/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/Problem02_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:43:37,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:43:37,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:43:37,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:43:37,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:43:37,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:43:37,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:43:37,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:43:37,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:43:37,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:43:37,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:43:37,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:43:37,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:43:37,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:43:37,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:43:37,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:43:37,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:43:37,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:43:37,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:43:37,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:43:37,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:43:37,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:43:37,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:43:37,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:43:37,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:43:37,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:43:37,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:43:37,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:43:37,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:43:37,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:43:37,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:43:37,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:43:37,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:43:37,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:43:37,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:43:37,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:43:37,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:43:37,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:43:37,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:43:37,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:43:37,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:43:37,108 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 21:43:37,137 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:43:37,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:43:37,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:43:37,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:43:37,140 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:43:37,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:43:37,140 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:43:37,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:43:37,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:43:37,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:43:37,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:43:37,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:43:37,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:43:37,142 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:43:37,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:43:37,142 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:43:37,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:43:37,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:43:37,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:43:37,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:43:37,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:43:37,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:37,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:43:37,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:43:37,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:43:37,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:43:37,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:43:37,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:43:37,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:43:37,148 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 21:43:37,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:43:37,685 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:43:37,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:43:37,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:43:37,695 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:43:37,696 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label51.c [2020-09-24 21:43:37,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efde73f69/4aec2645484e4e82947ef729f48c55b6/FLAG2a955dd23 [2020-09-24 21:43:38,474 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:38,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label51.c [2020-09-24 21:43:38,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efde73f69/4aec2645484e4e82947ef729f48c55b6/FLAG2a955dd23 [2020-09-24 21:43:38,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efde73f69/4aec2645484e4e82947ef729f48c55b6 [2020-09-24 21:43:38,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:38,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:38,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:38,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:38,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:38,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:38" (1/1) ... [2020-09-24 21:43:38,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d876c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:38, skipping insertion in model container [2020-09-24 21:43:38,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:38" (1/1) ... [2020-09-24 21:43:38,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:38,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:39,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:39,352 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:39,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:39,657 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:39,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39 WrapperNode [2020-09-24 21:43:39,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:39,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:39,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:39,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:39,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39" (1/1) ... [2020-09-24 21:43:39,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39" (1/1) ... [2020-09-24 21:43:39,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39" (1/1) ... [2020-09-24 21:43:39,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39" (1/1) ... [2020-09-24 21:43:39,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39" (1/1) ... [2020-09-24 21:43:39,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39" (1/1) ... [2020-09-24 21:43:39,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39" (1/1) ... [2020-09-24 21:43:39,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:39,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:39,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:39,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:39,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39" (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 21:43:39,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:39,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:39,874 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:39,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:39,874 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:39,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:41,270 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:41,271 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:41,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:41 BoogieIcfgContainer [2020-09-24 21:43:41,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:41,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:41,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:41,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:41,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:38" (1/3) ... [2020-09-24 21:43:41,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb4822a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:41, skipping insertion in model container [2020-09-24 21:43:41,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:39" (2/3) ... [2020-09-24 21:43:41,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb4822a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:41, skipping insertion in model container [2020-09-24 21:43:41,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:41" (3/3) ... [2020-09-24 21:43:41,293 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label51.c [2020-09-24 21:43:41,306 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:41,318 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:41,341 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:41,376 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:41,376 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:41,376 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:41,376 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:41,377 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:41,377 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:41,377 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:41,377 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 21:43:41,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:41,434 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] [2020-09-24 21:43:41,435 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:41,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1376443753, now seen corresponding path program 1 times [2020-09-24 21:43:41,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:41,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087928403] [2020-09-24 21:43:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:41,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:43,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:46,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-24 21:43:46,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:43:46,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-24 21:43:46,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:46,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:46,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:43:47,641 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-09-24 21:43:47,832 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2020-09-24 21:43:47,982 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-09-24 21:43:48,128 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2020-09-24 21:43:48,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:48,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:48,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:48,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:48,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-24 21:43:48,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:48,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:48,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:48,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:48,785 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 21:43:48,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087928403] [2020-09-24 21:43:48,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:48,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:48,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674215625] [2020-09-24 21:43:48,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:48,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:48,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:48,823 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:43:49,436 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-09-24 21:43:49,756 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-09-24 21:43:50,138 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2020-09-24 21:43:50,537 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-24 21:43:50,911 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-09-24 21:43:51,416 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2020-09-24 21:43:51,607 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-09-24 21:43:52,740 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2020-09-24 21:43:52,984 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-09-24 21:43:53,328 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 21:43:54,149 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-09-24 21:43:54,688 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2020-09-24 21:43:54,908 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 21:43:55,952 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:43:56,405 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:43:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:58,936 INFO L93 Difference]: Finished difference Result 1869 states and 2661 transitions. [2020-09-24 21:43:58,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:43:58,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 136 [2020-09-24 21:43:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:58,967 INFO L225 Difference]: With dead ends: 1869 [2020-09-24 21:43:58,967 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 21:43:58,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:43:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 21:43:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1076. [2020-09-24 21:43:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:43:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1293 transitions. [2020-09-24 21:43:59,113 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1293 transitions. Word has length 136 [2020-09-24 21:43:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:59,114 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1293 transitions. [2020-09-24 21:43:59,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:43:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1293 transitions. [2020-09-24 21:43:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 21:43:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:59,133 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-24 21:43:59,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:59,133 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:59,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:59,134 INFO L82 PathProgramCache]: Analyzing trace with hash 82692427, now seen corresponding path program 1 times [2020-09-24 21:43:59,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:59,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195772617] [2020-09-24 21:43:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:59,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:59,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:59,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:00,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:01,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:02,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:02,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:04,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-24 21:44:04,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:44:04,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:44:04,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:04,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:44:04,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:44:04,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:44:04,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:04,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:04,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:04,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:04,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:04,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 21:44:04,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:44:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:04,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:04,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:04,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:04,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:44:04,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:04,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 21:44:04,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:04,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:44:04,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:04,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:44:04,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:44:05,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195772617] [2020-09-24 21:44:05,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:05,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:44:05,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344156578] [2020-09-24 21:44:05,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:44:05,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:44:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:44:05,085 INFO L87 Difference]: Start difference. First operand 1076 states and 1293 transitions. Second operand 19 states. [2020-09-24 21:44:06,198 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 21:44:06,447 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:44:07,732 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:44:07,994 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-09-24 21:44:09,299 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:44:09,680 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 21:44:10,480 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-09-24 21:44:10,961 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-09-24 21:44:11,716 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 21:44:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:13,568 INFO L93 Difference]: Finished difference Result 4103 states and 5484 transitions. [2020-09-24 21:44:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:44:13,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 158 [2020-09-24 21:44:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:13,590 INFO L225 Difference]: With dead ends: 4103 [2020-09-24 21:44:13,590 INFO L226 Difference]: Without dead ends: 3107 [2020-09-24 21:44:13,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:44:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-09-24 21:44:13,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3029. [2020-09-24 21:44:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-09-24 21:44:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3672 transitions. [2020-09-24 21:44:13,753 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3672 transitions. Word has length 158 [2020-09-24 21:44:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:13,753 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 3672 transitions. [2020-09-24 21:44:13,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:44:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3672 transitions. [2020-09-24 21:44:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-24 21:44:13,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:13,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:44:13,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:44:13,775 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:13,776 INFO L82 PathProgramCache]: Analyzing trace with hash 81544758, now seen corresponding path program 1 times [2020-09-24 21:44:13,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:13,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348363391] [2020-09-24 21:44:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:14,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:15,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:15,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:16,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:17,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:17,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:17,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:18,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-24 21:44:18,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:44:18,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:44:18,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:18,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:44:18,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:44:18,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:44:18,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:19,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:19,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:19,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:19,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:19,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 21:44:19,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:19,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:19,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:19,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:19,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:19,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:19,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:19,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:19,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:44:19,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:19,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 21:44:19,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:19,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:19,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:19,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:44:19,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:19,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:44:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:19,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:19,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:19,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:19,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:44:19,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:19,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 21:44:19,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:19,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:44:19,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:19,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:44:19,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:44:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:44:19,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348363391] [2020-09-24 21:44:19,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:19,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:44:19,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899678388] [2020-09-24 21:44:19,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:44:19,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:19,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:44:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:44:19,835 INFO L87 Difference]: Start difference. First operand 3029 states and 3672 transitions. Second operand 12 states. [2020-09-24 21:44:21,258 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-09-24 21:44:23,092 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-09-24 21:44:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:26,280 INFO L93 Difference]: Finished difference Result 8675 states and 11475 transitions. [2020-09-24 21:44:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:44:26,281 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 171 [2020-09-24 21:44:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:26,316 INFO L225 Difference]: With dead ends: 8675 [2020-09-24 21:44:26,317 INFO L226 Difference]: Without dead ends: 5373 [2020-09-24 21:44:26,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:44:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5373 states. [2020-09-24 21:44:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5373 to 4725. [2020-09-24 21:44:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4725 states. [2020-09-24 21:44:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 5813 transitions. [2020-09-24 21:44:26,495 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 5813 transitions. Word has length 171 [2020-09-24 21:44:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:26,496 INFO L479 AbstractCegarLoop]: Abstraction has 4725 states and 5813 transitions. [2020-09-24 21:44:26,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:44:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 5813 transitions. [2020-09-24 21:44:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-09-24 21:44:26,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:26,516 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:44:26,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:44:26,517 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1686553950, now seen corresponding path program 1 times [2020-09-24 21:44:26,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:26,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571220290] [2020-09-24 21:44:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:26,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:29,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking...