/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:08:05,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:08:05,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:08:05,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:08:05,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:08:05,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:08:05,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:08:05,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:08:05,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:08:05,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:08:05,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:08:05,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:08:05,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:08:05,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:08:05,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:08:05,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:08:05,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:08:05,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:08:05,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:08:05,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:08:05,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:08:05,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:08:05,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:08:05,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:08:05,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:08:05,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:08:05,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:08:05,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:08:05,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:08:05,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:08:05,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:08:05,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:08:05,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:08:05,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:08:05,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:08:05,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:08:05,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:08:05,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:08:05,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:08:05,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:08:05,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:08:05,883 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 [2020-10-13 11:08:05,926 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:08:05,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:08:05,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:08:05,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:08:05,930 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:08:05,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:08:05,931 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:08:05,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:08:05,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:08:05,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:08:05,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:08:05,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:08:05,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:08:05,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:08:05,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:08:05,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:08:05,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:08:05,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:08:05,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:08:05,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:08:05,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:08:05,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:08:05,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:08:05,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:08:05,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:08:05,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:08:05,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:08:05,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:08:05,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:08:05,936 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:08:06,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:08:06,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:08:06,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:08:06,228 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:08:06,228 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:08:06,229 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2020-10-13 11:08:06,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea03e688f/3066279e91b94b7d90d0d265a082258b/FLAG4ad76088e [2020-10-13 11:08:06,697 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:08:06,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/linear_search.c [2020-10-13 11:08:06,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea03e688f/3066279e91b94b7d90d0d265a082258b/FLAG4ad76088e [2020-10-13 11:08:07,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea03e688f/3066279e91b94b7d90d0d265a082258b [2020-10-13 11:08:07,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:08:07,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:08:07,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:08:07,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:08:07,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:08:07,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:08:07" (1/1) ... [2020-10-13 11:08:07,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc58bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07, skipping insertion in model container [2020-10-13 11:08:07,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:08:07" (1/1) ... [2020-10-13 11:08:07,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:08:07,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:08:07,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:08:07,327 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:08:07,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:08:07,362 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:08:07,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07 WrapperNode [2020-10-13 11:08:07,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:08:07,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:08:07,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:08:07,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:08:07,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07" (1/1) ... [2020-10-13 11:08:07,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07" (1/1) ... [2020-10-13 11:08:07,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07" (1/1) ... [2020-10-13 11:08:07,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07" (1/1) ... [2020-10-13 11:08:07,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07" (1/1) ... [2020-10-13 11:08:07,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07" (1/1) ... [2020-10-13 11:08:07,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07" (1/1) ... [2020-10-13 11:08:07,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:08:07,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:08:07,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:08:07,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:08:07,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07" (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 [2020-10-13 11:08:07,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:08:07,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:08:07,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:08:07,597 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2020-10-13 11:08:07,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:08:07,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:08:07,597 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 11:08:07,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:08:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-13 11:08:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2020-10-13 11:08:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 11:08:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:08:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 11:08:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 11:08:07,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:08:07,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:08:07,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 11:08:07,938 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:08:07,939 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 11:08:07,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:08:07 BoogieIcfgContainer [2020-10-13 11:08:07,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:08:07,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:08:07,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:08:07,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:08:07,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:08:07" (1/3) ... [2020-10-13 11:08:07,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39db3936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:08:07, skipping insertion in model container [2020-10-13 11:08:07,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:08:07" (2/3) ... [2020-10-13 11:08:07,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39db3936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:08:07, skipping insertion in model container [2020-10-13 11:08:07,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:08:07" (3/3) ... [2020-10-13 11:08:07,966 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2020-10-13 11:08:07,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:08:07,996 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:08:08,014 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:08:08,038 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:08:08,038 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:08:08,038 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:08:08,038 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:08:08,039 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:08:08,039 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:08:08,039 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:08:08,039 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:08:08,057 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 11:08:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 11:08:08,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:08,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:08,064 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash 868129876, now seen corresponding path program 1 times [2020-10-13 11:08:08,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:08,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103210395] [2020-10-13 11:08:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:08,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:08,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:08,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:08,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:08,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:08:08,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-13 11:08:08,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:08,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:08,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 11:08:08,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:08,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 11:08:08,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:08,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:08,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:08,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:08,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:08,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:08:08,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:08,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:08,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:08,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:08,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:08,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:08,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:08,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:08,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 11:08:08,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:08,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 11:08:08,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:08,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:08,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:08:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:08,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:08,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103210395] [2020-10-13 11:08:08,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:08:08,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:08:08,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914387652] [2020-10-13 11:08:08,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:08:08,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:08,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:08:08,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:08:08,966 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-13 11:08:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:09,067 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-13 11:08:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:08:09,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-13 11:08:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:09,078 INFO L225 Difference]: With dead ends: 45 [2020-10-13 11:08:09,078 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 11:08:09,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:08:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 11:08:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 11:08:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 11:08:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 11:08:09,130 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-13 11:08:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:09,131 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 11:08:09,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:08:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 11:08:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 11:08:09,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:09,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:09,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:08:09,136 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash -202652409, now seen corresponding path program 1 times [2020-10-13 11:08:09,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:09,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620059141] [2020-10-13 11:08:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:08:09,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:09,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-13 11:08:09,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:09,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 11:08:09,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:08:09,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:09,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:09,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:09,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:08:09,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:09,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 11:08:09,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 11:08:09,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:09,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-13 11:08:09,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:08:09,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:09,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:08:09,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:09,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620059141] [2020-10-13 11:08:09,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:08:09,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 11:08:09,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758151904] [2020-10-13 11:08:09,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:08:09,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:09,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:08:09,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:08:09,742 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-13 11:08:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:09,944 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-13 11:08:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:08:09,944 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 11:08:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:09,945 INFO L225 Difference]: With dead ends: 30 [2020-10-13 11:08:09,946 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 11:08:09,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:08:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 11:08:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 11:08:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 11:08:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 11:08:09,953 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2020-10-13 11:08:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:09,953 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 11:08:09,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:08:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 11:08:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 11:08:09,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:09,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:09,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:08:09,955 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:09,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1540157926, now seen corresponding path program 1 times [2020-10-13 11:08:09,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:09,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447032599] [2020-10-13 11:08:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:10,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:08:10,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:10,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-13 11:08:10,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:10,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:10,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 11:08:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 11:08:10,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:10,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:10,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:10,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:10,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:10,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:10,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:10,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:10,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:10,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:10,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 11:08:10,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:10,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-13 11:08:10,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:10,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:08:10,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:10,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447032599] [2020-10-13 11:08:10,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:08:10,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 11:08:10,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756958730] [2020-10-13 11:08:10,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:08:10,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:10,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:08:10,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:08:10,618 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2020-10-13 11:08:10,966 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-13 11:08:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:11,048 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-13 11:08:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:08:11,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 11:08:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:11,052 INFO L225 Difference]: With dead ends: 38 [2020-10-13 11:08:11,052 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 11:08:11,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:08:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 11:08:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-13 11:08:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 11:08:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 11:08:11,076 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-13 11:08:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:11,077 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 11:08:11,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:08:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 11:08:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 11:08:11,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:11,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:11,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:08:11,078 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1147130916, now seen corresponding path program 1 times [2020-10-13 11:08:11,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:11,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804267492] [2020-10-13 11:08:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:11,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:11,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:08:11,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:08:11,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-13 11:08:11,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:08:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 11:08:11,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:11,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:11,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:11,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:11,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:11,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:11,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:11,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:11,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:11,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:11,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:11,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:11,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:11,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 11:08:11,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:11,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-13 11:08:11,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:08:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:08:11,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:11,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804267492] [2020-10-13 11:08:11,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:08:11,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 11:08:11,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582550371] [2020-10-13 11:08:11,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:08:11,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:11,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:08:11,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:08:11,751 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-10-13 11:08:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:11,902 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-13 11:08:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:08:11,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 11:08:11,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:11,904 INFO L225 Difference]: With dead ends: 35 [2020-10-13 11:08:11,904 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 11:08:11,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:08:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 11:08:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 11:08:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 11:08:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 11:08:11,910 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-13 11:08:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:11,911 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 11:08:11,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:08:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 11:08:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 11:08:11,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:11,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:11,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:08:11,913 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1697189824, now seen corresponding path program 1 times [2020-10-13 11:08:11,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:11,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840540954] [2020-10-13 11:08:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:11,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:12,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 11:08:12,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:12,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-13 11:08:12,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:12,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:08:12,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 11:08:12,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 11:08:12,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:12,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:12,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:12,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:12,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:12,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:12,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:12,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:12,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:12,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:12,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:12,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:12,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:08:12,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:12,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-13 11:08:12,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:12,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:08:12,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:08:12,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 11:08:12,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:12,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840540954] [2020-10-13 11:08:12,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:08:12,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:08:12,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718852941] [2020-10-13 11:08:12,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:08:12,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:12,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:08:12,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:08:12,727 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-13 11:08:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:12,854 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-13 11:08:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:08:12,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 11:08:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:12,856 INFO L225 Difference]: With dead ends: 46 [2020-10-13 11:08:12,856 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 11:08:12,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:08:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 11:08:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-13 11:08:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 11:08:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 11:08:12,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2020-10-13 11:08:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:12,868 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 11:08:12,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:08:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 11:08:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 11:08:12,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:12,869 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:12,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:08:12,870 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:12,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2090216834, now seen corresponding path program 1 times [2020-10-13 11:08:12,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:12,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367359386] [2020-10-13 11:08:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:12,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:12,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 11:08:12,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:12,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-13 11:08:12,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:08:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 11:08:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:08:13,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:13,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:13,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:13,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:13,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:13,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:13,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:13,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:13,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:13,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:13,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:13,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:08:13,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:13,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 11:08:13,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:13,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:08:13,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:08:13,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:13,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367359386] [2020-10-13 11:08:13,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:08:13,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:08:13,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123019565] [2020-10-13 11:08:13,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:08:13,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:13,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:08:13,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:08:13,120 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-10-13 11:08:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:13,226 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-13 11:08:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:08:13,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 11:08:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:13,227 INFO L225 Difference]: With dead ends: 48 [2020-10-13 11:08:13,227 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 11:08:13,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:08:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 11:08:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-13 11:08:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 11:08:13,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 11:08:13,234 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-13 11:08:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:13,234 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 11:08:13,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:08:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 11:08:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 11:08:13,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:13,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:13,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:08:13,236 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:13,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:13,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1439024386, now seen corresponding path program 1 times [2020-10-13 11:08:13,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:13,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986475027] [2020-10-13 11:08:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:13,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:13,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:13,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 11:08:13,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:08:13,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-13 11:08:13,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 11:08:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:08:13,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:13,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:13,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:13,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:13,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:13,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:13,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:13,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:13,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:13,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:13,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:13,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:13,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:08:13,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:13,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-13 11:08:13,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:08:13,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 11:08:13,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986475027] [2020-10-13 11:08:13,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:13,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:08:13,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798566541] [2020-10-13 11:08:13,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:08:13,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:13,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:08:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:08:13,884 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-13 11:08:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:14,105 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-10-13 11:08:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:08:14,105 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-13 11:08:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:14,106 INFO L225 Difference]: With dead ends: 38 [2020-10-13 11:08:14,106 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 11:08:14,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:08:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 11:08:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 11:08:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 11:08:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-13 11:08:14,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2020-10-13 11:08:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:14,113 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-13 11:08:14,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:08:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-13 11:08:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 11:08:14,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:14,114 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:14,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:08:14,114 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1832051396, now seen corresponding path program 1 times [2020-10-13 11:08:14,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:14,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998893831] [2020-10-13 11:08:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:14,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:14,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:14,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:14,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:14,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 11:08:14,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:14,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-13 11:08:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:08:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:08:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:08:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:14,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:14,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:14,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:14,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:14,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:14,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:14,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:14,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:14,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:14,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:14,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:14,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:14,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:14,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:14,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:08:14,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:14,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-13 11:08:14,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:14,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:08:14,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:14,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:08:14,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:14,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998893831] [2020-10-13 11:08:14,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:14,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:08:14,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536211495] [2020-10-13 11:08:14,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:08:14,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:14,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:08:14,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:08:14,905 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-10-13 11:08:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:15,084 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-10-13 11:08:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:08:15,085 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-13 11:08:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:15,086 INFO L225 Difference]: With dead ends: 42 [2020-10-13 11:08:15,086 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 11:08:15,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:08:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 11:08:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 11:08:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 11:08:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 11:08:15,092 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 24 [2020-10-13 11:08:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:15,092 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 11:08:15,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:08:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 11:08:15,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 11:08:15,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:15,094 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:15,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:08:15,094 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:15,094 INFO L82 PathProgramCache]: Analyzing trace with hash -648228970, now seen corresponding path program 1 times [2020-10-13 11:08:15,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:15,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684305200] [2020-10-13 11:08:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:15,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:15,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 11:08:15,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:15,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-13 11:08:15,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:08:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 11:08:15,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:08:15,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:15,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:15,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:15,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:15,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:15,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:15,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:15,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:15,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:15,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:15,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:15,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:15,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:15,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:08:15,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:15,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-13 11:08:15,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:08:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:15,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:08:15,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:15,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684305200] [2020-10-13 11:08:15,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:15,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:08:15,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449359395] [2020-10-13 11:08:15,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:08:15,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:08:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:08:15,391 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 6 states. [2020-10-13 11:08:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:15,561 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-13 11:08:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:08:15,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-13 11:08:15,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:15,563 INFO L225 Difference]: With dead ends: 52 [2020-10-13 11:08:15,563 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 11:08:15,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:08:15,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 11:08:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-10-13 11:08:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 11:08:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-13 11:08:15,570 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2020-10-13 11:08:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:15,570 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-13 11:08:15,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:08:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-13 11:08:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 11:08:15,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:15,571 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:15,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:08:15,572 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:15,572 INFO L82 PathProgramCache]: Analyzing trace with hash -390063532, now seen corresponding path program 2 times [2020-10-13 11:08:15,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:15,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856188498] [2020-10-13 11:08:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:15,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:17,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 11:08:17,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:17,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1594 [2020-10-13 11:08:17,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:17,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:08:17,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:08:17,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:08:17,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:17,491 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 30 [2020-10-13 11:08:17,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:17,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:17,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:17,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:17,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:08:17,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:17,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:17,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:17,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:18,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:18,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:08:18,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:18,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-13 11:08:18,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:08:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:08:18,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:18,393 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2020-10-13 11:08:18,609 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-13 11:08:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:18,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856188498] [2020-10-13 11:08:18,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:18,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:08:18,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183550111] [2020-10-13 11:08:18,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:08:18,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:18,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:08:18,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:08:18,855 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 10 states. [2020-10-13 11:08:19,665 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-13 11:08:19,980 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 11:08:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:20,134 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-13 11:08:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:08:20,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-13 11:08:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:20,136 INFO L225 Difference]: With dead ends: 46 [2020-10-13 11:08:20,136 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 11:08:20,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:08:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 11:08:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 11:08:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 11:08:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-13 11:08:20,146 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2020-10-13 11:08:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:20,146 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-13 11:08:20,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:08:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-13 11:08:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 11:08:20,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:20,149 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:20,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:08:20,149 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:20,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:20,150 INFO L82 PathProgramCache]: Analyzing trace with hash -723812178, now seen corresponding path program 2 times [2020-10-13 11:08:20,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:20,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303563797] [2020-10-13 11:08:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:20,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:20,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:20,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 11:08:20,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:20,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-13 11:08:20,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:20,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 11:08:20,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:08:20,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:20,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:20,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:20,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:20,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:20,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:08:20,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:20,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:20,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:20,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:20,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:20,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:20,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:20,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:08:20,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:20,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-13 11:08:20,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:20,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:20,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:20,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:08:20,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:20,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303563797] [2020-10-13 11:08:20,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:20,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:08:20,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956791541] [2020-10-13 11:08:20,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:08:20,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:20,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:08:20,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:08:20,541 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 7 states. [2020-10-13 11:08:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:20,717 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-13 11:08:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:08:20,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 11:08:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:20,718 INFO L225 Difference]: With dead ends: 56 [2020-10-13 11:08:20,718 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 11:08:20,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:08:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 11:08:20,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2020-10-13 11:08:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 11:08:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-13 11:08:20,732 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-10-13 11:08:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:20,734 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-13 11:08:20,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:08:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-13 11:08:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 11:08:20,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:20,735 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:20,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:08:20,735 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash -465646740, now seen corresponding path program 3 times [2020-10-13 11:08:20,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:20,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164114857] [2020-10-13 11:08:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:20,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:21,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:22,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:22,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 11:08:22,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:22,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1558 [2020-10-13 11:08:22,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:08:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:08:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:08:22,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:22,858 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 29 [2020-10-13 11:08:22,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:22,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:22,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:22,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:22,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:08:22,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:22,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:22,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:23,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:23,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:23,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:23,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:08:23,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:23,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-13 11:08:23,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:08:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:08:23,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:23,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164114857] [2020-10-13 11:08:23,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:23,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:08:23,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912171391] [2020-10-13 11:08:23,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:08:23,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:23,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:08:23,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:08:23,816 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 10 states. [2020-10-13 11:08:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:24,268 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-10-13 11:08:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:08:24,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-13 11:08:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:24,270 INFO L225 Difference]: With dead ends: 50 [2020-10-13 11:08:24,270 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 11:08:24,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:08:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 11:08:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 11:08:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 11:08:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-13 11:08:24,284 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2020-10-13 11:08:24,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:24,284 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-13 11:08:24,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:08:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-13 11:08:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 11:08:24,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:24,288 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:24,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:08:24,289 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1595152954, now seen corresponding path program 3 times [2020-10-13 11:08:24,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:24,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083622368] [2020-10-13 11:08:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:24,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:24,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 11:08:24,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:24,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-13 11:08:24,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:24,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:08:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 11:08:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:08:24,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:24,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:24,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:24,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:24,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:24,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:08:24,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:24,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:24,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:24,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:24,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:24,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:24,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:24,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-13 11:08:24,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:08:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:08:24,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:24,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083622368] [2020-10-13 11:08:24,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:24,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:08:24,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538995088] [2020-10-13 11:08:24,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:08:24,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:24,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:08:24,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:08:24,810 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 8 states. [2020-10-13 11:08:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:25,041 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-13 11:08:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:08:25,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-13 11:08:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:25,043 INFO L225 Difference]: With dead ends: 60 [2020-10-13 11:08:25,043 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 11:08:25,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:08:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 11:08:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-10-13 11:08:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 11:08:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-13 11:08:25,059 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2020-10-13 11:08:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:25,060 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-13 11:08:25,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:08:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-13 11:08:25,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 11:08:25,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:25,064 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:25,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:08:25,066 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:25,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1336987516, now seen corresponding path program 4 times [2020-10-13 11:08:25,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:25,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322304896] [2020-10-13 11:08:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:25,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:25,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:25,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:25,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:26,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:26,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:29,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:29,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 11:08:29,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:08:29,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4542 [2020-10-13 11:08:29,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:29,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:08:29,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:08:29,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:08:29,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:29,897 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 28 [2020-10-13 11:08:29,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:29,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:29,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:29,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:29,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:29,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:08:29,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:29,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:29,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:29,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:29,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:29,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:32,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:32,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:08:32,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:08:32,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2414 [2020-10-13 11:08:32,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:32,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:08:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:08:32,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:33,138 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-10-13 11:08:33,480 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 94 [2020-10-13 11:08:33,777 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-10-13 11:08:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:34,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322304896] [2020-10-13 11:08:34,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:34,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:08:34,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035524739] [2020-10-13 11:08:34,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:08:34,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:08:34,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:08:34,007 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 14 states. [2020-10-13 11:08:34,901 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 83 [2020-10-13 11:08:35,379 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 79 [2020-10-13 11:08:35,866 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 11:08:40,926 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 174 DAG size of output: 145 [2020-10-13 11:08:41,397 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 75 [2020-10-13 11:08:41,684 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 11:08:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:41,791 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-13 11:08:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:08:41,791 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-13 11:08:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:41,793 INFO L225 Difference]: With dead ends: 54 [2020-10-13 11:08:41,793 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 11:08:41,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:08:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 11:08:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 11:08:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 11:08:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 11:08:41,801 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 36 [2020-10-13 11:08:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:41,801 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 11:08:41,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:08:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 11:08:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:08:41,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:41,803 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:41,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:08:41,803 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1972633310, now seen corresponding path program 4 times [2020-10-13 11:08:41,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:41,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788844976] [2020-10-13 11:08:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:41,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:42,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:42,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:08:42,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:42,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-13 11:08:42,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:08:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 11:08:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:08:42,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:42,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:42,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:42,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:42,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:42,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:42,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:08:42,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:42,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:42,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:42,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:42,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:42,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:42,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:42,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:42,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 11:08:42,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:42,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-13 11:08:42,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:42,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:08:42,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:42,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:08:42,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:42,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788844976] [2020-10-13 11:08:42,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:42,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:08:42,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722180343] [2020-10-13 11:08:42,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:08:42,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:08:42,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:08:42,593 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 9 states. [2020-10-13 11:08:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:43,049 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-13 11:08:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:08:43,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-13 11:08:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:43,051 INFO L225 Difference]: With dead ends: 64 [2020-10-13 11:08:43,051 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 11:08:43,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:08:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 11:08:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-10-13 11:08:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 11:08:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 11:08:43,059 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2020-10-13 11:08:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:43,059 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 11:08:43,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:08:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 11:08:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:08:43,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:43,061 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:43,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 11:08:43,061 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:43,061 INFO L82 PathProgramCache]: Analyzing trace with hash -2064168548, now seen corresponding path program 5 times [2020-10-13 11:08:43,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:43,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683485289] [2020-10-13 11:08:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:43,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:43,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:43,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:43,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:44,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:44,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:48,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:48,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:08:48,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:08:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:08:48,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:08:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:08:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 11:08:48,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:48,420 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 28 [2020-10-13 11:08:48,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:48,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:48,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:48,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:48,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:48,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:48,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:48,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:48,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:48,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:48,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:48,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:49,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:49,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:49,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:49,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:49,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:49,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:52,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:52,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 11:08:52,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:08:52,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4256 [2020-10-13 11:08:52,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:52,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:08:52,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 11:08:52,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:53,123 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2020-10-13 11:08:53,492 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2020-10-13 11:08:53,733 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 34 [2020-10-13 11:08:53,959 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 34 [2020-10-13 11:08:54,568 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-13 11:08:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:54,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683485289] [2020-10-13 11:08:54,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:54,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:08:54,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942656309] [2020-10-13 11:08:54,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:08:54,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:54,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:08:54,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:08:54,692 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 13 states. [2020-10-13 11:08:55,236 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-13 11:08:55,634 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-13 11:08:55,920 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-13 11:08:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:56,044 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-13 11:08:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:08:56,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-13 11:08:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:56,045 INFO L225 Difference]: With dead ends: 58 [2020-10-13 11:08:56,045 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 11:08:56,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:08:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 11:08:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 11:08:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 11:08:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-13 11:08:56,054 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 40 [2020-10-13 11:08:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:56,054 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-13 11:08:56,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:08:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-13 11:08:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 11:08:56,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:56,055 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:56,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:08:56,055 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:56,056 INFO L82 PathProgramCache]: Analyzing trace with hash 400149494, now seen corresponding path program 5 times [2020-10-13 11:08:56,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:56,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044882945] [2020-10-13 11:08:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:56,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:56,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:56,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:08:56,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:56,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-13 11:08:56,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:56,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:08:56,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 11:08:56,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:08:56,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:56,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:56,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:56,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:56,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:56,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:56,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:08:56,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:56,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:56,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:08:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:56,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:56,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:56,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 11:08:56,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:56,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-13 11:08:56,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:56,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:08:56,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:56,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:08:56,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:56,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044882945] [2020-10-13 11:08:56,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:56,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:08:56,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436613449] [2020-10-13 11:08:56,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:08:56,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:08:56,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:08:56,679 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 10 states. [2020-10-13 11:08:57,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:57,106 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-13 11:08:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:08:57,107 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-13 11:08:57,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:57,108 INFO L225 Difference]: With dead ends: 68 [2020-10-13 11:08:57,108 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 11:08:57,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:08:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 11:08:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-13 11:08:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 11:08:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-13 11:08:57,116 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2020-10-13 11:08:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:57,117 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-13 11:08:57,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:08:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-13 11:08:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 11:08:57,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:57,117 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:57,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:08:57,118 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:57,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:57,118 INFO L82 PathProgramCache]: Analyzing trace with hash 658314932, now seen corresponding path program 6 times [2020-10-13 11:08:57,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:57,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421532436] [2020-10-13 11:08:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:57,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:58,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:58,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:58,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:59,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:59,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:00,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:00,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:02,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:09:02,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 11:09:02,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:09:02,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:02,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:09:02,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:09:02,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 11:09:02,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:02,586 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 21 [2020-10-13 11:09:02,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:02,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:02,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:02,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:02,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:09:02,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:02,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:02,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:02,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:02,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:02,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:09:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:02,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:03,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:03,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:03,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:03,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:04,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:04,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:04,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:04,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:04,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:04,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:04,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:05,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:05,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:05,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:07,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:07,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 11:09:07,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:09:07,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:09:07,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:07,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:09:07,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:09:07,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 11:09:07,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:09:08,584 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-10-13 11:09:08,833 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-10-13 11:09:09,115 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-10-13 11:09:09,663 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 77 [2020-10-13 11:09:10,613 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 121 [2020-10-13 11:09:11,682 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 119 [2020-10-13 11:09:13,753 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse12 (div c_linear_search_~n 4294967296)) (.cse42 (div (+ c_linear_search_~j~0 (- 1)) 4294967296)) (.cse9 (select |c_#memory_int| |c_linear_search_#in~a.base|)) (.cse47 (* 2 c_linear_search_~j~0))) (let ((.cse1 (div (+ c_linear_search_~j~0 4294967290) 4294967296)) (.cse7 (+ .cse47 2)) (.cse3 (not (= (select .cse9 (+ |c_linear_search_#in~a.offset| 8)) |c_linear_search_#in~q|))) (.cse11 (* 8589934592 .cse42)) (.cse4 (* c_linear_search_~j~0 2)) (.cse5 (* .cse42 (- 8589934592))) (.cse0 (+ .cse12 1))) (and (or (< 0 .cse0) (and (<= (+ (* 4294967296 .cse1) 1) c_linear_search_~j~0) (or (let ((.cse2 (* 4 (div (+ .cse4 .cse5 9) 4)))) (and (or (< .cse2 12) .cse3) (<= .cse2 12))) (let ((.cse10 (div (+ .cse4 .cse5 5) 4))) (let ((.cse6 (* 4 .cse10))) (let ((.cse8 (+ .cse6 .cse11))) (and (<= .cse6 12) (<= .cse7 .cse8) (or (not (= |c_linear_search_#in~q| (select .cse9 (+ (* .cse10 4) |c_linear_search_#in~a.offset|)))) (< .cse7 .cse8)) (or (< .cse6 12) .cse3)))))))) (= |c_linear_search_#in~n| c_linear_search_~n) (or (and (<= (+ (* 4294967296 .cse12) 1) c_linear_search_~n) (let ((.cse48 (* 8589934592 .cse12)) (.cse43 (* .cse12 8589934592))) (or (let ((.cse46 (div (+ .cse4 .cse43 .cse5 5) 4))) (let ((.cse18 (* 4 .cse46))) (let ((.cse44 (+ .cse47 .cse48 2)) (.cse45 (+ .cse18 .cse11))) (let ((.cse16 (or (< .cse44 .cse45) (not (= (select .cse9 (+ |c_linear_search_#in~a.offset| (* .cse46 4))) |c_linear_search_#in~q|)))) (.cse17 (<= .cse44 .cse45)) (.cse15 (+ (* 17179869184 .cse42) (* 2 c_linear_search_~n) 2)) (.cse19 (* 17179869184 .cse12)) (.cse22 (* 4 (div (+ .cse4 .cse43 .cse5 9) 4))) (.cse23 (* .cse12 (- 8589934592))) (.cse24 (* .cse42 8589934592)) (.cse25 (* c_linear_search_~n 2))) (and (let ((.cse13 (not (= (select .cse9 (+ |c_linear_search_#in~a.offset| .cse23 .cse24 (* .cse1 (- 8589934592)) .cse25 (- 2))) |c_linear_search_#in~q|))) (.cse20 (* 17179869184 .cse1))) (or (let ((.cse14 (+ .cse18 .cse19 .cse20))) (and (or .cse13 (< .cse14 .cse15)) (<= .cse14 .cse15) .cse16 .cse17)) (let ((.cse21 (+ .cse19 .cse22 .cse20))) (and (or .cse13 (< .cse21 .cse15)) (<= .cse21 .cse15))))) (let ((.cse40 (* c_linear_search_~j~0 8))) (let ((.cse41 (div (+ .cse40 68719476695) 34359738368))) (let ((.cse27 (not (= (select .cse9 (+ |c_linear_search_#in~a.offset| .cse23 .cse24 .cse25 (* .cse41 (- 8589934592)) (- 2))) |c_linear_search_#in~q|))) (.cse28 (* 17179869184 .cse41))) (or (let ((.cse26 (+ .cse18 .cse19 .cse28))) (and (or (< .cse26 .cse15) .cse27) (<= .cse26 .cse15) .cse16 .cse17)) (let ((.cse29 (+ .cse19 .cse22 .cse28))) (and (or .cse27 (< .cse29 .cse15)) (<= .cse29 .cse15))) (let ((.cse34 (div (+ .cse40 34359738327) 34359738368))) (let ((.cse35 (* .cse34 (- 8589934592)))) (and (let ((.cse30 (not (= (select .cse9 (+ |c_linear_search_#in~a.offset| .cse35 .cse23 .cse24 .cse25 (- 2))) |c_linear_search_#in~q|))) (.cse32 (* 17179869184 .cse34))) (or (let ((.cse31 (+ .cse32 .cse18 .cse19))) (and .cse16 .cse17 (or .cse30 (< .cse31 .cse15)) (<= .cse31 .cse15))) (let ((.cse33 (+ .cse32 .cse19 .cse22))) (and (<= .cse33 .cse15) (or .cse30 (< .cse33 .cse15)))))) (or (let ((.cse38 (div (+ .cse4 .cse35 5) 4))) (let ((.cse37 (* 4 .cse38))) (let ((.cse36 (+ (* 8589934592 .cse34) .cse37))) (and (<= .cse7 .cse36) (<= .cse37 12) (or (< .cse37 12) .cse3) (or (not (= (select .cse9 (+ |c_linear_search_#in~a.offset| (* .cse38 4))) |c_linear_search_#in~q|)) (< .cse7 .cse36)))))) (let ((.cse39 (* 4 (div (+ .cse4 .cse35 9) 4)))) (and (or .cse3 (< .cse39 12)) (<= .cse39 12)))))))))))))))) (< 2147483647 c_linear_search_~n) (<= 4294967301 c_linear_search_~n) (and (<= (+ (* 4294967296 (div (+ c_linear_search_~j~0 (* .cse12 4294967296) 8589934586) 4294967296)) 1) c_linear_search_~j~0) (or (let ((.cse49 (* 4 (div (+ .cse4 .cse43 .cse5 8589934601) 4)))) (and (<= .cse49 12) (or .cse3 (< .cse49 12)))) (let ((.cse53 (div (+ .cse4 .cse43 .cse5 8589934597) 4))) (let ((.cse50 (* 4 .cse53))) (let ((.cse51 (+ .cse47 .cse48 8589934594)) (.cse52 (+ .cse11 .cse50))) (and (<= .cse50 12) (or (< .cse50 12) .cse3) (<= .cse51 .cse52) (or (not (= (select .cse9 (+ |c_linear_search_#in~a.offset| (* .cse53 4))) |c_linear_search_#in~q|)) (< .cse51 .cse52))))))))))) (<= .cse0 0))))) (not (= 3 |c_linear_search_#in~q|))) is different from true [2020-10-13 11:10:32,597 WARN L193 SmtUtils]: Spent 1.31 m on a formula simplification. DAG size of input: 224 DAG size of output: 136 [2020-10-13 11:10:35,227 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 167 DAG size of output: 93 [2020-10-13 11:10:37,883 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 166 DAG size of output: 92 [2020-10-13 11:10:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2020-10-13 11:10:37,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421532436] [2020-10-13 11:10:37,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:37,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:10:37,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323077887] [2020-10-13 11:10:37,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:10:37,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:37,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:10:37,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=208, Unknown=1, NotChecked=28, Total=272 [2020-10-13 11:10:37,956 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2020-10-13 11:10:38,983 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-13 11:10:39,176 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-13 11:10:39,819 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 114 [2020-10-13 11:10:40,488 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 112