/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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 [2020-09-24 19:33:52,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:33:52,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:33:52,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:33:52,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:33:52,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:33:52,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:33:52,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:33:52,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:33:52,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:33:52,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:33:52,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:33:52,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:33:52,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:33:52,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:33:52,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:33:52,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:33:52,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:33:52,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:33:52,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:33:52,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:33:52,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:33:52,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:33:52,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:33:52,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:33:52,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:33:52,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:33:52,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:33:52,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:33:52,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:33:52,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:33:52,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:33:52,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:33:52,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:33:52,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:33:52,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:33:52,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:33:52,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:33:52,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:33:52,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:33:52,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:33:52,914 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 19:33:52,958 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:33:52,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:33:52,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:33:52,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:33:52,960 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:33:52,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:33:52,961 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:33:52,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:33:52,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:33:52,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:33:52,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:33:52,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:33:52,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:33:52,964 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:33:52,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:33:52,964 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:33:52,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:33:52,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:33:52,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:33:52,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:33:52,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:33:52,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:33:52,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:33:52,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:33:52,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:33:52,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:33:52,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:33:52,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:33:52,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:33:52,967 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:33:53,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:33:53,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:33:53,462 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:33:53,464 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:33:53,465 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:33:53,466 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 19:33:53,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43016a91f/a3c5f92d8e2d49668f52badff15dbc8e/FLAG92ca8132f [2020-09-24 19:33:54,114 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:33:54,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 19:33:54,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43016a91f/a3c5f92d8e2d49668f52badff15dbc8e/FLAG92ca8132f [2020-09-24 19:33:54,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43016a91f/a3c5f92d8e2d49668f52badff15dbc8e [2020-09-24 19:33:54,478 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:33:54,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:33:54,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:54,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:33:54,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:33:54,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:54" (1/1) ... [2020-09-24 19:33:54,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243023c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54, skipping insertion in model container [2020-09-24 19:33:54,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:54" (1/1) ... [2020-09-24 19:33:54,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:33:54,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:33:54,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:54,786 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:33:54,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:54,833 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:33:54,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54 WrapperNode [2020-09-24 19:33:54,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:54,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:33:54,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:33:54,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:33:54,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54" (1/1) ... [2020-09-24 19:33:54,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54" (1/1) ... [2020-09-24 19:33:54,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54" (1/1) ... [2020-09-24 19:33:54,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54" (1/1) ... [2020-09-24 19:33:54,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54" (1/1) ... [2020-09-24 19:33:54,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54" (1/1) ... [2020-09-24 19:33:54,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54" (1/1) ... [2020-09-24 19:33:54,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:33:54,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:33:54,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:33:54,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:33:54,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54" (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 19:33:55,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:33:55,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:33:55,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:33:55,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:33:55,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:33:55,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:33:55,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:33:55,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:33:55,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:33:55,254 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:33:55,254 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 19:33:55,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:55 BoogieIcfgContainer [2020-09-24 19:33:55,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:33:55,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:33:55,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:33:55,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:33:55,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:33:54" (1/3) ... [2020-09-24 19:33:55,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e284b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:55, skipping insertion in model container [2020-09-24 19:33:55,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:54" (2/3) ... [2020-09-24 19:33:55,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e284b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:55, skipping insertion in model container [2020-09-24 19:33:55,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:55" (3/3) ... [2020-09-24 19:33:55,269 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-24 19:33:55,279 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:33:55,288 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:33:55,310 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:33:55,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:33:55,341 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:33:55,341 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:33:55,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:33:55,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:33:55,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:33:55,342 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:33:55,342 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:33:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-24 19:33:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 19:33:55,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:55,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:55,373 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:55,380 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-24 19:33:55,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:55,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147889991] [2020-09-24 19:33:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:55,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:55,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:55,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 19:33:55,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:55,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-24 19:33:55,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 19:33:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:55,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:33:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:55,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:55,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:55,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:55,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:55,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:33:55,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:55,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:55,701 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 19:33:55,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147889991] [2020-09-24 19:33:55,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:55,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 19:33:55,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97559097] [2020-09-24 19:33:55,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 19:33:55,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:55,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 19:33:55,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 19:33:55,737 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-24 19:33:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:55,764 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-24 19:33:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 19:33:55,765 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-24 19:33:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:55,774 INFO L225 Difference]: With dead ends: 35 [2020-09-24 19:33:55,774 INFO L226 Difference]: Without dead ends: 18 [2020-09-24 19:33:55,778 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 [2020-09-24 19:33:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-24 19:33:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-24 19:33:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-24 19:33:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-24 19:33:55,817 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-09-24 19:33:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:55,817 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-24 19:33:55,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 19:33:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-24 19:33:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 19:33:55,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:55,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:55,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:33:55,819 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:55,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:55,820 INFO L82 PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times [2020-09-24 19:33:55,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:55,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203153129] [2020-09-24 19:33:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:55,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:55,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:55,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:55,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 19:33:55,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:55,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-24 19:33:55,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:55,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:33:55,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 19:33:55,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 19:33:55,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:55,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:55,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:55,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:55,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:55,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:55,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:33:55,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:55,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:55,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:55,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:55,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:55,988 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 19:33:55,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203153129] [2020-09-24 19:33:55,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:55,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:33:55,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425750869] [2020-09-24 19:33:55,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:33:55,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:55,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:33:55,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:33:55,998 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2020-09-24 19:33:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:56,037 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-09-24 19:33:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:33:56,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-24 19:33:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:56,040 INFO L225 Difference]: With dead ends: 34 [2020-09-24 19:33:56,040 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 19:33:56,041 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 [2020-09-24 19:33:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 19:33:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-24 19:33:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 19:33:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-24 19:33:56,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-09-24 19:33:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:56,048 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-24 19:33:56,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:33:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-24 19:33:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 19:33:56,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:56,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:56,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:33:56,051 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:56,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-24 19:33:56,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:56,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493153036] [2020-09-24 19:33:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:56,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:56,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:33:56,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:56,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-24 19:33:56,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:33:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 19:33:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:33:56,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:56,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:56,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:56,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:56,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:56,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:33:56,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:56,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:56,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:56,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:56,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:56,284 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 19:33:56,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493153036] [2020-09-24 19:33:56,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:56,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:33:56,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022310377] [2020-09-24 19:33:56,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:33:56,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:56,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:33:56,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:33:56,288 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-24 19:33:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:56,364 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-09-24 19:33:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:33:56,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-24 19:33:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:56,366 INFO L225 Difference]: With dead ends: 40 [2020-09-24 19:33:56,366 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 19:33:56,367 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 [2020-09-24 19:33:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 19:33:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-24 19:33:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 19:33:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-24 19:33:56,373 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2020-09-24 19:33:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:56,374 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-24 19:33:56,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:33:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-24 19:33:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 19:33:56,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:56,376 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:56,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:33:56,376 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:56,376 INFO L82 PathProgramCache]: Analyzing trace with hash 891941667, now seen corresponding path program 2 times [2020-09-24 19:33:56,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:56,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690914383] [2020-09-24 19:33:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:56,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:56,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:33:56,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:33:56,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-09-24 19:33:56,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:33:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 19:33:56,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:33:56,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:56,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:56,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:56,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:56,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:33:56,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:56,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:56,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 19:33:56,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690914383] [2020-09-24 19:33:56,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:56,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:33:56,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346742619] [2020-09-24 