/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/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:50:16,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:50:16,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:50:16,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:50:16,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:50:16,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:50:16,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:50:16,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:50:16,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:50:16,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:50:16,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:50:16,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:50:16,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:50:16,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:50:16,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:50:16,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:50:16,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:50:16,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:50:16,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:50:16,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:50:16,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:50:16,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:50:16,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:50:16,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:50:16,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:50:16,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:50:16,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:50:16,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:50:16,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:50:16,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:50:16,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:50:16,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:50:16,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:50:16,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:50:16,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:50:16,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:50:16,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:50:16,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:50:16,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:50:16,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:50:16,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:50:16,856 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 21:50:16,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:50:16,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:50:16,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:50:16,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:50:16,884 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:50:16,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:50:16,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:50:16,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:50:16,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:50:16,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:50:16,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:50:16,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:50:16,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:50:16,886 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:50:16,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:50:16,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:50:16,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:50:16,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:50:16,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:50:16,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:50:16,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:50:16,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:16,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:50:16,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:50:16,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:50:16,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:50:16,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:50:16,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:50:16,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:50:16,890 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 21:50:17,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:50:17,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:50:17,394 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:50:17,396 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:50:17,397 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:50:17,398 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-24 21:50:17,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/660ae6bf9/9f73277c96874d658a772736b62acabe/FLAG8676b1962 [2020-09-24 21:50:18,043 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:50:18,044 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-24 21:50:18,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/660ae6bf9/9f73277c96874d658a772736b62acabe/FLAG8676b1962 [2020-09-24 21:50:18,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/660ae6bf9/9f73277c96874d658a772736b62acabe [2020-09-24 21:50:18,403 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:50:18,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:50:18,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:18,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:50:18,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:50:18,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab12f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18, skipping insertion in model container [2020-09-24 21:50:18,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:50:18,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:50:18,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:18,686 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:50:18,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:18,737 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:50:18,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18 WrapperNode [2020-09-24 21:50:18,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:18,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:50:18,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:50:18,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:50:18,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18" (1/1) ... [2020-09-24 21:50:18,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:50:18,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:50:18,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:50:18,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:50:18,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:18,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:50:18,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:50:18,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:50:18,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:50:18,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:50:18,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:50:18,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:50:18,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:50:18,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:50:18,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:50:18,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:50:18,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:50:18,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:50:19,172 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:50:19,172 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:50:19,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:19 BoogieIcfgContainer [2020-09-24 21:50:19,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:50:19,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:50:19,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:50:19,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:50:19,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:50:18" (1/3) ... [2020-09-24 21:50:19,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625bdda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:19, skipping insertion in model container [2020-09-24 21:50:19,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:18" (2/3) ... [2020-09-24 21:50:19,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625bdda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:19, skipping insertion in model container [2020-09-24 21:50:19,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:19" (3/3) ... [2020-09-24 21:50:19,212 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-09-24 21:50:19,232 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:50:19,242 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:50:19,279 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:50:19,313 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:50:19,313 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:50:19,313 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:50:19,314 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:50:19,314 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:50:19,314 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:50:19,314 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:50:19,314 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:50:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-24 21:50:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 21:50:19,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:19,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:19,346 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-09-24 21:50:19,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:19,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73902686] [2020-09-24 21:50:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:19,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:19,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:50:19,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:19,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-24 21:50:19,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:19,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:19,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:50:19,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:19,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:50:19,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:19,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:19,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:19,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:19,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:50:19,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:19,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:19,712 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 21:50:19,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73902686] [2020-09-24 21:50:19,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:19,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:50:19,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559227652] [2020-09-24 21:50:19,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:50:19,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:19,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:50:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:19,746 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-09-24 21:50:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:19,852 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-09-24 21:50:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:50:19,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-24 21:50:19,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:19,866 INFO L225 Difference]: With dead ends: 45 [2020-09-24 21:50:19,867 INFO L226 Difference]: Without dead ends: 21 [2020-09-24 21:50:19,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-24 21:50:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-24 21:50:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-24 21:50:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-24 21:50:19,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-24 21:50:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:19,915 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-24 21:50:19,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:50:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-24 21:50:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 21:50:19,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:19,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:19,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:50:19,917 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:19,918 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-09-24 21:50:19,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:19,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494708991] [2020-09-24 21:50:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:19,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:20,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:50:20,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:20,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 21:50:20,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:20,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:50:20,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:50:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:20,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:20,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:20,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:20,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:20,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:50:20,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:20,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:20,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:20,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:20,080 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 21:50:20,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494708991] [2020-09-24 21:50:20,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:20,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:50:20,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614401338] [2020-09-24 21:50:20,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:50:20,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:20,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:50:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:50:20,088 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-09-24 21:50:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:20,165 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-24 21:50:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:50:20,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-24 21:50:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:20,167 INFO L225 Difference]: With dead ends: 31 [2020-09-24 21:50:20,167 INFO L226 Difference]: Without dead ends: 25 [2020-09-24 21:50:20,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:50:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-24 21:50:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-24 21:50:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 21:50:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-24 21:50:20,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-24 21:50:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:20,176 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-24 21:50:20,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:50:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-24 21:50:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 21:50:20,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:20,177 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] [2020-09-24 21:50:20,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:50:20,178 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:20,178 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-09-24 21:50:20,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:20,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956883452] [2020-09-24 21:50:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:20,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:20,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 21:50:20,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:20,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-09-24 21:50:20,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:20,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:20,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:20,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:50:20,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:50:20,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:20,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:20,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:20,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:20,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:50:20,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:20,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:20,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956883452] [2020-09-24 21:50:20,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:20,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:50:20,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4421580] [2020-09-24 21:50:20,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:50:20,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:20,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:50:20,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:20,679 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-09-24 21:50:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:20,783 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-24 21:50:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:50:20,783 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-24 21:50:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:20,784 INFO L225 Difference]: With dead ends: 36 [2020-09-24 21:50:20,785 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 21:50:20,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 21:50:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-24 21:50:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 21:50:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 21:50:20,792 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-24 21:50:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:20,793 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 21:50:20,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:50:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 21:50:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 21:50:20,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:20,794 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:20,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:50:20,795 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:20,796 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-09-24 21:50:20,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:20,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478200064] [2020-09-24 21:50:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:20,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:21,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 21:50:21,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:50:21,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1050 [2020-09-24 21:50:21,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:50:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:21,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:21,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:21,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:21,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:21,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:21,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:21,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:21,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:21,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:21,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478200064] [2020-09-24 21:50:21,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:21,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:50:21,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262861215] [2020-09-24 21:50:21,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:50:21,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:50:21,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:21,951 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-24 21:50:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:22,092 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-24 21:50:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:50:22,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-24 21:50:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:22,094 INFO L225 Difference]: With dead ends: 41 [2020-09-24 21:50:22,094 INFO L226 Difference]: Without dead ends: 35 [2020-09-24 21:50:22,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-24 21:50:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-24 21:50:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 21:50:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 21:50:22,103 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-24 21:50:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:22,104 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 21:50:22,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:50:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 21:50:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 21:50:22,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:22,105 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:22,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:50:22,106 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:22,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2101454679, now seen corresponding path program 3 times [2020-09-24 21:50:22,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:22,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802928816] [2020-09-24 21:50:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:22,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:23,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 21:50:23,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:50:23,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-09-24 21:50:23,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:23,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:23,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:23,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:50:23,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:23,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:23,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:23,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:23,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:23,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:23,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:23,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:23,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:23,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:23,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:23,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802928816] [2020-09-24 21:50:23,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:23,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:50:23,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316942823] [2020-09-24 21:50:23,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:50:23,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:23,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:50:23,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:50:23,767 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2020-09-24 21:50:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:23,937 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-24 21:50:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:50:23,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-24 21:50:23,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:23,939 INFO L225 Difference]: With dead ends: 46 [2020-09-24 21:50:23,939 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 21:50:23,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:50:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 21:50:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-24 21:50:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 21:50:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-24 21:50:23,947 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-24 21:50:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:23,948 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-24 21:50:23,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:50:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-24 21:50:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:50:23,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:23,949 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:23,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:50:23,950 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:23,950 INFO L82 PathProgramCache]: Analyzing trace with hash -888787463, now seen corresponding path program 4 times [2020-09-24 21:50:23,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:23,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255724526] [2020-09-24 21:50:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:23,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:25,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 21:50:25,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:50:25,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1799 [2020-09-24 21:50:25,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:25,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:25,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:25,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 21:50:25,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:25,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:25,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:25,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:25,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:25,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:25,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:25,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:25,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255724526] [2020-09-24 21:50:25,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:25,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:50:25,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672965693] [2020-09-24 21:50:25,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:25,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:25,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:25,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:25,947 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-09-24 21:50:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:26,235 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-24 21:50:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:50:26,237 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-09-24 21:50:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:26,238 INFO L225 Difference]: With dead ends: 51 [2020-09-24 21:50:26,238 INFO L226 Difference]: Without dead ends: 45 [2020-09-24 21:50:26,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:50:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-24 21:50:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-09-24 21:50:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 21:50:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 21:50:26,246 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-24 21:50:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:26,247 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 21:50:26,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 21:50:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 21:50:26,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:26,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:26,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:50:26,249 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:26,250 INFO L82 PathProgramCache]: Analyzing trace with hash 899054743, now seen corresponding path program 5 times [2020-09-24 21:50:26,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:26,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880022368] [2020-09-24 21:50:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:26,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:28,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:30,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 21:50:30,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:50:30,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4499 [2020-09-24 21:50:30,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:30,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:50:30,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:30,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 21:50:30,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:30,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:30,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:30,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:30,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:30,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:50:30,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:30,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:30,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880022368] [2020-09-24 21:50:30,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:30,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:50:30,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76551701] [2020-09-24 21:50:30,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:50:30,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:30,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:50:30,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:50:30,970 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 14 states. [2020-09-24 21:50:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:31,324 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-24 21:50:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:50:31,325 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-09-24 21:50:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:31,326 INFO L225 Difference]: With dead ends: 56 [2020-09-24 21:50:31,326 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 21:50:31,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:50:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 21:50:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-24 21:50:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 21:50:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-24 21:50:31,339 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-24 21:50:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:31,340 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-24 21:50:31,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:50:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-24 21:50:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:50:31,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:31,344 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:31,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:50:31,345 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash 212115641, now seen corresponding path program 6 times [2020-09-24 21:50:31,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:31,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945438071] [2020-09-24 21:50:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:31,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:31,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:31,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:31,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:32,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:34,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:36,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:36,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 21:50:36,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:50:36,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-24 21:50:36,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:50:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:50:36,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:36,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:36,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:36,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:36,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:36,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:36,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:36,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:36,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945438071] [2020-09-24 21:50:36,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:36,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:50:36,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318039046] [2020-09-24 21:50:36,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:50:36,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:36,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:50:36,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:50:36,591 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2020-09-24 21:50:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:36,925 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-09-24 21:50:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:50:36,926 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-09-24 21:50:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:36,927 INFO L225 Difference]: With dead ends: 61 [2020-09-24 21:50:36,927 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 21:50:36,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:50:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 21:50:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-24 21:50:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 21:50:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-24 21:50:36,939 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-24 21:50:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:36,941 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-24 21:50:36,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:50:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-24 21:50:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 21:50:36,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:36,942 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:36,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:50:36,943 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:36,943 INFO L82 PathProgramCache]: Analyzing trace with hash 382845399, now seen corresponding path program 7 times [2020-09-24 21:50:36,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:36,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922050480] [2020-09-24 21:50:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:36,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:37,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:38,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:38,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:41,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:41,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:50:41,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:50:41,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 21:50:41,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:41,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:50:41,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:41,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 21:50:41,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:42,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:42,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:42,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:42,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:42,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:42,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:42,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:42,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:42,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:42,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:42,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:42,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922050480] [2020-09-24 21:50:42,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:42,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 21:50:42,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618355759] [2020-09-24 21:50:42,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:50:42,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:42,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:50:42,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:50:42,186 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 18 states. [2020-09-24 21:50:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:42,535 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-09-24 21:50:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:50:42,536 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-09-24 21:50:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:42,538 INFO L225 Difference]: With dead ends: 66 [2020-09-24 21:50:42,538 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 21:50:42,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:50:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 21:50:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-09-24 21:50:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 21:50:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-24 21:50:42,548 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-24 21:50:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:42,549 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-24 21:50:42,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:50:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-24 21:50:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 21:50:42,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:42,550 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:42,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:50:42,551 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:42,551 INFO L82 PathProgramCache]: Analyzing trace with hash -471686279, now seen corresponding path program 8 times [2020-09-24 21:50:42,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:42,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818404959] [2020-09-24 21:50:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:42,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:42,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:43,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:44,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:45,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:47,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:47,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:47,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 21:50:47,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:50:47,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-24 21:50:47,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:47,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:50:47,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:47,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 21:50:47,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:47,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:47,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:47,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:47,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:47,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:47,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:47,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:47,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:47,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:47,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:47,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818404959] [2020-09-24 