/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_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:42:00,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:42:00,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:42:00,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:42:00,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:42:00,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:42:00,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:42:00,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:42:00,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:42:00,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:42:00,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:42:00,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:42:00,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:42:00,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:42:00,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:42:00,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:42:00,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:42:00,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:42:00,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:42:00,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:42:00,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:42:00,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:42:00,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:42:00,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:42:00,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:42:00,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:42:00,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:42:00,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:42:00,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:42:00,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:42:00,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:42:00,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:42:00,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:42:00,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:42:00,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:42:00,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:42:00,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:42:00,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:42:00,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:42:00,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:42:00,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:42:00,789 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 21:42:00,850 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:42:00,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:42:00,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:42:00,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:42:00,856 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:42:00,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:42:00,856 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:42:00,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:42:00,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:42:00,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:42:00,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:42:00,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:42:00,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:42:00,858 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:42:00,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:42:00,858 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:42:00,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:42:00,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:42:00,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:42:00,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:42:00,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:42:00,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:42:00,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:42:00,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:42:00,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:42:00,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:42:00,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:42:00,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:42:00,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:42:00,863 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 21:42:01,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:42:01,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:42:01,357 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:42:01,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:42:01,360 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:42:01,361 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label21.c [2020-09-24 21:42:01,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/282774c9a/81245e1f2e734864aeda2d325dd06fa0/FLAGb103cbc3c [2020-09-24 21:42:02,094 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:42:02,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label21.c [2020-09-24 21:42:02,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/282774c9a/81245e1f2e734864aeda2d325dd06fa0/FLAGb103cbc3c [2020-09-24 21:42:02,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/282774c9a/81245e1f2e734864aeda2d325dd06fa0 [2020-09-24 21:42:02,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:42:02,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:42:02,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:02,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:42:02,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:42:02,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:02" (1/1) ... [2020-09-24 21:42:02,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:02, skipping insertion in model container [2020-09-24 21:42:02,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:02" (1/1) ... [2020-09-24 21:42:02,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:42:02,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:42:02,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:42:02,891 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:42:03,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:42:03,185 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:42:03,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03 WrapperNode [2020-09-24 21:42:03,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:03,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:42:03,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:42:03,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:42:03,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03" (1/1) ... [2020-09-24 21:42:03,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03" (1/1) ... [2020-09-24 21:42:03,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03" (1/1) ... [2020-09-24 21:42:03,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03" (1/1) ... [2020-09-24 21:42:03,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03" (1/1) ... [2020-09-24 21:42:03,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03" (1/1) ... [2020-09-24 21:42:03,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03" (1/1) ... [2020-09-24 21:42:03,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:42:03,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:42:03,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:42:03,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:42:03,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03" (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 21:42:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:42:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:42:03,379 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:42:03,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:42:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:42:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:42:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:42:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:42:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:42:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:42:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:42:04,941 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:42:04,943 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:42:04,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:42:04 BoogieIcfgContainer [2020-09-24 21:42:04,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:42:04,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:42:04,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:42:04,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:42:04,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:42:02" (1/3) ... [2020-09-24 21:42:04,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:42:04, skipping insertion in model container [2020-09-24 21:42:04,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:03" (2/3) ... [2020-09-24 21:42:04,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:42:04, skipping insertion in model container [2020-09-24 21:42:04,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:42:04" (3/3) ... [2020-09-24 21:42:04,973 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label21.c [2020-09-24 21:42:04,986 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:42:05,005 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:42:05,032 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:42:05,076 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:42:05,077 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:42:05,077 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:42:05,077 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:42:05,077 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:42:05,078 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:42:05,078 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:42:05,078 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:42:05,122 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:42:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-24 21:42:05,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:05,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:42:05,145 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:05,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1196465745, now seen corresponding path program 1 times [2020-09-24 21:42:05,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:05,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400466314] [2020-09-24 21:42:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:05,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:05,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:06,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:07,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:07,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:07,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:08,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:10,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:10,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-09-24 21:42:10,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:42:10,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:42:10,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:10,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:42:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:42:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:42:10,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:42:11,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:11,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:11,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:11,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:11,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:11,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 21:42:11,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:11,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:11,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:11,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:11,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:11,358 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 21:42:11,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400466314] [2020-09-24 21:42:11,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:42:11,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-24 21:42:11,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820931233] [2020-09-24 21:42:11,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:42:11,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:11,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:42:11,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:42:11,391 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 17 states. [2020-09-24 21:42:11,750 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 21:42:11,917 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 21:42:12,126 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2020-09-24 21:42:12,323 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-09-24 21:42:12,522 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:42:12,880 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 21:42:13,181 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:42:13,675 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-09-24 21:42:14,616 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:42:14,820 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-09-24 21:42:15,008 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-09-24 21:42:15,317 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:42:16,024 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-09-24 21:42:16,424 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-09-24 21:42:16,619 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:42:17,526 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:42:17,937 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 21:42:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:20,189 INFO L93 Difference]: Finished difference Result 1860 states and 2652 transitions. [2020-09-24 21:42:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:42:20,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 122 [2020-09-24 21:42:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:20,234 INFO L225 Difference]: With dead ends: 1860 [2020-09-24 21:42:20,234 INFO L226 Difference]: Without dead ends: 1230 [2020-09-24 21:42:20,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 21:42:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2020-09-24 21:42:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1070. [2020-09-24 21:42:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:42:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1287 transitions. [2020-09-24 21:42:20,383 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1287 transitions. Word has length 122 [2020-09-24 21:42:20,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:20,383 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1287 transitions. [2020-09-24 21:42:20,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:42:20,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1287 transitions. [2020-09-24 21:42:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-24 21:42:20,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:20,394 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] [2020-09-24 21:42:20,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:42:20,395 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:20,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1023468109, now seen corresponding path program 1 times [2020-09-24 21:42:20,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:20,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122968337] [2020-09-24 21:42:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:20,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:20,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:20,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:21,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:21,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:23,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:24,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:24,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:25,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:25,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-09-24 21:42:25,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:42:25,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:42:25,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:42:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:42:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:42:25,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:25,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:25,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:25,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:25,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:25,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:25,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 21:42:25,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:25,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:42:25,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:25,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:25,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:26,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:26,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:26,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:26,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:42:26,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:26,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-24 21:42:26,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:26,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:42:26,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:26,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:42:26,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:26,704 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 21:42:26,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122968337] [2020-09-24 21:42:26,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:26,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:42:26,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558686672] [2020-09-24 21:42:26,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:42:26,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:42:26,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:42:26,710 INFO L87 Difference]: Start difference. First operand 1070 states and 1287 transitions. Second operand 20 states. [2020-09-24 21:42:27,425 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-09-24 21:42:27,664 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-09-24 21:42:28,058 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-09-24 21:42:28,393 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-09-24 21:42:28,638 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-09-24 21:42:29,365 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-09-24 21:42:29,655 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-09-24 21:42:30,132 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-09-24 21:42:30,322 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-09-24 21:42:30,492 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-09-24 21:42:30,741 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-09-24 21:42:30,989 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-09-24 21:42:31,312 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-09-24 21:42:32,226 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-09-24 21:42:32,570 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-09-24 21:42:32,936 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-09-24 21:42:33,674 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-09-24 21:42:34,096 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-09-24 21:42:35,043 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-09-24 21:42:35,396 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-09-24 21:42:36,175 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-09-24 21:42:36,704 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-09-24 21:42:37,240 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2020-09-24 21:42:37,564 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-09-24 21:42:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:40,004 INFO L93 Difference]: Finished difference Result 4480 states and 6103 transitions. [2020-09-24 21:42:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 21:42:40,005 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 144 [2020-09-24 21:42:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:40,034 INFO L225 Difference]: With dead ends: 4480 [2020-09-24 21:42:40,035 INFO L226 Difference]: Without dead ends: 3490 [2020-09-24 21:42:40,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1020, Invalid=2886, Unknown=0, NotChecked=0, Total=3906 [2020-09-24 21:42:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2020-09-24 21:42:40,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 3407. [2020-09-24 21:42:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3407 states. [2020-09-24 21:42:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4134 transitions. [2020-09-24 21:42:40,197 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4134 transitions. Word has length 144 [2020-09-24 21:42:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:40,198 INFO L479 AbstractCegarLoop]: Abstraction has 3407 states and 4134 transitions. [2020-09-24 21:42:40,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:42:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4134 transitions. [2020-09-24 21:42:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-24 21:42:40,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:40,212 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] [2020-09-24 21:42:40,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:42:40,213 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:40,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1719779806, now seen corresponding path program 1 times [2020-09-24 21:42:40,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:40,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666084187] [2020-09-24 21:42:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:40,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:40,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:40,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:40,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:40,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:40,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:42,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:42,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:44,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:44,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:45,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:45,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-09-24 21:42:45,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 21:42:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:42:45,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:42:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:42:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:42:45,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:45,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:45,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:45,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:45,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:45,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:45,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 21:42:45,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:45,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:45,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:45,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:45,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:45,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:45,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:45,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:45,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:45,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:42:45,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:45,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 21:42:45,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:42:45,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:45,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:42:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:45,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:45,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:45,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:45,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:42:45,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:45,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 21:42:45,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:45,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:45,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:45,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:42:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:42:46,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666084187] [2020-09-24 21:42:46,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:46,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:42:46,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740424761] [2020-09-24 21:42:46,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:42:46,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:46,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:42:46,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:42:46,046 INFO L87 Difference]: Start difference. First operand 3407 states and 4134 transitions. Second operand 13 states. [2020-09-24 21:42:47,324 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-09-24 21:42:49,254 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-09-24 21:42:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:52,345 INFO L93 Difference]: Finished difference Result 9278 states and 12123 transitions. [2020-09-24 21:42:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:42:52,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 157 [2020-09-24 21:42:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:52,375 INFO L225 Difference]: With dead ends: 9278 [2020-09-24 21:42:52,375 INFO L226 Difference]: Without dead ends: 5596 [2020-09-24 21:42:52,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:42:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2020-09-24 21:42:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 5103. [2020-09-24 21:42:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5103 states. [2020-09-24 21:42:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5103 states to 5103 states and 6303 transitions. [2020-09-24 21:42:52,563 INFO L78 Accepts]: Start accepts. Automaton has 5103 states and 6303 transitions. Word has length 157 [2020-09-24 21:42:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:52,563 INFO L479 AbstractCegarLoop]: Abstraction has 5103 states and 6303 transitions. [2020-09-24 21:42:52,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:42:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 5103 states and 6303 transitions. [2020-09-24 21:42:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-24 21:42:52,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:52,582 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:42:52,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:42:52,582 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:52,583 INFO L82 PathProgramCache]: Analyzing trace with hash -44704532, now seen corresponding path program 1 times [2020-09-24 21:42:52,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:52,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704014193] [2020-09-24 21:42:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:52,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:52,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:53,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:53,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:53,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:53,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:53,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking...