/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:09:44,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:09:44,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:09:44,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:09:44,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:09:44,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:09:44,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:09:44,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:09:44,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:09:44,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:09:44,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:09:44,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:09:44,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:09:44,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:09:44,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:09:44,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:09:44,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:09:44,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:09:44,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:09:44,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:09:44,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:09:44,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:09:44,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:09:44,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:09:44,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:09:44,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:09:44,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:09:44,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:09:44,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:09:44,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:09:44,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:09:44,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:09:44,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:09:44,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:09:44,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:09:44,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:09:44,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:09:44,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:09:44,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:09:44,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:09:44,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:09:44,877 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 [2020-09-25 01:09:44,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:09:44,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:09:44,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:09:44,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:09:44,937 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:09:44,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:09:44,938 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:09:44,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:09:44,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:09:44,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:09:44,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:09:44,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:09:44,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:09:44,941 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:09:44,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:09:44,941 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:09:44,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:09:44,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:09:44,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:09:44,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:09:44,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:09:44,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:09:44,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:09:44,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:09:44,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:09:44,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:09:44,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:09:44,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:09:44,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:09:44,944 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:09:45,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:09:45,406 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:09:45,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:09:45,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:09:45,414 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:09:45,416 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 01:09:45,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47625cb33/35deb6a45ae74b0e98943746721c7871/FLAG1e33ed374 [2020-09-25 01:09:46,143 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:09:46,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 01:09:46,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47625cb33/35deb6a45ae74b0e98943746721c7871/FLAG1e33ed374 [2020-09-25 01:09:46,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47625cb33/35deb6a45ae74b0e98943746721c7871 [2020-09-25 01:09:46,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:09:46,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:09:46,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:46,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:09:46,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:09:46,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:46" (1/1) ... [2020-09-25 01:09:46,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e8547d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46, skipping insertion in model container [2020-09-25 01:09:46,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:46" (1/1) ... [2020-09-25 01:09:46,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:09:46,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:09:46,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:46,762 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:09:46,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:46,801 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:09:46,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46 WrapperNode [2020-09-25 01:09:46,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:46,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:09:46,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:09:46,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:09:46,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46" (1/1) ... [2020-09-25 01:09:46,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46" (1/1) ... [2020-09-25 01:09:46,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46" (1/1) ... [2020-09-25 01:09:46,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46" (1/1) ... [2020-09-25 01:09:46,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46" (1/1) ... [2020-09-25 01:09:46,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46" (1/1) ... [2020-09-25 01:09:46,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46" (1/1) ... [2020-09-25 01:09:46,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:09:46,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:09:46,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:09:46,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:09:46,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46" (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 [2020-09-25 01:09:46,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:09:46,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:09:46,992 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:09:46,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:09:46,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:09:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:09:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:09:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:09:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:09:47,191 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:09:47,192 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 01:09:47,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:47 BoogieIcfgContainer [2020-09-25 01:09:47,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:09:47,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:09:47,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:09:47,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:09:47,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:09:46" (1/3) ... [2020-09-25 01:09:47,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1d7ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:47, skipping insertion in model container [2020-09-25 01:09:47,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:46" (2/3) ... [2020-09-25 01:09:47,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1d7ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:47, skipping insertion in model container [2020-09-25 01:09:47,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:47" (3/3) ... [2020-09-25 01:09:47,209 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-25 01:09:47,222 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:09:47,232 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:09:47,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:09:47,286 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:09:47,286 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:09:47,286 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:09:47,287 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:09:47,287 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:09:47,287 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:09:47,287 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:09:47,287 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:09:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-25 01:09:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 01:09:47,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:47,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:47,320 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-25 01:09:47,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:47,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421240146] [2020-09-25 01:09:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 01:09:47,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:47,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-09-25 01:09:47,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 01:09:47,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:47,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 01:09:47,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:47,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:47,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:09:47,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:47,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:47,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421240146] [2020-09-25 01:09:47,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:47,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 01:09:47,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525376551] [2020-09-25 01:09:47,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 01:09:47,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:47,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 01:09:47,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:09:47,708 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-25 01:09:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:47,732 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-25 01:09:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 01:09:47,733 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 01:09:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:47,742 INFO L225 Difference]: With dead ends: 35 [2020-09-25 01:09:47,743 INFO L226 Difference]: Without dead ends: 18 [2020-09-25 01:09:47,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:09:47,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-25 01:09:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-25 01:09:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-25 01:09:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-25 01:09:47,797 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-09-25 01:09:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:47,798 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-25 01:09:47,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 01:09:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-25 01:09:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 01:09:47,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:47,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:47,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:09:47,800 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:47,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:47,801 INFO L82 PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times [2020-09-25 01:09:47,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:47,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593251022] [2020-09-25 01:09:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 01:09:47,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:47,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-25 01:09:47,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:09:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 01:09:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 01:09:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:09:48,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:48,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:48,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:09:48,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:48,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:48,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:48,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:48,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593251022] [2020-09-25 01:09:48,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:48,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 01:09:48,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983036501] [2020-09-25 01:09:48,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 01:09:48,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:48,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 01:09:48,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:09:48,017 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2020-09-25 01:09:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:48,055 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-09-25 01:09:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 01:09:48,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-25 01:09:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:48,058 INFO L225 Difference]: With dead ends: 34 [2020-09-25 01:09:48,058 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 01:09:48,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:09:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 01:09:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-25 01:09:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-25 01:09:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-25 01:09:48,066 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-09-25 01:09:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:48,066 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-25 01:09:48,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 01:09:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-25 01:09:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 01:09:48,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:48,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:48,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:09:48,069 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-25 01:09:48,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:48,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701108742] [2020-09-25 01:09:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 01:09:48,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:48,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-09-25 01:09:48,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:09:48,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:48,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 01:09:48,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:48,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:48,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:48,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:48,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:48,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701108742] [2020-09-25 01:09:48,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:48,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:09:48,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959103286] [2020-09-25 01:09:48,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:09:48,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:48,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:09:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:48,345 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-25 01:09:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:48,442 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-09-25 01:09:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 01:09:48,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-25 01:09:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:48,444 INFO L225 Difference]: With dead ends: 32 [2020-09-25 01:09:48,444 INFO L226 Difference]: Without dead ends: 27 [2020-09-25 01:09:48,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:09:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-25 01:09:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-09-25 01:09:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 01:09:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-25 01:09:48,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-09-25 01:09:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:48,459 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-25 01:09:48,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:09:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-25 01:09:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-25 01:09:48,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:48,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:48,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:09:48,461 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash -425824350, now seen corresponding path program 1 times [2020-09-25 01:09:48,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:48,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614655805] [2020-09-25 01:09:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 01:09:48,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:09:48,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-09-25 01:09:48,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:09:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 01:09:48,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:48,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:48,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:48,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:48,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:48,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:48,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:48,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:48,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614655805] [2020-09-25 01:09:48,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:48,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 01:09:48,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103531696] [2020-09-25 01:09:48,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 01:09:48,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:48,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 01:09:48,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:09:48,853 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-09-25 01:09:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:48,990 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-09-25 01:09:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 01:09:48,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-25 01:09:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:48,994 INFO L225 Difference]: With dead ends: 37 [2020-09-25 01:09:48,995 INFO L226 Difference]: Without dead ends: 32 [2020-09-25 01:09:48,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:09:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-25 01:09:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-09-25 01:09:49,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-25 01:09:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-09-25 01:09:49,003 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-09-25 01:09:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:49,004 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-09-25 01:09:49,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 01:09:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-09-25 01:09:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 01:09:49,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:49,006 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:49,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:09:49,006 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash 374672875, now seen corresponding path program 2 times [2020-09-25 01:09:49,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:49,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849078112] [2020-09-25 01:09:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:49,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:49,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 01:09:49,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:09:49,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-09-25 01:09:49,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:09:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 01:09:49,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:49,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:49,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:49,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:49,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:49,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:49,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:49,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:49,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:49,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:49,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:49,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849078112] [2020-09-25 01:09:49,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:49,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 01:09:49,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807324651] [2020-09-25 01:09:49,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 01:09:49,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 01:09:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 01:09:49,596 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-09-25 01:09:49,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:49,737 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-09-25 01:09:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 01:09:49,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-09-25 01:09:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:49,739 INFO L225 Difference]: With dead ends: 42 [2020-09-25 01:09:49,739 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 01:09:49,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 01:09:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 01:09:49,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-25 01:09:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 01:09:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-09-25 01:09:49,748 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2020-09-25 01:09:49,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:49,748 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-09-25 01:09:49,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 01:09:49,749 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-09-25 01:09:49,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 01:09:49,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:49,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:49,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:09:49,751 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:49,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:49,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1654846786, now seen corresponding path program 3 times [2020-09-25 01:09:49,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:49,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717819542] [2020-09-25 01:09:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:49,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:50,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 01:09:50,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:09:50,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-09-25 01:09:50,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:50,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:09:50,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:50,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 01:09:50,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:50,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:50,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:50,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:50,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:50,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:50,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:50,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:50,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:50,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:50,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:50,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717819542] [2020-09-25 01:09:50,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:50,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 01:09:50,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234033116] [2020-09-25 01:09:50,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 01:09:50,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 01:09:50,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:09:50,546 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2020-09-25 01:09:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:50,731 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-09-25 01:09:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 01:09:50,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-09-25 01:09:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:50,732 INFO L225 Difference]: With dead ends: 47 [2020-09-25 01:09:50,732 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 01:09:50,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 01:09:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 01:09:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-09-25 01:09:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-25 01:09:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-09-25 01:09:50,740 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2020-09-25 01:09:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:50,740 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-09-25 01:09:50,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 01:09:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-09-25 01:09:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 01:09:50,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:50,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:50,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:09:50,742 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:50,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2107438005, now seen corresponding path program 4 times [2020-09-25 01:09:50,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:50,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419870026] [2020-09-25 01:09:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:50,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:51,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:51,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:51,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 01:09:51,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:09:51,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-09-25 01:09:51,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:51,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:09:51,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:51,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 01:09:51,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:51,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:51,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:51,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:51,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:51,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:51,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:51,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:51,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:51,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419870026] [2020-09-25 01:09:51,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:51,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 01:09:51,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939568671] [2020-09-25 01:09:51,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 01:09:51,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:51,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 01:09:51,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 01:09:51,550 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 13 states. [2020-09-25 01:09:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:51,794 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-09-25 01:09:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 01:09:51,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-09-25 01:09:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:51,796 INFO L225 Difference]: With dead ends: 49 [2020-09-25 01:09:51,797 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 01:09:51,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 01:09:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 01:09:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-25 01:09:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 01:09:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-09-25 01:09:51,804 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 38 [2020-09-25 01:09:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:51,804 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-09-25 01:09:51,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 01:09:51,805 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-09-25 01:09:51,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 01:09:51,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:51,806 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:51,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:09:51,807 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:51,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1988824350, now seen corresponding path program 5 times [2020-09-25 01:09:51,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:51,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855722134] [2020-09-25 01:09:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:51,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:51,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:51,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:52,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:52,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 01:09:52,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:09:52,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-09-25 01:09:52,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:09:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 01:09:52,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 01:09:52,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:52,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:52,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:52,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:52,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:52,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:52,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:52,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:52,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-25 01:09:52,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855722134] [2020-09-25 01:09:52,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:52,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 01:09:52,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660497710] [2020-09-25 01:09:52,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:09:52,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:09:52,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:52,277 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 5 states. [2020-09-25 01:09:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:52,325 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2020-09-25 01:09:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 01:09:52,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-09-25 01:09:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:52,327 INFO L225 Difference]: With dead ends: 88 [2020-09-25 01:09:52,327 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 01:09:52,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:09:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 01:09:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-09-25 01:09:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 01:09:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-09-25 01:09:52,334 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2020-09-25 01:09:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:52,334 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-09-25 01:09:52,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:09:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-09-25 01:09:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 01:09:52,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:52,336 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:52,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 01:09:52,337 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2033144394, now seen corresponding path program 6 times [2020-09-25 01:09:52,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:52,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289718480] [2020-09-25 01:09:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:52,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:52,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:52,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:52,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 01:09:52,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:52,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-09-25 01:09:52,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:09:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 01:09:52,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 01:09:52,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:52,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:52,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:52,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:52,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:52,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:52,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:52,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:52,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:52,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-09-25 01:09:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-25 01:09:52,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289718480] [2020-09-25 01:09:52,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:52,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 01:09:52,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955693217] [2020-09-25 01:09:52,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 01:09:52,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:52,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 01:09:52,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:09:52,871 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 7 states. [2020-09-25 01:09:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:52,953 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-09-25 01:09:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 01:09:52,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-09-25 01:09:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:52,955 INFO L225 Difference]: With dead ends: 91 [2020-09-25 01:09:52,955 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 01:09:52,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:09:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 01:09:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-25 01:09:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 01:09:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-25 01:09:52,962 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 49 [2020-09-25 01:09:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:52,962 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-25 01:09:52,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 01:09:52,963 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-25 01:09:52,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 01:09:52,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:52,964 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:52,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 01:09:52,964 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:52,965 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 7 times [2020-09-25 01:09:52,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:52,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800688588] [2020-09-25 01:09:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 01:09:52,977 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 01:09:52,978 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 01:09:52,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 01:09:53,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:09:53 BoogieIcfgContainer [2020-09-25 01:09:53,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:09:53,007 INFO L168 Benchmark]: Toolchain (without parser) took 6508.34 ms. Allocated memory was 139.5 MB in the beginning and 283.6 MB in the end (delta: 144.2 MB). Free memory was 103.2 MB in the beginning and 238.1 MB in the end (delta: -134.9 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:53,008 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-25 01:09:53,009 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.36 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:53,010 INFO L168 Benchmark]: Boogie Preprocessor took 112.23 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 93.2 MB in the beginning and 181.6 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:53,010 INFO L168 Benchmark]: RCFGBuilder took 281.40 ms. Allocated memory is still 201.9 MB. Free memory was 181.6 MB in the beginning and 169.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:53,011 INFO L168 Benchmark]: TraceAbstraction took 5805.21 ms. Allocated memory was 201.9 MB in the beginning and 283.6 MB in the end (delta: 81.8 MB). Free memory was 168.6 MB in the beginning and 238.1 MB in the end (delta: -69.5 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:53,015 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.36 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.23 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 93.2 MB in the beginning and 181.6 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.40 ms. Allocated memory is still 201.9 MB. Free memory was 181.6 MB in the beginning and 169.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5805.21 ms. Allocated memory was 201.9 MB in the beginning and 283.6 MB in the end (delta: 81.8 MB). Free memory was 168.6 MB in the beginning and 238.1 MB in the end (delta: -69.5 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 98 SDslu, 449 SDs, 0 SdLazy, 285 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 311 NumberOfCodeBlocks, 311 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 247 ConstructedInterpolants, 0 QuantifiedInterpolants, 14793 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 207/309 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...