21:50:47,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:47,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:50:47,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995491490] [2020-09-24 21:50:47,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:50:47,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:50:47,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:50:47,827 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2020-09-24 21:50:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:48,226 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-24 21:50:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 21:50:48,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-09-24 21:50:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:48,229 INFO L225 Difference]: With dead ends: 71 [2020-09-24 21:50:48,229 INFO L226 Difference]: Without dead ends: 65 [2020-09-24 21:50:48,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:50:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-24 21:50:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-24 21:50:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 21:50:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-24 21:50:48,236 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-24 21:50:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:48,236 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-24 21:50:48,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:50:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-24 21:50:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 21:50:48,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:48,238 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:48,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:50:48,238 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:48,239 INFO L82 PathProgramCache]: Analyzing trace with hash -945326313, now seen corresponding path program 9 times [2020-09-24 21:50:48,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:48,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621057226] [2020-09-24 21:50:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:48,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:48,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:49,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:49,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:50,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:50,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:51,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:53,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:53,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:53,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 21:50:53,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:50:53,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5148 [2020-09-24 21:50:53,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:53,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:50:53,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:53,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 21:50:53,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:53,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:53,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:53,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:53,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:53,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:53,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:53,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:53,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:53,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:53,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:53,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:53,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621057226] [2020-09-24 21:50:53,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:53,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 21:50:53,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707006969] [2020-09-24 21:50:53,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 21:50:53,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:53,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 21:50:53,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:50:53,738 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2020-09-24 21:50:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:54,239 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-09-24 21:50:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 21:50:54,240 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-09-24 21:50:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:54,241 INFO L225 Difference]: With dead ends: 76 [2020-09-24 21:50:54,241 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 21:50:54,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 21:50:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 21:50:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-09-24 21:50:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 21:50:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-24 21:50:54,251 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-24 21:50:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:54,251 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-24 21:50:54,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 21:50:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-24 21:50:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 21:50:54,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:54,253 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:54,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:50:54,253 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1165216199, now seen corresponding path program 10 times [2020-09-24 21:50:54,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:54,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985851962] [2020-09-24 21:50:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:54,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:54,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:55,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:55,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:57,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:57,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:57,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:58,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:59,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:59,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 21:50:59,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:50:59,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:50:59,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:50:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:50:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 21:50:59,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:59,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:59,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:59,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:59,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:59,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:59,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:59,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:59,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:59,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985851962] [2020-09-24 21:50:59,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:59,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 21:50:59,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462077932] [2020-09-24 21:50:59,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 21:50:59,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:59,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 21:50:59,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:50:59,611 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 24 states. [2020-09-24 21:51:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:00,220 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-09-24 21:51:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:51:00,221 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-09-24 21:51:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:00,222 INFO L225 Difference]: With dead ends: 81 [2020-09-24 21:51:00,223 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 21:51:00,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 21:51:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 21:51:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-24 21:51:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 21:51:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-24 21:51:00,235 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-09-24 21:51:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:00,235 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-24 21:51:00,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 21:51:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-24 21:51:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 21:51:00,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:00,237 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:00,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:51:00,237 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:00,237 INFO L82 PathProgramCache]: Analyzing trace with hash 499883095, now seen corresponding path program 11 times [2020-09-24 21:51:00,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:00,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610062204] [2020-09-24 21:51:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:00,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:00,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:00,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:00,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:01,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:01,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:02,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:05,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:05,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:05,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 21:51:05,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:51:05,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5266 [2020-09-24 21:51:05,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:05,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:51:05,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:51:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 21:51:05,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:05,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:05,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:05,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:51:05,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:05,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:51:05,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:05,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:05,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:05,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:05,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:05,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610062204] [2020-09-24 21:51:05,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:05,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 21:51:05,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106460511] [2020-09-24 21:51:05,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 21:51:05,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 21:51:05,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:51:05,906 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 26 states. [2020-09-24 21:51:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:06,532 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-09-24 21:51:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 21:51:06,533 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-09-24 21:51:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:06,534 INFO L225 Difference]: With dead ends: 86 [2020-09-24 21:51:06,534 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 21:51:06,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 21:51:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 21:51:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-09-24 21:51:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 21:51:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-09-24 21:51:06,546 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-09-24 21:51:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:06,547 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-09-24 21:51:06,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 21:51:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-09-24 21:51:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 21:51:06,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:06,550 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:06,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 21:51:06,551 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:06,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:06,551 INFO L82 PathProgramCache]: Analyzing trace with hash 728586489, now seen corresponding path program 12 times [2020-09-24 21:51:06,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:06,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603792097] [2020-09-24 21:51:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat