/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:10:41,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:10:41,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:10:41,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:10:41,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:10:41,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:10:41,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:10:41,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:10:41,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:10:41,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:10:41,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:10:41,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:10:41,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:10:41,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:10:41,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:10:41,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:10:41,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:10:41,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:10:41,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:10:41,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:10:41,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:10:41,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:10:41,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:10:41,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:10:41,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:10:41,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:10:41,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:10:41,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:10:41,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:10:41,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:10:41,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:10:41,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:10:41,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:10:41,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:10:41,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:10:41,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:10:41,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:10:41,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:10:41,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:10:41,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:10:41,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:10:41,906 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 16:10:41,954 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:10:41,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:10:41,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:10:41,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:10:41,957 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:10:41,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:10:41,958 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:10:41,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:10:41,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:10:41,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:10:41,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:10:41,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:10:41,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:10:41,960 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:10:41,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:10:41,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:10:41,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:10:41,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:10:41,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:10:41,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:10:41,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:10:41,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:41,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:10:41,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:10:41,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:10:41,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:10:41,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:10:41,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:10:41,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:10:41,963 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:10:42,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:10:42,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:10:42,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:10:42,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:10:42,451 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:10:42,453 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-24 16:10:42,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ad564e4b/f4a0109013af402580d90959dabde84f/FLAGc04cadc5b [2020-09-24 16:10:43,104 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:10:43,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-24 16:10:43,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ad564e4b/f4a0109013af402580d90959dabde84f/FLAGc04cadc5b [2020-09-24 16:10:43,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ad564e4b/f4a0109013af402580d90959dabde84f [2020-09-24 16:10:43,453 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:10:43,460 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:10:43,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:43,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:10:43,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:10:43,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:43" (1/1) ... [2020-09-24 16:10:43,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c489c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43, skipping insertion in model container [2020-09-24 16:10:43,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:43" (1/1) ... [2020-09-24 16:10:43,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:10:43,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:10:43,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:43,719 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:10:43,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:43,749 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:10:43,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43 WrapperNode [2020-09-24 16:10:43,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:43,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:10:43,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:10:43,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:10:43,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43" (1/1) ... [2020-09-24 16:10:43,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43" (1/1) ... [2020-09-24 16:10:43,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43" (1/1) ... [2020-09-24 16:10:43,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43" (1/1) ... [2020-09-24 16:10:43,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43" (1/1) ... [2020-09-24 16:10:43,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43" (1/1) ... [2020-09-24 16:10:43,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43" (1/1) ... [2020-09-24 16:10:43,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:10:43,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:10:43,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:10:43,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:10:43,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43" (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 16:10:43,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:10:43,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:10:43,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:10:43,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:10:43,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:10:43,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:10:43,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:10:43,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:10:43,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:10:44,142 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:10:44,142 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 16:10:44,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:44 BoogieIcfgContainer [2020-09-24 16:10:44,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:10:44,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:10:44,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:10:44,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:10:44,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:10:43" (1/3) ... [2020-09-24 16:10:44,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e98ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:44, skipping insertion in model container [2020-09-24 16:10:44,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:43" (2/3) ... [2020-09-24 16:10:44,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e98ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:44, skipping insertion in model container [2020-09-24 16:10:44,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:44" (3/3) ... [2020-09-24 16:10:44,186 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-09-24 16:10:44,225 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:10:44,246 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:10:44,270 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:10:44,304 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:10:44,304 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:10:44,304 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:10:44,305 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:10:44,305 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:10:44,305 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:10:44,305 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:10:44,305 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:10:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-24 16:10:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 16:10:44,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:44,334 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-24 16:10:44,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462595049] [2020-09-24 16:10:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,464 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,464 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,465 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,465 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 16:10:44,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 16:10:44,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 16:10:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,499 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,499 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,499 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,500 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:44,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:44,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,508 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 16:10:44,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462595049] [2020-09-24 16:10:44,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:44,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 16:10:44,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672096115] [2020-09-24 16:10:44,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 16:10:44,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 16:10:44,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 16:10:44,539 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-24 16:10:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:44,564 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-24 16:10:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 16:10:44,566 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-24 16:10:44,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:44,577 INFO L225 Difference]: With dead ends: 33 [2020-09-24 16:10:44,577 INFO L226 Difference]: Without dead ends: 16 [2020-09-24 16:10:44,582 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 16:10:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-24 16:10:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-24 16:10:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-24 16:10:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-24 16:10:44,626 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-24 16:10:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:44,627 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-24 16:10:44,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 16:10:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-24 16:10:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 16:10:44,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:44,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:10:44,629 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,629 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-24 16:10:44,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015845881] [2020-09-24 16:10:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,671 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,671 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,671 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,672 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 16:10:44,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 16:10:44,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:44,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:44,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 16:10:44,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:44,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,769 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,770 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,770 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,770 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:44,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:44,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:44,777 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 16:10:44,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015845881] [2020-09-24 16:10:44,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:44,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 16:10:44,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634485944] [2020-09-24 16:10:44,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 16:10:44,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 16:10:44,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:44,781 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-09-24 16:10:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:44,808 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-24 16:10:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 16:10:44,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-24 16:10:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:44,810 INFO L225 Difference]: With dead ends: 24 [2020-09-24 16:10:44,810 INFO L226 Difference]: Without dead ends: 19 [2020-09-24 16:10:44,811 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 16:10:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-24 16:10:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-09-24 16:10:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-24 16:10:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-24 16:10:44,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-24 16:10:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:44,817 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-24 16:10:44,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 16:10:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-24 16:10:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 16:10:44,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:44,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:10:44,819 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-24 16:10:44,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725605705] [2020-09-24 16:10:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,877 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,878 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,878 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,878 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:10:44,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 16:10:44,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 16:10:44,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:10:44,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 16:10:44,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,998 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,999 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,999 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,999 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:45,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:45,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:45,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:45,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:45,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:45,007 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 16:10:45,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725605705] [2020-09-24 16:10:45,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:45,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 16:10:45,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815730997] [2020-09-24 16:10:45,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:10:45,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:45,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:10:45,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:45,010 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-09-24 16:10:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:45,073 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-24 16:10:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:10:45,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-24 16:10:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:45,076 INFO L225 Difference]: With dead ends: 31 [2020-09-24 16:10:45,076 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 16:10:45,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 16:10:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-09-24 16:10:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 16:10:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-24 16:10:45,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-24 16:10:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:45,091 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-24 16:10:45,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:10:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-24 16:10:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 16:10:45,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:45,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:45,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:10:45,094 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:45,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:45,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-24 16:10:45,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:45,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196920179] [2020-09-24 16:10:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,158 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,159 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,159 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,159 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 16:10:45,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 16:10:45,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:45,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:10:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 16:10:45,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,273 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,273 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:45,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:45,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196920179] [2020-09-24 16:10:45,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:45,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:10:45,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099113869] [2020-09-24 16:10:45,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:10:45,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:45,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:10:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:45,284 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-24 16:10:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:45,334 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-24 16:10:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 16:10:45,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-24 16:10:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:45,336 INFO L225 Difference]: With dead ends: 36 [2020-09-24 16:10:45,336 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 16:10:45,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 16:10:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-24 16:10:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 16:10:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 16:10:45,345 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-24 16:10:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:45,346 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 16:10:45,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:10:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 16:10:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 16:10:45,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:45,347 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:45,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:10:45,348 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-24 16:10:45,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:45,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112967583] [2020-09-24 16:10:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,445 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,446 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,446 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,446 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 16:10:45,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-24 16:10:45,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:45,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:45,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 16:10:45,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,626 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,626 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,627 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,627 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:45,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:45,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:45,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:45,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:45,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:45,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112967583] [2020-09-24 16:10:45,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:45,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:10:45,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858505326] [2020-09-24 16:10:45,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:10:45,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:10:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:10:45,635 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2020-09-24 16:10:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:45,823 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-24 16:10:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:10:45,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-24 16:10:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:45,825 INFO L225 Difference]: With dead ends: 39 [2020-09-24 16:10:45,825 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 16:10:45,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:10:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 16:10:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-24 16:10:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 16:10:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 16:10:45,834 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-24 16:10:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:45,834 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 16:10:45,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:10:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 16:10:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 16:10:45,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:45,836 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:45,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:10:45,836 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-24 16:10:45,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:45,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757257861] [2020-09-24 16:10:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,910 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,911 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,912 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,912 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:10:45,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 16:10:45,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:10:45,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:45,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 16:10:45,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:46,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:46,171 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:46,172 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:46,172 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:46,172 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:46,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:46,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:46,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:46,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:46,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:46,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:46,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757257861] [2020-09-24 16:10:46,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:46,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:10:46,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683635144] [2020-09-24 16:10:46,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:10:46,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:46,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:10:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:10:46,182 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-09-24 16:10:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:46,437 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-09-24 16:10:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:10:46,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-09-24 16:10:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:46,439 INFO L225 Difference]: With dead ends: 44 [2020-09-24 16:10:46,439 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 16:10:46,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:10:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 16:10:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-24 16:10:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 16:10:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-24 16:10:46,447 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-24 16:10:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:46,448 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-24 16:10:46,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:10:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-24 16:10:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 16:10:46,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:46,449 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:46,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:10:46,450 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:46,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-24 16:10:46,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:46,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568891351] [2020-09-24 16:10:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:46,576 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:46,576 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:46,576 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:46,577 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:46,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 16:10:46,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:46,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-24 16:10:46,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:46,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:10:46,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:46,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 16:10:46,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:46,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:46,830 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:46,830 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:46,831 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:46,831 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:46,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:46,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:46,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:46,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:46,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:46,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:46,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568891351] [2020-09-24 16:10:46,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:46,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:10:46,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802548996] [2020-09-24 16:10:46,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:10:46,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:46,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:10:46,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:10:46,850 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 13 states. [2020-09-24 16:10:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:47,193 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-09-24 16:10:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 16:10:47,194 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-24 16:10:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:47,195 INFO L225 Difference]: With dead ends: 49 [2020-09-24 16:10:47,195 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 16:10:47,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:10:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 16:10:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 16:10:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 16:10:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 16:10:47,202 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-24 16:10:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:47,203 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 16:10:47,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:10:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 16:10:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 16:10:47,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:47,205 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:47,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:10:47,205 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:47,206 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-24 16:10:47,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:47,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013667813] [2020-09-24 16:10:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 16:10:47,222 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 16:10:47,223 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 16:10:47,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:10:47,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:10:47 BoogieIcfgContainer [2020-09-24 16:10:47,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 16:10:47,254 INFO L168 Benchmark]: Toolchain (without parser) took 3797.24 ms. Allocated memory was 140.0 MB in the beginning and 245.4 MB in the end (delta: 105.4 MB). Free memory was 102.2 MB in the beginning and 173.4 MB in the end (delta: -71.2 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:47,255 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 16:10:47,256 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.48 ms. Allocated memory is still 140.0 MB. Free memory was 101.6 MB in the beginning and 92.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:47,257 INFO L168 Benchmark]: Boogie Preprocessor took 113.74 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 181.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:47,258 INFO L168 Benchmark]: RCFGBuilder took 290.99 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:47,259 INFO L168 Benchmark]: TraceAbstraction took 3092.45 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 169.3 MB in the beginning and 173.4 MB in the end (delta: -4.2 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:47,263 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.48 ms. Allocated memory is still 140.0 MB. Free memory was 101.6 MB in the beginning and 92.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.74 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 181.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 290.99 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3092.45 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 169.3 MB in the beginning and 173.4 MB in the end (delta: -4.2 MB). Peak memory consumption was 38.8 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: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L19] CALL __VERIFIER_assert(y != 64) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 60 SDslu, 486 SDs, 0 SdLazy, 396 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, 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, 7 MinimizatonAttempts, 16 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 18925 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/115 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...