/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/Problem11_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:46:22,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:46:22,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:46:22,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:46:22,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:46:22,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:46:22,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:46:22,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:46:22,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:46:22,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:46:22,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:46:22,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:46:22,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:46:22,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:46:22,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:46:22,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:46:22,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:46:22,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:46:22,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:46:22,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:46:22,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:46:22,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:46:22,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:46:22,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:46:22,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:46:22,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:46:22,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:46:22,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:46:22,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:46:22,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:46:22,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:46:22,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:46:22,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:46:22,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:46:22,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:46:22,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:46:22,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:46:22,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:46:22,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:46:22,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:46:22,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:46:22,867 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 21:46:22,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:46:22,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:46:22,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:46:22,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:46:22,916 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:46:22,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:46:22,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:46:22,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:46:22,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:46:22,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:46:22,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:46:22,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:46:22,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:46:22,919 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:46:22,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:46:22,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:46:22,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:46:22,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:46:22,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:46:22,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:46:22,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:46:22,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:46:22,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:46:22,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:46:22,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:46:22,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:46:22,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:46:22,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:46:22,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:46:22,922 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 21:46:23,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:46:23,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:46:23,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:46:23,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:46:23,390 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:46:23,391 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label36.c [2020-09-24 21:46:23,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/463859312/69f97a6892764525947727bb476fa7e4/FLAG6dc3bb241 [2020-09-24 21:46:24,207 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:46:24,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label36.c [2020-09-24 21:46:24,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/463859312/69f97a6892764525947727bb476fa7e4/FLAG6dc3bb241 [2020-09-24 21:46:24,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/463859312/69f97a6892764525947727bb476fa7e4 [2020-09-24 21:46:24,374 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:46:24,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:46:24,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:46:24,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:46:24,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:46:24,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:46:24" (1/1) ... [2020-09-24 21:46:24,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41395291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:24, skipping insertion in model container [2020-09-24 21:46:24,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:46:24" (1/1) ... [2020-09-24 21:46:24,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:46:24,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:46:25,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:46:25,087 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:46:25,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:46:25,621 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:46:25,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25 WrapperNode [2020-09-24 21:46:25,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:46:25,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:46:25,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:46:25,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:46:25,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (1/1) ... [2020-09-24 21:46:25,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:46:25,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:46:25,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:46:25,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:46:25,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (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 21:46:25,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:46:25,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:46:25,957 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:46:25,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:46:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:46:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:46:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:46:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:46:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:46:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:46:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:46:28,364 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:46:28,364 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:46:28,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:46:28 BoogieIcfgContainer [2020-09-24 21:46:28,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:46:28,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:46:28,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:46:28,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:46:28,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:46:24" (1/3) ... [2020-09-24 21:46:28,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bb9cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:46:28, skipping insertion in model container [2020-09-24 21:46:28,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:25" (2/3) ... [2020-09-24 21:46:28,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bb9cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:46:28, skipping insertion in model container [2020-09-24 21:46:28,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:46:28" (3/3) ... [2020-09-24 21:46:28,403 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label36.c [2020-09-24 21:46:28,416 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:46:28,435 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:46:28,460 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:46:28,508 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:46:28,509 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:46:28,510 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:46:28,510 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:46:28,510 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:46:28,510 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:46:28,510 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:46:28,511 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:46:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 21:46:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 21:46:28,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:28,571 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] [2020-09-24 21:46:28,572 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:28,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1149620956, now seen corresponding path program 1 times [2020-09-24 21:46:28,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:28,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516189109] [2020-09-24 21:46:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:28,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:29,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:29,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:29,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:29,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 21:46:29,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:46:29,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-09-24 21:46:29,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:29,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:46:29,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:46:29,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 21:46:29,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:46:29,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:29,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:29,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:29,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:46:29,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:29,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 21:46:29,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:29,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:29,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:46:29,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:29,944 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 21:46:29,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516189109] [2020-09-24 21:46:29,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:29,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:46:29,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612602019] [2020-09-24 21:46:29,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:46:29,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:29,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:46:29,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:46:29,980 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-24 21:46:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:35,329 INFO L93 Difference]: Finished difference Result 2231 states and 3021 transitions. [2020-09-24 21:46:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:46:35,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-24 21:46:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:35,361 INFO L225 Difference]: With dead ends: 2231 [2020-09-24 21:46:35,362 INFO L226 Difference]: Without dead ends: 1325 [2020-09-24 21:46:35,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:46:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2020-09-24 21:46:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 997. [2020-09-24 21:46:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-09-24 21:46:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1185 transitions. [2020-09-24 21:46:35,511 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1185 transitions. Word has length 34 [2020-09-24 21:46:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:35,512 INFO L479 AbstractCegarLoop]: Abstraction has 997 states and 1185 transitions. [2020-09-24 21:46:35,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:46:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1185 transitions. [2020-09-24 21:46:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-24 21:46:35,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:35,520 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:46:35,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:46:35,521 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1328266352, now seen corresponding path program 1 times [2020-09-24 21:46:35,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:35,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149894777] [2020-09-24 21:46:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:35,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:35,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:36,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:36,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:38,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:38,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-09-24 21:46:38,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:46:38,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2951 [2020-09-24 21:46:38,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:38,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:46:38,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:46:38,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-09-24 21:46:38,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:38,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:38,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:38,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:38,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:46:38,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:38,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 21:46:38,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:38,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:38,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:38,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:46:38,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:38,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 21:46:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:38,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:38,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:38,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:46:38,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:38,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-09-24 21:46:38,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:38,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:38,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:38,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 21:46:38,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:39,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149894777] [2020-09-24 21:46:39,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:39,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:46:39,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367590248] [2020-09-24 21:46:39,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:46:39,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:39,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:46:39,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:46:39,072 INFO L87 Difference]: Start difference. First operand 997 states and 1185 transitions. Second operand 7 states. [2020-09-24 21:46:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:43,375 INFO L93 Difference]: Finished difference Result 2663 states and 3253 transitions. [2020-09-24 21:46:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:46:43,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2020-09-24 21:46:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:43,390 INFO L225 Difference]: With dead ends: 2663 [2020-09-24 21:46:43,391 INFO L226 Difference]: Without dead ends: 1683 [2020-09-24 21:46:43,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:46:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2020-09-24 21:46:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1400. [2020-09-24 21:46:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2020-09-24 21:46:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1710 transitions. [2020-09-24 21:46:43,487 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1710 transitions. Word has length 116 [2020-09-24 21:46:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:43,490 INFO L479 AbstractCegarLoop]: Abstraction has 1400 states and 1710 transitions. [2020-09-24 21:46:43,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:46:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1710 transitions. [2020-09-24 21:46:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 21:46:43,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:43,505 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:46:43,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:46:43,506 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:43,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:43,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2011577567, now seen corresponding path program 1 times [2020-09-24 21:46:43,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:43,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943315846] [2020-09-24 21:46:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:43,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:43,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:44,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:45,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:45,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:48,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:48,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-09-24 21:46:48,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:46:48,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:46:48,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:46:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:46:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-09-24 21:46:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:48,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:48,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:48,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:46:48,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:48,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:46:48,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:46:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:48,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:46:48,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:46:48,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 21:46:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:48,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:48,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:48,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 21:46:48,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:48,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-24 21:46:48,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:48,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:48,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:48,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 21:46:48,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:49,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943315846] [2020-09-24 21:46:49,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:49,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 21:46:49,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867494566] [2020-09-24 21:46:49,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:46:49,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:46:49,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:46:49,328 INFO L87 Difference]: Start difference. First operand 1400 states and 1710 transitions. Second operand 8 states. [2020-09-24 21:46:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:53,437 INFO L93 Difference]: Finished difference Result 2769 states and 3399 transitions. [2020-09-24 21:46:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:46:53,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 119 [2020-09-24 21:46:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:53,445 INFO L225 Difference]: With dead ends: 2769 [2020-09-24 21:46:53,446 INFO L226 Difference]: Without dead ends: 1386 [2020-09-24 21:46:53,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:46:53,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2020-09-24 21:46:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1356. [2020-09-24 21:46:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1356 states. [2020-09-24 21:46:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1598 transitions. [2020-09-24 21:46:53,488 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1598 transitions. Word has length 119 [2020-09-24 21:46:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:53,489 INFO L479 AbstractCegarLoop]: Abstraction has 1356 states and 1598 transitions. [2020-09-24 21:46:53,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:46:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1598 transitions. [2020-09-24 21:46:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-24 21:46:53,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:53,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:53,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:46:53,492 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:53,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1403558871, now seen corresponding path program 1 times [2020-09-24 21:46:53,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:53,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570664056] [2020-09-24 21:46:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:53,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:53,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:54,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:54,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:55,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:58,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:58,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-09-24 21:46:58,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:46:58,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4587 [2020-09-24 21:46:58,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:46:58,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:46:58,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-09-24 21:46:58,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:46:58,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:58,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:58,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:58,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:46:58,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:58,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 21:46:58,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:58,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:46:58,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:58,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:46:58,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:58,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 21:46:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:58,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:58,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:58,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:58,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 21:46:58,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:46:58,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-09-24 21:46:58,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:46:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-24 21:46:58,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:59,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570664056] [2020-09-24 21:46:59,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:46:59,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:46:59,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045081158] [2020-09-24 21:46:59,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:46:59,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:59,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:46:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:46:59,298 INFO L87 Difference]: Start difference. First operand 1356 states and 1598 transitions. Second operand 9 states. [2020-09-24 21:47:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:47:06,282 INFO L93 Difference]: Finished difference Result 1792 states and 2258 transitions. [2020-09-24 21:47:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:47:06,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 159 [2020-09-24 21:47:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:47:06,295 INFO L225 Difference]: With dead ends: 1792 [2020-09-24 21:47:06,295 INFO L226 Difference]: Without dead ends: 1790 [2020-09-24 21:47:06,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:47:06,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2020-09-24 21:47:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1555. [2020-09-24 21:47:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1555 states. [2020-09-24 21:47:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 1927 transitions. [2020-09-24 21:47:06,341 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 1927 transitions. Word has length 159 [2020-09-24 21:47:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:47:06,342 INFO L479 AbstractCegarLoop]: Abstraction has 1555 states and 1927 transitions. [2020-09-24 21:47:06,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:47:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 1927 transitions. [2020-09-24 21:47:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-09-24 21:47:06,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:47:06,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 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] [2020-09-24 21:47:06,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:47:06,347 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:47:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:47:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1640589309, now seen corresponding path program 1 times [2020-09-24 21:47:06,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:47:06,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550689518] [2020-09-24 21:47:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:47:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:06,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:06,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:06,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:07,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:08,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:08,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:09,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:11,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:11,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-09-24 21:47:11,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:47:11,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-09-24 21:47:11,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:47:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:47:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-09-24 21:47:11,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:47:11,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:47:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:11,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:11,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:11,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:47:11,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:11,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 21:47:11,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:11,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:47:11,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:47:11,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:47:11,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:47:11,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 21:47:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:11,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:11,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:12,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:12,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 21:47:12,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:47:12,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-09-24 21:47:12,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:12,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:47:12,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:47:12,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-24 21:47:12,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 21:47:12,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-24 21:47:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:47:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:47:12,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:47:12,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 21:47:12,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:47:12,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-09-24 21:47:12,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:47:12,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:47:12,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:47:12,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-24 21:47:12,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:47:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-09-24 21:47:12,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550689518] [2020-09-24 21:47:12,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:47:12,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:47:12,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989315657] [2020-09-24 21:47:12,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:47:12,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:47:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:47:12,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:47:12,890 INFO L87 Difference]: Start difference. First operand 1555 states and 1927 transitions. Second operand 7 states.