INFO L226 Difference]: Without dead ends: 11749 [2020-09-24 22:59:03,785 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 22:59:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2020-09-24 22:59:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 5994. [2020-09-24 22:59:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5994 states. [2020-09-24 22:59:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5994 states to 5994 states and 7507 transitions. [2020-09-24 22:59:04,015 INFO L78 Accepts]: Start accepts. Automaton has 5994 states and 7507 transitions. Word has length 419 [2020-09-24 22:59:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:59:04,018 INFO L479 AbstractCegarLoop]: Abstraction has 5994 states and 7507 transitions. [2020-09-24 22:59:04,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:59:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5994 states and 7507 transitions. [2020-09-24 22:59:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-09-24 22:59:04,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:59:04,029 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] [2020-09-24 22:59:04,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:59:04,030 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:59:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:59:04,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1173439175, now seen corresponding path program 1 times [2020-09-24 22:59:04,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:59:04,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219289346] [2020-09-24 22:59:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:59:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:59:04,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:59:04,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking...