/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/reducercommutativity/avg05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:26:48,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:26:48,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:26:48,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:26:48,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:26:48,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:26:48,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:26:48,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:26:48,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:26:48,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:26:48,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:26:48,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:26:48,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:26:48,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:26:48,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:26:48,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:26:48,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:26:48,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:26:48,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:26:48,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:26:48,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:26:48,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:26:48,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:26:48,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:26:48,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:26:48,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:26:48,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:26:48,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:26:48,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:26:48,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 17:26:48,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 17:26:48,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 17:26:48,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 17:26:48,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 17:26:48,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 17:26:48,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 17:26:48,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 17:26:48,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 17:26:48,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:26:48,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:26:48,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:26:48,752 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 [2020-10-28 17:26:48,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:26:48,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:26:48,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:26:48,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:26:48,814 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:26:48,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:26:48,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:26:48,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:26:48,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:26:48,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:26:48,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:26:48,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:26:48,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:26:48,816 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:26:48,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:26:48,818 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:26:48,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:26:48,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:26:48,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:26:48,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:26:48,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:26:48,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:26:48,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:26:48,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:26:48,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:26:48,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:26:48,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:26:48,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:26:48,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:26:48,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:26:49,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:26:49,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:26:49,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:26:49,264 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:26:49,265 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:26:49,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg05-1.i [2020-10-28 17:26:49,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/927a87f49/9ae5fba603c24901b6f353862a24168a/FLAG0328e4307 [2020-10-28 17:26:49,916 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:26:49,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/avg05-1.i [2020-10-28 17:26:49,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/927a87f49/9ae5fba603c24901b6f353862a24168a/FLAG0328e4307 [2020-10-28 17:26:50,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/927a87f49/9ae5fba603c24901b6f353862a24168a [2020-10-28 17:26:50,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:26:50,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:26:50,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:26:50,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:26:50,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:26:50,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:26:50" (1/1) ... [2020-10-28 17:26:50,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1502a49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50, skipping insertion in model container [2020-10-28 17:26:50,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:26:50" (1/1) ... [2020-10-28 17:26:50,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:26:50,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:26:50,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:26:50,659 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:26:50,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:26:50,700 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:26:50,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50 WrapperNode [2020-10-28 17:26:50,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:26:50,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:26:50,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:26:50,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:26:50,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50" (1/1) ... [2020-10-28 17:26:50,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50" (1/1) ... [2020-10-28 17:26:50,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50" (1/1) ... [2020-10-28 17:26:50,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50" (1/1) ... [2020-10-28 17:26:50,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50" (1/1) ... [2020-10-28 17:26:50,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50" (1/1) ... [2020-10-28 17:26:50,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50" (1/1) ... [2020-10-28 17:26:50,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:26:50,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:26:50,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:26:50,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:26:50,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50" (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 [2020-10-28 17:26:50,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:26:50,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:26:50,845 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:26:50,845 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2020-10-28 17:26:50,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:26:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:26:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:26:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 17:26:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 17:26:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:26:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:26:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 17:26:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2020-10-28 17:26:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:26:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:26:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:26:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:26:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:26:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:26:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:26:51,317 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:26:51,317 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 17:26:51,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:26:51 BoogieIcfgContainer [2020-10-28 17:26:51,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:26:51,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:26:51,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:26:51,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:26:51,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:26:50" (1/3) ... [2020-10-28 17:26:51,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0bc952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:26:51, skipping insertion in model container [2020-10-28 17:26:51,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:26:50" (2/3) ... [2020-10-28 17:26:51,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0bc952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:26:51, skipping insertion in model container [2020-10-28 17:26:51,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:26:51" (3/3) ... [2020-10-28 17:26:51,338 INFO L111 eAbstractionObserver]: Analyzing ICFG avg05-1.i [2020-10-28 17:26:51,354 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:26:51,360 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:26:51,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:26:51,415 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:26:51,415 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:26:51,415 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:26:51,415 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:26:51,415 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:26:51,415 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:26:51,416 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:26:51,416 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:26:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-28 17:26:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 17:26:51,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:26:51,441 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:26:51,442 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:26:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:26:51,448 INFO L82 PathProgramCache]: Analyzing trace with hash 585288593, now seen corresponding path program 1 times [2020-10-28 17:26:51,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:26:51,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126532728] [2020-10-28 17:26:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:26:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:51,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:51,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:51,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:51,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:52,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:53,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 17:26:53,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 17:26:53,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1863 [2020-10-28 17:26:53,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:53,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:26:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:53,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 17:26:53,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:26:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:53,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:53,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:26:53,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:26:53,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:26:53,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:53,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:26:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:53,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:26:53,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 17:26:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:53,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:53,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:26:53,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:26:53,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:26:53,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:53,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:53,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:53,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 17:26:53,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:53,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:26:53,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-28 17:26:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:53,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:53,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:26:53,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:26:53,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 17:26:53,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:53,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:53,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:26:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:53,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 17:26:53,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 17:26:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:53,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:53,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:26:53,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:26:53,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 17:26:53,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:53,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:53,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:53,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 17:26:53,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:53,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:26:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 17:26:53,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126532728] [2020-10-28 17:26:53,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:26:53,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-10-28 17:26:53,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110373171] [2020-10-28 17:26:53,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 17:26:53,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:26:53,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 17:26:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 17:26:53,715 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-28 17:26:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:26:53,844 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-28 17:26:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 17:26:53,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-28 17:26:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:26:53,855 INFO L225 Difference]: With dead ends: 60 [2020-10-28 17:26:53,855 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 17:26:53,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 17:26:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 17:26:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 17:26:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 17:26:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 17:26:53,908 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2020-10-28 17:26:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:26:53,908 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 17:26:53,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 17:26:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 17:26:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 17:26:53,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:26:53,911 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:26:53,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:26:53,911 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:26:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:26:53,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1339353745, now seen corresponding path program 1 times [2020-10-28 17:26:53,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:26:53,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70426687] [2020-10-28 17:26:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:26:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:53,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:53,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:54,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:54,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:56,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 17:26:56,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 17:26:56,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2308 [2020-10-28 17:26:56,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:56,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:56,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:26:56,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:26:56,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 17:26:56,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:26:56,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:26:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:56,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:56,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:26:56,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:26:56,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 17:26:56,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:56,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:56,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:56,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:26:56,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:56,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 17:26:56,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 17:26:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:56,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:56,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:26:56,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:26:56,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 17:26:56,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:56,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:56,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:26:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:56,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:26:56,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-28 17:26:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:56,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:56,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:26:56,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:26:56,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 17:26:56,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:56,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:26:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:56,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:26:56,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 17:26:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:56,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:56,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:26:56,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:26:56,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 17:26:56,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:56,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:56,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:56,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:26:56,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:56,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:26:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 17:26:56,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70426687] [2020-10-28 17:26:56,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:26:56,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:26:56,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347084637] [2020-10-28 17:26:56,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:26:56,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:26:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:26:56,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:26:56,419 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-10-28 17:26:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:26:56,557 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-28 17:26:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:26:56,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 17:26:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:26:56,558 INFO L225 Difference]: With dead ends: 50 [2020-10-28 17:26:56,558 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 17:26:56,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:26:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 17:26:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-28 17:26:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 17:26:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-28 17:26:56,569 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 34 [2020-10-28 17:26:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:26:56,569 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-28 17:26:56,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:26:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-28 17:26:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 17:26:56,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:26:56,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:26:56,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 17:26:56,571 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:26:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:26:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash 677080051, now seen corresponding path program 1 times [2020-10-28 17:26:56,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:26:56,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335475047] [2020-10-28 17:26:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:26:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:56,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:56,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:59,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 17:26:59,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 17:26:59,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2762 [2020-10-28 17:26:59,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:59,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:26:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:26:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 17:26:59,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:26:59,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:26:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:59,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:59,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:26:59,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:26:59,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:26:59,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:59,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:59,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:59,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:26:59,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:59,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:26:59,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 17:26:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:59,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:59,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:26:59,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:26:59,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 17:26:59,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:59,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:26:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:59,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:26:59,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 17:26:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:59,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:59,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:26:59,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:26:59,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 17:26:59,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:59,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:26:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:26:59,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 17:26:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:59,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:26:59,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:26:59,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:26:59,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 17:26:59,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:26:59,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:26:59,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:26:59,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:26:59,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:26:59,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:26:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 17:26:59,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335475047] [2020-10-28 17:26:59,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:26:59,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:26:59,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474083912] [2020-10-28 17:26:59,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:26:59,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:26:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:26:59,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:26:59,471 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-10-28 17:26:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:26:59,590 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-28 17:26:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:26:59,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-28 17:26:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:26:59,592 INFO L225 Difference]: With dead ends: 52 [2020-10-28 17:26:59,592 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 17:26:59,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:26:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 17:26:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-28 17:26:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 17:26:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-28 17:26:59,601 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 36 [2020-10-28 17:26:59,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:26:59,601 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-28 17:26:59,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:26:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-28 17:26:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 17:26:59,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:26:59,603 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:26:59,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 17:26:59,603 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:26:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:26:59,604 INFO L82 PathProgramCache]: Analyzing trace with hash -112780075, now seen corresponding path program 2 times [2020-10-28 17:26:59,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:26:59,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665559846] [2020-10-28 17:26:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:26:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:26:59,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:26:59,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:03,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 17:27:03,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 17:27:03,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3693 [2020-10-28 17:27:03,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:03,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:27:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 17:27:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 17:27:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:03,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:03,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:03,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:03,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:03,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:27:03,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:03,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:03,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:03,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:03,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:03,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 17:27:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:03,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:03,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:27:03,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:03,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 17:27:03,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:03,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:03,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:03,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:03,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:03,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-28 17:27:03,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 17:27:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:03,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:03,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:27:03,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:03,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:27:03,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:03,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:03,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:03,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:03,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:03,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:03,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 17:27:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:03,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:03,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:27:03,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:03,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:27:03,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:03,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:27:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:27:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 17:27:03,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:27:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 17:27:03,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665559846] [2020-10-28 17:27:03,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:27:03,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:27:03,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534606412] [2020-10-28 17:27:03,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:27:03,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:03,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:27:03,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:27:03,446 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-10-28 17:27:03,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:03,574 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-28 17:27:03,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:27:03,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-28 17:27:03,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:03,576 INFO L225 Difference]: With dead ends: 52 [2020-10-28 17:27:03,576 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 17:27:03,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:27:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 17:27:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 17:27:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 17:27:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-28 17:27:03,596 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 38 [2020-10-28 17:27:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:03,597 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-28 17:27:03,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:27:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-28 17:27:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 17:27:03,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:03,600 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:03,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 17:27:03,601 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1830262189, now seen corresponding path program 1 times [2020-10-28 17:27:03,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:03,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325247395] [2020-10-28 17:27:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:03,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:03,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:08,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:08,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 17:27:08,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:27:08,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 17:27:08,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:08,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:27:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 17:27:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 17:27:08,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:27:08,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:08,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:08,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:08,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:08,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:08,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 17:27:08,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:08,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:08,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:08,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:08,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:08,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 17:27:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:08,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:08,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:08,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:08,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 17:27:08,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:08,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 17:27:08,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:08,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:08,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:08,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:08,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:08,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 17:27:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:08,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:08,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 17:27:08,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:08,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 17:27:08,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:08,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:27:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:27:08,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 17:27:08,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:08,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 17:27:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:08,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:08,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:08,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:08,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 17:27:08,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:08,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 17:27:08,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:08,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:08,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:08,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 17:27:08,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:08,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 17:27:08,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325247395] [2020-10-28 17:27:08,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:08,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:27:08,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272663765] [2020-10-28 17:27:08,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:27:08,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:08,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:27:08,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:27:08,807 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-10-28 17:27:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:08,983 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2020-10-28 17:27:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:27:08,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-10-28 17:27:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:08,985 INFO L225 Difference]: With dead ends: 55 [2020-10-28 17:27:08,986 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 17:27:08,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:27:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 17:27:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-28 17:27:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 17:27:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-28 17:27:08,999 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 44 [2020-10-28 17:27:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:09,001 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-28 17:27:09,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:27:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-28 17:27:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 17:27:09,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:09,003 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:09,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 17:27:09,003 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:09,004 INFO L82 PathProgramCache]: Analyzing trace with hash 60514641, now seen corresponding path program 2 times [2020-10-28 17:27:09,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:09,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443588920] [2020-10-28 17:27:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:09,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:09,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:09,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:09,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:14,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 17:27:14,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:27:14,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 17:27:14,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:14,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:14,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:27:14,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 17:27:14,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 17:27:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:14,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:14,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:14,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:14,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:14,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:27:14,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:14,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:14,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:14,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 17:27:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:14,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:14,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 17:27:14,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:14,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 17:27:14,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:14,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:14,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:14,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:14,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:14,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:14,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 17:27:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:14,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:14,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 17:27:14,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:14,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 17:27:14,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:14,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:14,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:14,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:14,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:14,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:14,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 17:27:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:14,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:14,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 17:27:14,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:14,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 17:27:14,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:14,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:14,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:27:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:14,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-28 17:27:14,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443588920] [2020-10-28 17:27:14,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:27:14,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:27:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678495762] [2020-10-28 17:27:14,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:27:14,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:14,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:27:14,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:27:14,195 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2020-10-28 17:27:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:14,272 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-28 17:27:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:27:14,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 17:27:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:14,274 INFO L225 Difference]: With dead ends: 53 [2020-10-28 17:27:14,274 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 17:27:14,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:27:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 17:27:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-28 17:27:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 17:27:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-28 17:27:14,281 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2020-10-28 17:27:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:14,283 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-28 17:27:14,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:27:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-28 17:27:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 17:27:14,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:14,284 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:14,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 17:27:14,285 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash -557631793, now seen corresponding path program 1 times [2020-10-28 17:27:14,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:14,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020283732] [2020-10-28 17:27:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:14,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:15,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:19,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 17:27:19,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:27:19,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 17:27:19,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:19,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:27:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:27:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:27:19,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:19,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:19,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:19,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:19,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:19,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:27:19,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:19,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:19,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:19,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 17:27:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:19,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:19,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 17:27:19,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:19,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 17:27:19,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:19,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:19,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:19,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:27:19,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:19,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:19,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 17:27:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:19,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:19,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 17:27:19,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:19,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 17:27:19,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:19,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:19,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:19,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:27:19,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:19,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:19,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 17:27:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:19,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:19,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 17:27:19,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:19,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 17:27:19,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:19,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:19,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:27:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:19,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 17:27:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020283732] [2020-10-28 17:27:19,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:19,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:27:19,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255260984] [2020-10-28 17:27:19,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:27:19,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:19,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:27:19,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:27:19,498 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-10-28 17:27:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:19,593 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-28 17:27:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:27:19,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-28 17:27:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:19,594 INFO L225 Difference]: With dead ends: 62 [2020-10-28 17:27:19,594 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 17:27:19,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:27:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 17:27:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-28 17:27:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 17:27:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-28 17:27:19,602 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 52 [2020-10-28 17:27:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:19,602 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-28 17:27:19,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:27:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-28 17:27:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 17:27:19,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:19,604 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:19,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 17:27:19,604 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2017780657, now seen corresponding path program 2 times [2020-10-28 17:27:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:19,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316042406] [2020-10-28 17:27:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:19,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:19,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:21,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:24,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:24,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 17:27:24,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:27:24,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 17:27:24,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:24,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:27:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:27:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:27:24,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:24,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:24,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:24,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:24,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:24,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:27:24,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:24,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:24,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:24,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 17:27:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:24,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:24,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:24,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 17:27:24,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:24,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 17:27:24,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:24,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:24,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:27:24,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:27:24,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:27:24,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:24,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 17:27:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:24,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:24,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:24,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:24,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 17:27:24,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:24,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 17:27:24,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:24,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:24,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:24,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:27:24,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:24,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:24,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:27:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:24,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:24,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:24,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:24,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 17:27:24,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:24,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 17:27:24,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:24,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:24,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:24,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:27:24,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:24,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-28 17:27:24,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316042406] [2020-10-28 17:27:24,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:24,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:27:24,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499964128] [2020-10-28 17:27:24,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:27:24,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:24,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:27:24,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:27:24,786 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 6 states. [2020-10-28 17:27:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:24,937 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-28 17:27:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:27:24,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-28 17:27:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:24,938 INFO L225 Difference]: With dead ends: 63 [2020-10-28 17:27:24,939 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 17:27:24,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:27:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 17:27:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-28 17:27:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 17:27:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-28 17:27:24,946 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 54 [2020-10-28 17:27:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:24,946 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-28 17:27:24,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:27:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-28 17:27:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 17:27:24,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:24,947 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:24,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 17:27:24,948 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash -315426001, now seen corresponding path program 3 times [2020-10-28 17:27:24,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:24,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786505500] [2020-10-28 17:27:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:24,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:25,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:25,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:26,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:29,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:29,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 17:27:29,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:27:29,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 17:27:29,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:29,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:27:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 17:27:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 17:27:29,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:30,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:30,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:30,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:30,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:30,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:27:30,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:30,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:30,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:30,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:30,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:30,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:30,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 17:27:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:30,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:30,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:27:30,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 17:27:30,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:30,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:30,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 17:27:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:30,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:30,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:27:30,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:30,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 17:27:30,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:30,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:30,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:30,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:30,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:30,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:30,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 17:27:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:30,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:30,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:27:30,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:30,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 17:27:30,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:30,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 17:27:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:30,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-28 17:27:30,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786505500] [2020-10-28 17:27:30,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:30,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:27:30,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289006866] [2020-10-28 17:27:30,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:27:30,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:30,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:27:30,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:27:30,190 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-10-28 17:27:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:30,275 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-28 17:27:30,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:27:30,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-28 17:27:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:30,277 INFO L225 Difference]: With dead ends: 61 [2020-10-28 17:27:30,277 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 17:27:30,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:27:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 17:27:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-28 17:27:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 17:27:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-28 17:27:30,289 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 60 [2020-10-28 17:27:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:30,289 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-28 17:27:30,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:27:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-28 17:27:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 17:27:30,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:30,293 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:30,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 17:27:30,294 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:30,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:30,294 INFO L82 PathProgramCache]: Analyzing trace with hash -932069075, now seen corresponding path program 4 times [2020-10-28 17:27:30,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:30,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69789600] [2020-10-28 17:27:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:30,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:30,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:32,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:35,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 17:27:35,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:27:35,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 17:27:35,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:35,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:35,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:27:35,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 17:27:35,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:27:35,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:35,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:35,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:35,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:35,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:35,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:27:35,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:35,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:35,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:35,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 17:27:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:35,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:27:35,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:35,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 17:27:35,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:35,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:35,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:35,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 17:27:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:35,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:35,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:27:35,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:35,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 17:27:35,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:35,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:35,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:35,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:35,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:35,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:35,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 17:27:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:35,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:35,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:27:35,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:35,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 17:27:35,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:35,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:27:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:27:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:27:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-28 17:27:35,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69789600] [2020-10-28 17:27:35,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:35,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:27:35,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222694314] [2020-10-28 17:27:35,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:27:35,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:35,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:27:35,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:27:35,564 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2020-10-28 17:27:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:35,792 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-28 17:27:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:27:35,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-28 17:27:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:35,794 INFO L225 Difference]: With dead ends: 71 [2020-10-28 17:27:35,794 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 17:27:35,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 17:27:35,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 17:27:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-28 17:27:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 17:27:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-28 17:27:35,810 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 62 [2020-10-28 17:27:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:35,810 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-28 17:27:35,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:27:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-28 17:27:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 17:27:35,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:35,815 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:35,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 17:27:35,815 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:35,816 INFO L82 PathProgramCache]: Analyzing trace with hash 47622827, now seen corresponding path program 5 times [2020-10-28 17:27:35,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:35,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001967290] [2020-10-28 17:27:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:35,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:38,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:40,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:40,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 17:27:40,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:27:40,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 17:27:40,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:40,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:27:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-28 17:27:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 17:27:40,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:40,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:40,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:40,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:40,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:40,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:40,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:27:40,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:40,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:40,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:40,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:40,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:40,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:27:40,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 17:27:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:40,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:40,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:40,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:40,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:27:40,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:40,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 17:27:40,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:40,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:40,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:40,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 17:27:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:40,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:40,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:41,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:41,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:27:41,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:41,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-28 17:27:41,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:41,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:41,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:41,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:41,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:41,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:41,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 17:27:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:41,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:41,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:41,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:27:41,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:41,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 17:27:41,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:41,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:41,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:27:41,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:27:41,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 17:27:41,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-28 17:27:41,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001967290] [2020-10-28 17:27:41,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:41,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 17:27:41,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680746176] [2020-10-28 17:27:41,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:27:41,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:41,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:27:41,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:27:41,136 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 8 states. [2020-10-28 17:27:41,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:41,432 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-28 17:27:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 17:27:41,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-28 17:27:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:41,434 INFO L225 Difference]: With dead ends: 74 [2020-10-28 17:27:41,434 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 17:27:41,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 17:27:41,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 17:27:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 17:27:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 17:27:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-28 17:27:41,441 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 68 [2020-10-28 17:27:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:41,441 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-28 17:27:41,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:27:41,442 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-28 17:27:41,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 17:27:41,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:41,443 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:41,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 17:27:41,443 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:41,444 INFO L82 PathProgramCache]: Analyzing trace with hash 309247401, now seen corresponding path program 6 times [2020-10-28 17:27:41,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:41,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579278356] [2020-10-28 17:27:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:41,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:42,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:42,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 17:27:42,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-28 17:27:42,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:42,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:27:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:27:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:27:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:42,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:42,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:42,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:42,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:42,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:42,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:27:42,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:42,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:42,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:42,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:42,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:42,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:42,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 17:27:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:42,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:42,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:42,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:42,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:42,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:27:42,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:42,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:27:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:42,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:42,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 17:27:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:42,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:42,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:42,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:42,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:42,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:27:42,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:42,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:42,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:42,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:27:42,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:42,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:42,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 17:27:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:42,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:42,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:42,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:42,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:42,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:27:42,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:42,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:42,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:42,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:27:42,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:42,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-10-28 17:27:42,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579278356] [2020-10-28 17:27:42,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:42,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:27:42,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395828156] [2020-10-28 17:27:42,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:27:42,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:42,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:27:42,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:27:42,954 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2020-10-28 17:27:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:43,086 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-28 17:27:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:27:43,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-28 17:27:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:43,087 INFO L225 Difference]: With dead ends: 80 [2020-10-28 17:27:43,087 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 17:27:43,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:27:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 17:27:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-28 17:27:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 17:27:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-28 17:27:43,096 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 74 [2020-10-28 17:27:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:43,096 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-28 17:27:43,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:27:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-28 17:27:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 17:27:43,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:43,098 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:43,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 17:27:43,098 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:43,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:43,098 INFO L82 PathProgramCache]: Analyzing trace with hash -135219957, now seen corresponding path program 7 times [2020-10-28 17:27:43,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:43,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347018645] [2020-10-28 17:27:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:43,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:44,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:44,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 17:27:44,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:44,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1670 [2020-10-28 17:27:44,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:44,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:44,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:27:44,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:27:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 17:27:44,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:44,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:44,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:44,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:44,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:44,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:44,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:27:44,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:44,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:44,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:44,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:44,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:44,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:44,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 17:27:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:44,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:44,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:44,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:44,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:44,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:27:44,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:44,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:27:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:44,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:44,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 17:27:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:44,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:44,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:44,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:44,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:44,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:27:44,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:44,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:44,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:44,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:27:44,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:44,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:44,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 17:27:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:44,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:44,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:44,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:44,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:44,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:27:44,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:44,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:27:44,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:44,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-10-28 17:27:44,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347018645] [2020-10-28 17:27:44,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:44,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 17:27:44,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954511203] [2020-10-28 17:27:44,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:27:44,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:44,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:27:44,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:27:44,923 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 8 states. [2020-10-28 17:27:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:45,047 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-10-28 17:27:45,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 17:27:45,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-10-28 17:27:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:45,049 INFO L225 Difference]: With dead ends: 81 [2020-10-28 17:27:45,049 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 17:27:45,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:27:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 17:27:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 17:27:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 17:27:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-28 17:27:45,057 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 76 [2020-10-28 17:27:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:45,057 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-28 17:27:45,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:27:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-28 17:27:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 17:27:45,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:45,058 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:45,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 17:27:45,059 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2066588691, now seen corresponding path program 8 times [2020-10-28 17:27:45,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:45,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048803271] [2020-10-28 17:27:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:45,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:45,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:45,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 17:27:45,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:45,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-28 17:27:45,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:45,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:27:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 17:27:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:27:45,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:45,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:45,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:45,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:45,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:45,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:45,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:27:45,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:45,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:45,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:45,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:45,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:45,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:45,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:27:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:45,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:45,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:45,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:45,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:27:45,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:45,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:45,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:45,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 17:27:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:45,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:45,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:45,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:45,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:45,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:27:45,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:45,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:45,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:45,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 17:27:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:45,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:45,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:45,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:45,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:45,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 17:27:45,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:45,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:45,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:45,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:27:45,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:45,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2020-10-28 17:27:45,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048803271] [2020-10-28 17:27:45,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:45,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:27:45,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654825434] [2020-10-28 17:27:45,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:27:45,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:27:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:27:45,638 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 6 states. [2020-10-28 17:27:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:45,765 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-10-28 17:27:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:27:45,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-28 17:27:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:45,767 INFO L225 Difference]: With dead ends: 75 [2020-10-28 17:27:45,767 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 17:27:45,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:27:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 17:27:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-28 17:27:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 17:27:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-28 17:27:45,785 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 78 [2020-10-28 17:27:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:45,785 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-28 17:27:45,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:27:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-28 17:27:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 17:27:45,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:45,787 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:45,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 17:27:45,787 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:45,789 INFO L82 PathProgramCache]: Analyzing trace with hash -625751445, now seen corresponding path program 9 times [2020-10-28 17:27:45,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:45,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010525741] [2020-10-28 17:27:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:45,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:46,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:46,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 17:27:46,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-28 17:27:46,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:46,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:27:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 17:27:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:27:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:46,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:27:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:46,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:46,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:46,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:27:46,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:46,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:27:46,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:46,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:46,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:46,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:27:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:46,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:46,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:46,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:46,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:46,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:27:46,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:46,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:46,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:46,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:46,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:46,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:46,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 17:27:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:46,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:46,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:46,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:46,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:46,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:27:46,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:46,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:46,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:27:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:46,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:46,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 17:27:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:46,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:46,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 17:27:46,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:27:46,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 17:27:46,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:46,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:27:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:27:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:27:46,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:27:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2020-10-28 17:27:46,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010525741] [2020-10-28 17:27:46,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:27:46,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:27:46,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895761522] [2020-10-28 17:27:46,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:27:46,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:27:46,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:27:46,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:27:46,414 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 7 states. [2020-10-28 17:27:46,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:27:46,565 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-10-28 17:27:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:27:46,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-28 17:27:46,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:27:46,566 INFO L225 Difference]: With dead ends: 76 [2020-10-28 17:27:46,566 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 17:27:46,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:27:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 17:27:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 17:27:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 17:27:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-28 17:27:46,573 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 80 [2020-10-28 17:27:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:27:46,573 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-28 17:27:46,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:27:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-28 17:27:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 17:27:46,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:27:46,574 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:27:46,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 17:27:46,575 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:27:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:27:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1039372649, now seen corresponding path program 10 times [2020-10-28 17:27:46,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:27:46,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205802533] [2020-10-28 17:27:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:27:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:27:47,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:49,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:27:51,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:27:51,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 17:27:51,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:27:51,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 17:27:51,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:27:51,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:27:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-28 17:27:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 17:27:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 17:27:51,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0