19:33:56,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:33:56,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:56,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:33:56,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:33:56,757 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2020-09-24 19:33:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:56,854 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-24 19:33:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:33:56,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-24 19:33:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:56,856 INFO L225 Difference]: With dead ends: 38 [2020-09-24 19:33:56,856 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 19:33:56,857 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 [2020-09-24 19:33:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 19:33:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-09-24 19:33:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 19:33:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-24 19:33:56,864 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2020-09-24 19:33:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:56,864 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-24 19:33:56,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:33:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-24 19:33:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 19:33:56,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:56,866 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:56,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:33:56,867 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1918594294, now seen corresponding path program 1 times [2020-09-24 19:33:56,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:56,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866930235] [2020-09-24 19:33:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:56,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:57,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:57,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:57,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:57,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 19:33:57,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:57,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-09-24 19:33:57,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:33:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 19:33:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:33:57,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:57,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:57,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:57,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:57,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:57,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:57,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:33:57,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:57,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:57,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866930235] [2020-09-24 19:33:57,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:57,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:33:57,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651167050] [2020-09-24 19:33:57,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:33:57,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:57,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:33:57,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:33:57,736 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2020-09-24 19:33:57,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:57,831 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-09-24 19:33:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:33:57,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-24 19:33:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:57,833 INFO L225 Difference]: With dead ends: 51 [2020-09-24 19:33:57,833 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 19:33:57,834 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 [2020-09-24 19:33:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 19:33:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-24 19:33:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 19:33:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-24 19:33:57,841 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2020-09-24 19:33:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:57,842 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-24 19:33:57,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:33:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-24 19:33:57,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 19:33:57,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:57,843 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:57,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:33:57,844 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:57,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1338804338, now seen corresponding path program 2 times [2020-09-24 19:33:57,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:57,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259251779] [2020-09-24 19:33:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:57,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:57,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:57,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:57,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:58,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:58,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 19:33:58,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:58,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-09-24 19:33:58,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:58,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:33:58,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 19:33:58,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 19:33:58,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:58,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:58,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:58,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:58,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:58,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:58,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:33:58,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:58,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:58,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:58,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:58,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 19:33:58,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259251779] [2020-09-24 19:33:58,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:58,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:33:58,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789865781] [2020-09-24 19:33:58,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:33:58,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:58,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:33:58,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:33:58,457 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 7 states. [2020-09-24 19:33:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:58,564 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-09-24 19:33:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:33:58,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-24 19:33:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:58,568 INFO L225 Difference]: With dead ends: 49 [2020-09-24 19:33:58,568 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 19:33:58,569 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 [2020-09-24 19:33:58,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 19:33:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-24 19:33:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 19:33:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-24 19:33:58,577 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-09-24 19:33:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:58,577 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-24 19:33:58,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:33:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-24 19:33:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 19:33:58,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:58,579 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:58,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:33:58,579 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:58,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1859782885, now seen corresponding path program 3 times [2020-09-24 19:33:58,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:58,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846467414] [2020-09-24 19:33:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:58,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:58,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:58,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:58,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:59,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:59,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 19:33:59,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:59,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-09-24 19:33:59,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:59,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:33:59,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 19:33:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 19:33:59,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:59,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:59,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:59,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:59,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:59,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:59,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:33:59,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:59,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:59,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:59,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:59,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 19:33:59,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846467414] [2020-09-24 19:33:59,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:59,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:33:59,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928099316] [2020-09-24 19:33:59,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:33:59,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:33:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:33:59,462 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2020-09-24 19:33:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:59,647 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-24 19:33:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:33:59,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-09-24 19:33:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:59,649 INFO L225 Difference]: With dead ends: 54 [2020-09-24 19:33:59,649 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 19:33:59,650 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 [2020-09-24 19:33:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 19:33:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-24 19:33:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 19:33:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-09-24 19:33:59,657 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2020-09-24 19:33:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:59,658 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-09-24 19:33:59,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:33:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-09-24 19:33:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-24 19:33:59,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:59,660 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:59,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:33:59,660 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:59,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:59,661 INFO L82 PathProgramCache]: Analyzing trace with hash 350505490, now seen corresponding path program 4 times [2020-09-24 19:33:59,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:59,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213006172] [2020-09-24 19:33:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:59,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:59,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:59,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:00,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:00,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:34:00,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:34:00,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-09-24 19:34:00,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:00,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:34:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 19:34:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 19:34:00,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:00,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:00,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:00,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:00,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:34:00,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:00,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:34:00,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:00,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 27 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 19:34:00,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213006172] [2020-09-24 19:34:00,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:34:00,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:34:00,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022106385] [2020-09-24 19:34:00,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:34:00,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:00,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:34:00,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:34:00,397 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 11 states. [2020-09-24 19:34:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:00,561 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-09-24 19:34:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 19:34:00,561 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-09-24 19:34:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:00,562 INFO L225 Difference]: With dead ends: 59 [2020-09-24 19:34:00,563 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 19:34:00,563 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 [2020-09-24 19:34:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 19:34:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-09-24 19:34:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 19:34:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-24 19:34:00,569 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 45 [2020-09-24 19:34:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:00,570 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-24 19:34:00,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:34:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-24 19:34:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 19:34:00,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:00,572 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:00,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:34:00,572 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 5 times [2020-09-24 19:34:00,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:00,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343916770] [2020-09-24 19:34:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:00,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:01,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:01,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 19:34:01,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:34:01,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-09-24 19:34:01,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:01,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 19:34:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 19:34:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 19:34:01,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:01,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:01,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:01,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:01,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:34:01,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:01,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:34:01,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:01,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:01,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:01,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:01,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 59 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 19:34:01,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343916770] [2020-09-24 19:34:01,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:34:01,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 19:34:01,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218761182] [2020-09-24 19:34:01,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 19:34:01,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:01,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 19:34:01,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:34:01,278 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2020-09-24 19:34:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:01,533 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-24 19:34:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 19:34:01,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-09-24 19:34:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:01,535 INFO L225 Difference]: With dead ends: 61 [2020-09-24 19:34:01,535 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 19:34:01,536 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 [2020-09-24 19:34:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 19:34:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-24 19:34:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 19:34:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-24 19:34:01,542 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2020-09-24 19:34:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:01,542 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-24 19:34:01,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 19:34:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-24 19:34:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 19:34:01,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:01,544 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:01,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:34:01,544 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 6 times [2020-09-24 19:34:01,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:01,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948423819] [2020-09-24 19:34:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:34:01,556 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:34:01,556 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:34:01,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:34:01,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:34:01 BoogieIcfgContainer [2020-09-24 19:34:01,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:34:01,584 INFO L168 Benchmark]: Toolchain (without parser) took 7102.69 ms. Allocated memory was 139.5 MB in the beginning and 282.6 MB in the end (delta: 143.1 MB). Free memory was 102.8 MB in the beginning and 193.1 MB in the end (delta: -90.3 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:01,585 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:34:01,585 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.52 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:01,586 INFO L168 Benchmark]: Boogie Preprocessor took 125.07 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:01,587 INFO L168 Benchmark]: RCFGBuilder took 297.97 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 169.0 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:01,588 INFO L168 Benchmark]: TraceAbstraction took 6319.81 ms. Allocated memory was 201.9 MB in the beginning and 282.6 MB in the end (delta: 80.7 MB). Free memory was 169.0 MB in the beginning and 193.1 MB in the end (delta: -24.1 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:01,592 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 350.52 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.07 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 180.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 297.97 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 169.0 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6319.81 ms. Allocated memory was 201.9 MB in the beginning and 282.6 MB in the end (delta: 80.7 MB). Free memory was 169.0 MB in the beginning and 193.1 MB in the end (delta: -24.1 MB). Peak memory consumption was 56.7 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: 6.2s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 104 SDslu, 408 SDs, 0 SdLazy, 274 SolverSat, 51 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, 0.9s 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, 4.6s InterpolantComputationTime, 320 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 16192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 221/322 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...