/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:39:15,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:39:15,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:39:15,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:39:15,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:39:15,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:39:15,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:39:15,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:39:15,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:39:16,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:39:16,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:39:16,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:39:16,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:39:16,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:39:16,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:39:16,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:39:16,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:39:16,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:39:16,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:39:16,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:39:16,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:39:16,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:39:16,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:39:16,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:39:16,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:39:16,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:39:16,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:39:16,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:39:16,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:39:16,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:39:16,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:39:16,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:39:16,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:39:16,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:39:16,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:39:16,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:39:16,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:39:16,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:39:16,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:39:16,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:39:16,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:39:16,050 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 21:39:16,098 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:39:16,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:39:16,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:39:16,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:39:16,101 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:39:16,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:39:16,102 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:39:16,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:39:16,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:39:16,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:39:16,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:39:16,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:39:16,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:39:16,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:39:16,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:39:16,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:39:16,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:39:16,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:39:16,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:39:16,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:39:16,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:39:16,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:16,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:39:16,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:39:16,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:39:16,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:39:16,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:39:16,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:39:16,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:39:16,108 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:39:16,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:39:16,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:39:16,652 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:39:16,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:39:16,657 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:39:16,658 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2020-09-24 21:39:16,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ae23301a/d89ea180aabc4acd87003da69261a17d/FLAG3cd3855f5 [2020-09-24 21:39:17,457 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:39:17,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2020-09-24 21:39:17,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ae23301a/d89ea180aabc4acd87003da69261a17d/FLAG3cd3855f5 [2020-09-24 21:39:17,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ae23301a/d89ea180aabc4acd87003da69261a17d [2020-09-24 21:39:17,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:39:17,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:39:17,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:17,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:39:17,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:39:17,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:17" (1/1) ... [2020-09-24 21:39:17,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756d08d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17, skipping insertion in model container [2020-09-24 21:39:17,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:17" (1/1) ... [2020-09-24 21:39:17,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:39:17,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:39:18,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:18,324 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:39:18,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:18,451 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:39:18,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18 WrapperNode [2020-09-24 21:39:18,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:18,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:39:18,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:39:18,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:39:18,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18" (1/1) ... [2020-09-24 21:39:18,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18" (1/1) ... [2020-09-24 21:39:18,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18" (1/1) ... [2020-09-24 21:39:18,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18" (1/1) ... [2020-09-24 21:39:18,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18" (1/1) ... [2020-09-24 21:39:18,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18" (1/1) ... [2020-09-24 21:39:18,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18" (1/1) ... [2020-09-24 21:39:18,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:39:18,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:39:18,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:39:18,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:39:18,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18" (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 21:39:18,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:39:18,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:39:18,691 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:39:18,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:39:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:39:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:39:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:39:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:39:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:39:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:39:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:39:20,054 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:39:20,054 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:39:20,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:20 BoogieIcfgContainer [2020-09-24 21:39:20,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:39:20,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:39:20,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:39:20,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:39:20,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:39:17" (1/3) ... [2020-09-24 21:39:20,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b352645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:20, skipping insertion in model container [2020-09-24 21:39:20,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:18" (2/3) ... [2020-09-24 21:39:20,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b352645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:20, skipping insertion in model container [2020-09-24 21:39:20,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:20" (3/3) ... [2020-09-24 21:39:20,074 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label17.c [2020-09-24 21:39:20,085 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:39:20,096 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:39:20,119 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:39:20,155 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:39:20,155 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:39:20,155 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:39:20,155 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:39:20,155 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:39:20,156 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:39:20,156 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:39:20,156 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:39:20,189 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:39:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-24 21:39:20,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:20,213 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] [2020-09-24 21:39:20,213 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:20,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1930932209, now seen corresponding path program 1 times [2020-09-24 21:39:20,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:20,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124574270] [2020-09-24 21:39:20,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:20,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:21,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:21,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:22,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:23,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:25,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:25,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:25,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:25,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:25,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-09-24 21:39:25,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:39:25,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:39:25,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:39:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:39:25,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:39:26,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:26,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:26,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:26,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:26,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:26,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-24 21:39:26,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:26,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:26,833 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 21:39:26,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124574270] [2020-09-24 21:39:26,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:39:26,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:39:26,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306945211] [2020-09-24 21:39:26,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:39:26,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:26,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:39:26,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:39:26,871 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:39:27,531 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 21:39:27,810 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-09-24 21:39:28,065 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-09-24 21:39:28,501 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-09-24 21:39:29,491 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-09-24 21:39:29,890 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-09-24 21:39:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:33,799 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:39:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:39:33,803 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 144 [2020-09-24 21:39:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:33,835 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:39:33,836 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:39:33,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=303, Invalid=627, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:39:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:39:33,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:39:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:39:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1148 transitions. [2020-09-24 21:39:33,974 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1148 transitions. Word has length 144 [2020-09-24 21:39:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:33,977 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1148 transitions. [2020-09-24 21:39:33,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:39:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1148 transitions. [2020-09-24 21:39:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-24 21:39:33,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:33,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:33,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:39:33,989 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:33,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:33,990 INFO L82 PathProgramCache]: Analyzing trace with hash -770413602, now seen corresponding path program 1 times [2020-09-24 21:39:33,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:33,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381779621] [2020-09-24 21:39:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:34,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:34,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:34,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:35,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:35,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:35,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:36,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:37,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:39,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:39,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:39,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-09-24 21:39:39,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:39:39,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-24 21:39:39,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:39,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:39:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:39:39,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:39,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:39,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:39,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:39,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:39,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-24 21:39:39,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:39,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:39,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:39,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:39,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:39,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:39,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:39,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:39,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-24 21:39:39,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:39,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:39:39,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:39,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:39:39,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381779621] [2020-09-24 21:39:39,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:39,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:39:39,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517595718] [2020-09-24 21:39:39,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:39:39,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:39,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:39:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:39:39,927 INFO L87 Difference]: Start difference. First operand 985 states and 1148 transitions. Second operand 13 states. [2020-09-24 21:39:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:45,731 INFO L93 Difference]: Finished difference Result 2790 states and 3438 transitions. [2020-09-24 21:39:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 21:39:45,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2020-09-24 21:39:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:45,742 INFO L225 Difference]: With dead ends: 2790 [2020-09-24 21:39:45,742 INFO L226 Difference]: Without dead ends: 1633 [2020-09-24 21:39:45,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 21:39:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2020-09-24 21:39:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1278. [2020-09-24 21:39:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2020-09-24 21:39:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1477 transitions. [2020-09-24 21:39:45,801 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1477 transitions. Word has length 165 [2020-09-24 21:39:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:45,801 INFO L479 AbstractCegarLoop]: Abstraction has 1278 states and 1477 transitions. [2020-09-24 21:39:45,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:39:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1477 transitions. [2020-09-24 21:39:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-24 21:39:45,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:45,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:45,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:39:45,809 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash -337224646, now seen corresponding path program 1 times [2020-09-24 21:39:45,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:45,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005195650] [2020-09-24 21:39:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:45,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:45,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:46,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:50,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:50,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:50,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:51,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:51,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-09-24 21:39:51,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:39:51,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5235 [2020-09-24 21:39:51,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:51,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:39:51,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:39:51,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 21:39:51,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:51,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:51,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:51,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:51,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:51,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:51,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 21:39:51,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:51,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:51,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:51,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:51,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:51,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:39:51,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:51,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 21:39:51,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:51,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:39:51,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:51,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:39:51,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:52,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:39:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:52,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:52,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:52,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:52,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:52,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:52,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-09-24 21:39:52,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:52,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:52,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005195650] [2020-09-24 21:39:52,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:52,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:39:52,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53490844] [2020-09-24 21:39:52,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:39:52,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:52,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:39:52,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:39:52,591 INFO L87 Difference]: Start difference. First operand 1278 states and 1477 transitions. Second operand 23 states. [2020-09-24 21:39:53,240 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-09-24 21:39:54,471 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-09-24 21:39:55,022 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-09-24 21:39:55,545 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-09-24 21:39:56,098 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-09-24 21:39:56,441 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:39:56,899 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-09-24 21:39:57,357 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-09-24 21:39:57,735 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-09-24 21:39:58,727 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2020-09-24 21:39:59,317 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2020-09-24 21:39:59,698 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-09-24 21:40:00,074 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 88 [2020-09-24 21:40:00,568 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 87 [2020-09-24 21:40:01,033 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-09-24 21:40:01,497 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-09-24 21:40:01,830 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2020-09-24 21:40:03,031 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2020-09-24 21:40:03,444 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-09-24 21:40:04,032 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-09-24 21:40:05,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:05,150 INFO L93 Difference]: Finished difference Result 4103 states and 5214 transitions. [2020-09-24 21:40:05,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 21:40:05,151 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 182 [2020-09-24 21:40:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:05,166 INFO L225 Difference]: With dead ends: 4103 [2020-09-24 21:40:05,166 INFO L226 Difference]: Without dead ends: 2913 [2020-09-24 21:40:05,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=828, Invalid=2594, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 21:40:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2020-09-24 21:40:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2492. [2020-09-24 21:40:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2492 states. [2020-09-24 21:40:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3011 transitions. [2020-09-24 21:40:05,258 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3011 transitions. Word has length 182 [2020-09-24 21:40:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:05,259 INFO L479 AbstractCegarLoop]: Abstraction has 2492 states and 3011 transitions. [2020-09-24 21:40:05,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:40:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3011 transitions. [2020-09-24 21:40:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-24 21:40:05,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:05,272 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:05,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:40:05,272 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:05,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:05,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1064263222, now seen corresponding path program 1 times [2020-09-24 21:40:05,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:05,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401150203] [2020-09-24 21:40:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:05,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:05,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:07,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking...