/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=SHALLOWEST --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/array-examples/standard_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:17:39,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:17:39,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:17:39,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:17:39,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:17:39,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:17:39,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:17:39,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:17:39,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:17:39,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:17:39,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:17:39,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:17:39,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:17:39,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:17:39,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:17:39,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:17:39,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:17:39,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:17:39,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:17:39,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:17:39,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:17:39,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:17:39,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:17:39,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:17:39,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:17:39,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:17:39,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:17:39,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:17:39,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:17:39,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:17:39,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:17:39,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:17:39,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:17:39,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:17:39,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:17:39,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:17:39,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:17:39,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:17:39,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:17:39,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:17:39,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:17:39,781 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 [2020-10-26 19:17:39,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:17:39,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:17:39,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:17:39,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:17:39,843 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:17:39,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:17:39,843 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:17:39,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:17:39,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:17:39,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:17:39,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:17:39,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:17:39,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:17:39,845 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:17:39,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:17:39,845 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:17:39,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:17:39,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:17:39,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:17:39,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:17:39,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:17:39,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:17:39,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:17:39,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:17:39,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:17:39,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:17:39,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:17:39,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:17:39,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:17:39,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:17:40,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:17:40,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:17:40,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:17:40,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:17:40,349 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:17:40,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2020-10-26 19:17:40,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bee5ddb56/6d64f8459a2b472c9719896be7763833/FLAGba4df6436 [2020-10-26 19:17:41,081 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:17:41,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2020-10-26 19:17:41,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bee5ddb56/6d64f8459a2b472c9719896be7763833/FLAGba4df6436 [2020-10-26 19:17:41,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bee5ddb56/6d64f8459a2b472c9719896be7763833 [2020-10-26 19:17:41,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:17:41,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:17:41,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:41,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:17:41,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:17:41,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe52319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41, skipping insertion in model container [2020-10-26 19:17:41,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:17:41,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:17:41,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:41,669 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:17:41,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:41,718 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:17:41,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41 WrapperNode [2020-10-26 19:17:41,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:41,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:17:41,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:17:41,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:17:41,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (1/1) ... [2020-10-26 19:17:41,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:17:41,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:17:41,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:17:41,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:17:41,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (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 [2020-10-26 19:17:41,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:17:41,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:17:41,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:17:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:17:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:17:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:17:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:17:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:17:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:17:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:17:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:17:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:17:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:17:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:17:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:17:41,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:17:41,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:17:41,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:17:41,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:17:41,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:17:42,545 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:17:42,546 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-26 19:17:42,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:42 BoogieIcfgContainer [2020-10-26 19:17:42,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:17:42,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:17:42,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:17:42,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:17:42,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:17:41" (1/3) ... [2020-10-26 19:17:42,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6439a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:42, skipping insertion in model container [2020-10-26 19:17:42,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:41" (2/3) ... [2020-10-26 19:17:42,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6439a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:42, skipping insertion in model container [2020-10-26 19:17:42,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:42" (3/3) ... [2020-10-26 19:17:42,559 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2020-10-26 19:17:42,574 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:17:42,580 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:17:42,596 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:17:42,627 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:17:42,628 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:17:42,628 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:17:42,628 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:17:42,628 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:17:42,629 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:17:42,629 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:17:42,629 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:17:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-26 19:17:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:17:42,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:42,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:42,658 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:42,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1163458024, now seen corresponding path program 1 times [2020-10-26 19:17:42,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:42,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360845518] [2020-10-26 19:17:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:42,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:43,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:44,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:17:44,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:17:44,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1784 [2020-10-26 19:17:44,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:44,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:44,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:17:44,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:44,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:17:44,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:44,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:44,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:44,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:44,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:17:44,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:44,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360845518] [2020-10-26 19:17:44,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:44,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:17:44,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676143115] [2020-10-26 19:17:44,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:17:44,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:17:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:17:44,758 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-26 19:17:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:44,947 INFO L93 Difference]: Finished difference Result 83 states and 117 transitions. [2020-10-26 19:17:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:17:44,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-26 19:17:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:44,959 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:17:44,960 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:17:44,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:17:45,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:17:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-26 19:17:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:17:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-26 19:17:45,041 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2020-10-26 19:17:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:45,042 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-26 19:17:45,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:17:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-26 19:17:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:17:45,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:45,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:45,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:17:45,044 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:45,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1189623162, now seen corresponding path program 1 times [2020-10-26 19:17:45,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:45,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418628132] [2020-10-26 19:17:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:45,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:45,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:47,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:17:47,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:17:47,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2906 [2020-10-26 19:17:47,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:47,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:17:47,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:47,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:17:47,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:48,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:48,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:48,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:48,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:48,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:48,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418628132] [2020-10-26 19:17:48,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:48,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:17:48,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757605985] [2020-10-26 19:17:48,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:17:48,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:48,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:17:48,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:17:48,053 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 4 states. [2020-10-26 19:17:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:48,225 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-26 19:17:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:17:48,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 19:17:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:48,228 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:17:48,228 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:17:48,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:17:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:17:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-26 19:17:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:17:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-26 19:17:48,239 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2020-10-26 19:17:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:48,239 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-26 19:17:48,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:17:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-26 19:17:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:17:48,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:48,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:48,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:17:48,241 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash -627850268, now seen corresponding path program 1 times [2020-10-26 19:17:48,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:48,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678799317] [2020-10-26 19:17:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:48,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:52,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:17:52,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:17:52,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4659 [2020-10-26 19:17:52,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:17:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:17:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:53,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:53,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:53,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:53,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:53,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:17:53,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:53,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:53,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:53,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:53,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:53,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678799317] [2020-10-26 19:17:53,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:53,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:17:53,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484118002] [2020-10-26 19:17:53,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:17:53,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:53,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:17:53,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:17:53,054 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2020-10-26 19:17:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:53,301 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-10-26 19:17:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:17:53,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-26 19:17:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:53,303 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:17:53,303 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:17:53,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:17:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:17:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-26 19:17:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:17:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-26 19:17:53,325 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2020-10-26 19:17:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:53,326 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-26 19:17:53,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:17:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-26 19:17:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:17:53,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:53,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:53,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:17:53,329 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:53,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:53,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1929978430, now seen corresponding path program 2 times [2020-10-26 19:17:53,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:53,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832620486] [2020-10-26 19:17:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:53,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:58,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:58,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:17:58,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:17:58,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:17:58,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:58,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:17:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:17:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:17:58,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:58,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:58,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:58,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:58,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:17:58,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:58,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:58,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832620486] [2020-10-26 19:17:58,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:58,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:17:58,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334448358] [2020-10-26 19:17:58,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:17:58,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:58,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:17:58,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:17:58,481 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 6 states. [2020-10-26 19:17:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:58,718 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-26 19:17:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:17:58,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-26 19:17:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:58,720 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:17:58,720 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:17:58,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:17:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:17:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-26 19:17:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:17:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-26 19:17:58,735 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 31 [2020-10-26 19:17:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:58,736 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-26 19:17:58,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:17:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-26 19:17:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:17:58,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:58,741 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-10-26 19:17:58,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:17:58,741 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash 855308320, now seen corresponding path program 3 times [2020-10-26 19:17:58,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:58,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39746684] [2020-10-26 19:17:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:58,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:58,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:58,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:58,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:58,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:58,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:59,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:03,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:03,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:18:03,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:18:03,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:18:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:18:03,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:03,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:03,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:03,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:03,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:03,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:03,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:03,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:03,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:03,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:03,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:03,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:03,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39746684] [2020-10-26 19:18:03,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:03,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:18:03,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415094019] [2020-10-26 19:18:03,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:18:03,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:03,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:18:03,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:18:03,941 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-10-26 19:18:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:04,149 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-10-26 19:18:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:18:04,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-26 19:18:04,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:04,151 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:18:04,152 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:18:04,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:18:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:18:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-26 19:18:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:18:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-26 19:18:04,159 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 33 [2020-10-26 19:18:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:04,159 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-26 19:18:04,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:18:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-26 19:18:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:18:04,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:04,161 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:04,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:18:04,161 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:04,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:04,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1751249662, now seen corresponding path program 4 times [2020-10-26 19:18:04,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:04,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014333191] [2020-10-26 19:18:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:04,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:04,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:04,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:04,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:04,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:04,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:09,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:09,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:18:09,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:09,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:18:09,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:09,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:18:09,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:18:09,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:18:09,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:09,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:09,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:09,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:09,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:09,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:18:09,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:09,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:09,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:09,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:09,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:09,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014333191] [2020-10-26 19:18:09,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:09,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:18:09,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746610452] [2020-10-26 19:18:09,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:18:09,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:09,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:18:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:18:09,316 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 8 states. [2020-10-26 19:18:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:09,547 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-10-26 19:18:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:18:09,549 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-26 19:18:09,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:09,551 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:18:09,551 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:18:09,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:18:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:18:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-26 19:18:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:18:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-26 19:18:09,567 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 35 [2020-10-26 19:18:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:09,568 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-26 19:18:09,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:18:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-26 19:18:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:18:09,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:09,569 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:09,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:18:09,572 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:09,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:09,573 INFO L82 PathProgramCache]: Analyzing trace with hash -537547172, now seen corresponding path program 5 times [2020-10-26 19:18:09,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:09,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334154588] [2020-10-26 19:18:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:09,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:09,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:09,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:09,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:09,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:10,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:14,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:14,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:18:14,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:14,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:14,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:14,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:18:14,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:14,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:18:14,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:14,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:14,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:14,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:14,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:14,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:14,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:14,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:14,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:14,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:14,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:14,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:14,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334154588] [2020-10-26 19:18:14,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:14,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:18:14,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287031493] [2020-10-26 19:18:14,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:18:14,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:14,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:18:14,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:18:14,755 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 9 states. [2020-10-26 19:18:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:14,969 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-26 19:18:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:18:14,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-26 19:18:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:14,972 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:18:14,973 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:18:14,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:18:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:18:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-26 19:18:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:18:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-26 19:18:14,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 37 [2020-10-26 19:18:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:14,983 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-26 19:18:14,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:18:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-26 19:18:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:18:14,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:14,987 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:14,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:18:14,987 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1048049094, now seen corresponding path program 6 times [2020-10-26 19:18:14,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:14,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835353902] [2020-10-26 19:18:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:15,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:15,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:20,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:18:20,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:20,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:18:20,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:18:20,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:20,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:18:20,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:20,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:20,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:20,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:20,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:20,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835353902] [2020-10-26 19:18:20,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:20,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:18:20,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915867928] [2020-10-26 19:18:20,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:18:20,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:20,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:18:20,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:18:20,279 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 10 states. [2020-10-26 19:18:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:20,517 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-26 19:18:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:18:20,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-26 19:18:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:20,519 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:18:20,519 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:18:20,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:18:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:18:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-26 19:18:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:18:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-26 19:18:20,526 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 39 [2020-10-26 19:18:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:20,526 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-26 19:18:20,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:18:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-26 19:18:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:18:20,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:20,527 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:20,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:18:20,528 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:20,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2014124392, now seen corresponding path program 7 times [2020-10-26 19:18:20,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:20,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253802916] [2020-10-26 19:18:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:20,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:20,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:21,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:25,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:25,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:18:25,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:25,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:25,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:18:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:18:25,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:25,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:25,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:25,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:25,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:25,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:25,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:25,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:25,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:25,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:25,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:25,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:25,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253802916] [2020-10-26 19:18:25,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:25,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:18:25,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823681028] [2020-10-26 19:18:25,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:18:25,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:18:25,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:18:25,768 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 11 states. [2020-10-26 19:18:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:26,088 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-10-26 19:18:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:18:26,089 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-26 19:18:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:26,091 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:18:26,091 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:18:26,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:18:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:18:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-26 19:18:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:18:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-26 19:18:26,106 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 41 [2020-10-26 19:18:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:26,106 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-26 19:18:26,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:18:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-26 19:18:26,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:18:26,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:26,108 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:26,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:18:26,108 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1595417462, now seen corresponding path program 8 times [2020-10-26 19:18:26,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:26,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405166241] [2020-10-26 19:18:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:26,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:26,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:26,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:26,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:26,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:26,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:26,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:31,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:18:31,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:31,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:18:31,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:31,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:18:31,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:31,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:18:31,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:31,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:31,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:31,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:31,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:31,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:31,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:31,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:31,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:31,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:31,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405166241] [2020-10-26 19:18:31,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:31,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:18:31,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099411078] [2020-10-26 19:18:31,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:18:31,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:31,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:18:31,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:18:31,354 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 12 states. [2020-10-26 19:18:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:31,634 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-26 19:18:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:18:31,635 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-26 19:18:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:31,636 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:18:31,636 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:18:31,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:18:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:18:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-26 19:18:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:18:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-26 19:18:31,647 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 43 [2020-10-26 19:18:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:31,648 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-26 19:18:31,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:18:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-26 19:18:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:18:31,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:31,652 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:31,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:18:31,652 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:31,652 INFO L82 PathProgramCache]: Analyzing trace with hash 31563988, now seen corresponding path program 9 times [2020-10-26 19:18:31,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:31,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129372943] [2020-10-26 19:18:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:31,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:31,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:32,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:36,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:36,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:18:36,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:18:36,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:36,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:18:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:18:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:36,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:36,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:36,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:36,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:36,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:36,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:36,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:36,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:36,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:36,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:36,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129372943] [2020-10-26 19:18:36,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:36,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:18:36,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105640523] [2020-10-26 19:18:36,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:18:36,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:36,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:18:36,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:18:36,960 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 13 states. [2020-10-26 19:18:37,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:37,247 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-26 19:18:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:18:37,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-26 19:18:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:37,248 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:18:37,249 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:18:37,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:18:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:18:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-26 19:18:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:18:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-26 19:18:37,263 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 45 [2020-10-26 19:18:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:37,265 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-26 19:18:37,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:18:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-26 19:18:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:18:37,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:37,266 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:37,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:18:37,266 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash 406929074, now seen corresponding path program 10 times [2020-10-26 19:18:37,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:37,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561981928] [2020-10-26 19:18:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:37,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:37,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:37,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:37,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:37,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:37,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:39,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:42,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:18:42,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:42,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:42,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:42,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:18:42,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:42,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:18:42,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:42,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:42,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:42,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:42,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:42,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:42,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:42,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:42,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:42,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:42,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561981928] [2020-10-26 19:18:42,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:42,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:18:42,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694423387] [2020-10-26 19:18:42,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:18:42,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:42,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:18:42,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:18:42,563 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 14 states. [2020-10-26 19:18:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:42,873 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-26 19:18:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:18:42,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-26 19:18:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:42,876 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:18:42,876 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:18:42,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:18:42,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:18:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-26 19:18:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:18:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-26 19:18:42,884 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 47 [2020-10-26 19:18:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:42,884 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-26 19:18:42,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:18:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-26 19:18:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:18:42,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:42,886 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:42,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:18:42,886 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:42,887 INFO L82 PathProgramCache]: Analyzing trace with hash 355523856, now seen corresponding path program 11 times [2020-10-26 19:18:42,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:42,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350396993] [2020-10-26 19:18:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:42,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:43,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:47,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:47,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:18:47,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:47,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:18:47,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:47,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:18:47,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:47,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:18:47,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:48,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:48,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:48,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:48,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:48,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:48,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:48,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:48,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:48,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:48,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:48,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:48,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350396993] [2020-10-26 19:18:48,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:48,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:18:48,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654888496] [2020-10-26 19:18:48,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:18:48,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:48,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:18:48,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:18:48,218 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 15 states. [2020-10-26 19:18:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:48,544 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-10-26 19:18:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:18:48,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-26 19:18:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:48,546 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:18:48,546 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:18:48,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:18:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:18:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-26 19:18:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:18:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-26 19:18:48,553 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 49 [2020-10-26 19:18:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:48,553 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-26 19:18:48,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:18:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-26 19:18:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:18:48,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:48,554 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:48,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:18:48,555 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:48,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1800250386, now seen corresponding path program 12 times [2020-10-26 19:18:48,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:48,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077780050] [2020-10-26 19:18:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:48,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:48,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:48,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:48,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:53,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:53,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:18:53,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:53,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:53,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:53,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:18:53,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:53,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:18:53,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:53,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:53,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:53,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:53,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:53,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:53,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:53,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:53,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:53,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:53,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:53,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:53,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077780050] [2020-10-26 19:18:53,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:53,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:18:53,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130142459] [2020-10-26 19:18:53,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:18:53,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:53,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:18:53,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:18:53,895 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 16 states. [2020-10-26 19:18:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:54,239 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-10-26 19:18:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:18:54,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-26 19:18:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:54,240 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:18:54,241 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:18:54,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:18:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:18:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-26 19:18:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:18:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-26 19:18:54,250 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 51 [2020-10-26 19:18:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:54,251 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-26 19:18:54,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:18:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-26 19:18:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:18:54,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:54,252 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:54,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:18:54,252 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash 969907020, now seen corresponding path program 13 times [2020-10-26 19:18:54,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:54,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880696257] [2020-10-26 19:18:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:54,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:59,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:59,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:18:59,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:59,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:18:59,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:59,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:18:59,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:59,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:18:59,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:59,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:59,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:59,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:59,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:59,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:59,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:59,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:59,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:18:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:59,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880696257] [2020-10-26 19:18:59,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:59,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:18:59,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462966822] [2020-10-26 19:18:59,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:18:59,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:59,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:18:59,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:18:59,765 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 17 states. [2020-10-26 19:19:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:00,144 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-26 19:19:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:19:00,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-26 19:19:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:00,146 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:19:00,146 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:19:00,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:19:00,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:19:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-26 19:19:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:19:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-26 19:19:00,159 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 53 [2020-10-26 19:19:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:00,160 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-26 19:19:00,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:19:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-26 19:19:00,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:19:00,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:00,161 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:00,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:19:00,161 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash 211450666, now seen corresponding path program 14 times [2020-10-26 19:19:00,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:00,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270530918] [2020-10-26 19:19:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:00,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:01,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:05,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:19:05,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:05,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:19:05,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:19:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:19:05,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:05,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:05,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:05,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:05,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:05,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:05,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:05,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:05,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:05,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:05,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:05,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:05,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270530918] [2020-10-26 19:19:05,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:05,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:19:05,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795623773] [2020-10-26 19:19:05,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:19:05,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:05,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:19:05,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:19:05,698 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 18 states. [2020-10-26 19:19:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:05,968 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-10-26 19:19:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:19:05,969 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-26 19:19:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:05,970 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:19:05,970 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:19:05,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:19:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:19:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-26 19:19:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:19:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-26 19:19:05,979 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 55 [2020-10-26 19:19:05,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:05,980 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-26 19:19:05,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:19:05,981 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-26 19:19:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:19:05,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:05,981 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:05,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:19:05,982 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:05,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:05,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1479334792, now seen corresponding path program 15 times [2020-10-26 19:19:05,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:05,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322325384] [2020-10-26 19:19:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:06,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:07,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:11,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:19:11,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:11,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:19:11,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:11,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:19:11,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:11,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:19:11,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:11,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:11,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:11,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:11,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:11,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:11,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:11,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:11,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:11,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:11,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:11,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322325384] [2020-10-26 19:19:11,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:11,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:19:11,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520885490] [2020-10-26 19:19:11,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:19:11,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:11,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:19:11,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:19:11,428 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 19 states. [2020-10-26 19:19:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:11,742 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2020-10-26 19:19:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:19:11,743 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-26 19:19:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:11,744 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:19:11,744 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:19:11,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:19:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:19:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-26 19:19:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:19:11,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-26 19:19:11,750 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 57 [2020-10-26 19:19:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:11,750 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-26 19:19:11,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:19:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-26 19:19:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:19:11,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:11,751 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:11,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:19:11,752 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash 145267814, now seen corresponding path program 16 times [2020-10-26 19:19:11,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:11,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823688134] [2020-10-26 19:19:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:11,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:12,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:12,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:12,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:16,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:19:16,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:16,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:19:16,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:19:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:19:16,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:17,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:17,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:17,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:17,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:17,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:17,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:17,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:17,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:17,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:17,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:17,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823688134] [2020-10-26 19:19:17,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:17,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:19:17,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152053849] [2020-10-26 19:19:17,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:19:17,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:17,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:19:17,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:19:17,270 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 20 states. [2020-10-26 19:19:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:17,649 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2020-10-26 19:19:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:19:17,650 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-26 19:19:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:17,651 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:19:17,651 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:19:17,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:19:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:19:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-26 19:19:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:19:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-26 19:19:17,659 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 59 [2020-10-26 19:19:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:17,660 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-26 19:19:17,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:19:17,660 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-26 19:19:17,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:19:17,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:17,661 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:17,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:19:17,668 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1992843836, now seen corresponding path program 17 times [2020-10-26 19:19:17,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:17,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320141141] [2020-10-26 19:19:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:17,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:17,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:17,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:17,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:18,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:18,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:22,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:19:22,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:19:22,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:19:22,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:22,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:19:22,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:22,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:19:22,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:23,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:23,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:23,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:23,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:23,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:23,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:23,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:23,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:23,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:23,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:23,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320141141] [2020-10-26 19:19:23,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:23,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:19:23,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415985868] [2020-10-26 19:19:23,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:19:23,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:19:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:19:23,224 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 21 states. [2020-10-26 19:19:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:23,586 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-10-26 19:19:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:19:23,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-10-26 19:19:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:23,587 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:19:23,588 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:19:23,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:19:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:19:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-26 19:19:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:19:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-26 19:19:23,601 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 61 [2020-10-26 19:19:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:23,601 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-26 19:19:23,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:19:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-26 19:19:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:19:23,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:23,602 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:23,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:19:23,602 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash 571195298, now seen corresponding path program 18 times [2020-10-26 19:19:23,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:23,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31091531] [2020-10-26 19:19:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:23,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:25,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:25,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:28,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:19:28,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:19:28,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:19:28,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:28,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:19:28,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:28,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:19:28,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:29,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:29,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:29,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:29,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:29,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:29,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:29,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:29,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31091531] [2020-10-26 19:19:29,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:29,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:19:29,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941078993] [2020-10-26 19:19:29,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:19:29,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:29,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:19:29,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:19:29,215 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 22 states. [2020-10-26 19:19:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:29,573 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-26 19:19:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:19:29,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-26 19:19:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:29,575 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:19:29,575 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:19:29,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:19:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:19:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-26 19:19:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:19:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-10-26 19:19:29,581 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 63 [2020-10-26 19:19:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:29,581 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-10-26 19:19:29,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:19:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-10-26 19:19:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:19:29,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:29,582 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:29,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:19:29,582 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:29,583 INFO L82 PathProgramCache]: Analyzing trace with hash -698424832, now seen corresponding path program 19 times [2020-10-26 19:19:29,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:29,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69044472] [2020-10-26 19:19:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:29,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:31,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:31,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:34,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:34,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:19:34,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:19:34,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:19:34,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:19:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:19:34,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:35,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:35,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:35,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:35,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:35,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:35,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:35,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:35,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:35,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:35,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:35,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69044472] [2020-10-26 19:19:35,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:35,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:19:35,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623653733] [2020-10-26 19:19:35,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:19:35,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:35,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:19:35,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:19:35,208 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 23 states. [2020-10-26 19:19:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:35,584 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-26 19:19:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:19:35,584 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-10-26 19:19:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:35,585 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:19:35,585 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:19:35,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:19:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:19:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-26 19:19:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:19:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-10-26 19:19:35,595 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 65 [2020-10-26 19:19:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:35,595 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-10-26 19:19:35,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:19:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-10-26 19:19:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:19:35,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:35,596 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:35,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:19:35,597 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:35,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1032657698, now seen corresponding path program 20 times [2020-10-26 19:19:35,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:35,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784565485] [2020-10-26 19:19:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:35,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:37,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:37,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:40,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:40,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:19:40,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:19:40,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:19:40,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:40,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:19:40,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:40,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:19:40,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:41,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:41,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:41,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:41,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:41,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:41,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:41,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:41,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:41,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:41,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:41,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784565485] [2020-10-26 19:19:41,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:41,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:19:41,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815665705] [2020-10-26 19:19:41,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:19:41,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:41,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:19:41,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:19:41,283 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 24 states. [2020-10-26 19:19:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:41,716 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-26 19:19:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:19:41,721 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-10-26 19:19:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:41,722 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:19:41,722 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:19:41,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:19:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:19:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-26 19:19:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:19:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-10-26 19:19:41,726 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 67 [2020-10-26 19:19:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:41,726 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-10-26 19:19:41,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:19:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-10-26 19:19:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:19:41,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:41,727 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:41,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:19:41,727 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:41,727 INFO L82 PathProgramCache]: Analyzing trace with hash -107894724, now seen corresponding path program 21 times [2020-10-26 19:19:41,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:41,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512713396] [2020-10-26 19:19:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:41,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:43,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:43,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:46,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:46,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:19:46,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:19:46,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:19:46,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:19:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:46,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:19:46,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:47,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:47,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:47,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:47,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:47,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:47,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:47,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:47,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512713396] [2020-10-26 19:19:47,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:47,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:19:47,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076360720] [2020-10-26 19:19:47,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:19:47,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:19:47,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:19:47,514 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 25 states. [2020-10-26 19:19:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:47,885 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2020-10-26 19:19:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:19:47,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-26 19:19:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:47,887 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:19:47,887 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:19:47,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:19:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:19:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-26 19:19:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:19:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-10-26 19:19:47,892 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 69 [2020-10-26 19:19:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:47,893 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-10-26 19:19:47,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:19:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-10-26 19:19:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:19:47,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:47,893 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:47,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:19:47,894 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:47,894 INFO L82 PathProgramCache]: Analyzing trace with hash -468906982, now seen corresponding path program 22 times [2020-10-26 19:19:47,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:47,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005181068] [2020-10-26 19:19:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:47,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:48,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:48,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:52,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:52,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:19:52,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:52,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:19:52,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:19:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:19:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:53,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:53,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:53,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:53,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:53,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:53,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:53,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:53,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:53,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005181068] [2020-10-26 19:19:53,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:53,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:19:53,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136547515] [2020-10-26 19:19:53,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:19:53,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:53,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:19:53,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:19:53,731 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 26 states. [2020-10-26 19:19:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:54,030 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2020-10-26 19:19:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:19:54,030 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-10-26 19:19:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:54,032 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:19:54,032 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:19:54,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:19:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:19:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-26 19:19:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:19:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-10-26 19:19:54,037 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 71 [2020-10-26 19:19:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:54,038 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-10-26 19:19:54,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:19:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-10-26 19:19:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:19:54,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:54,038 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:54,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:19:54,039 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:54,039 INFO L82 PathProgramCache]: Analyzing trace with hash 490664056, now seen corresponding path program 23 times [2020-10-26 19:19:54,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:54,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379987154] [2020-10-26 19:19:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:54,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:59,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:59,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:59,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:59,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:59,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:59,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:59,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:59,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:59,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379987154] [2020-10-26 19:19:59,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:59,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:19:59,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147158883] [2020-10-26 19:19:59,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:19:59,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:59,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:19:59,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:19:59,931 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 27 states. [2020-10-26 19:20:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:00,415 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2020-10-26 19:20:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:20:00,416 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2020-10-26 19:20:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:00,417 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:20:00,417 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:20:00,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:20:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:20:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-26 19:20:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:20:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-10-26 19:20:00,423 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 73 [2020-10-26 19:20:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:00,424 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-10-26 19:20:00,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:20:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-10-26 19:20:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:20:00,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:00,425 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:00,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:20:00,425 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash -779537066, now seen corresponding path program 24 times [2020-10-26 19:20:00,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:00,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085032258] [2020-10-26 19:20:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:00,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:00,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:00,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:00,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:00,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:05,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:05,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:20:05,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:20:05,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:20:05,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:05,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:20:05,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:05,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:20:05,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:06,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:06,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:06,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:06,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:06,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:06,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:06,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:06,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085032258] [2020-10-26 19:20:06,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:06,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:20:06,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202328227] [2020-10-26 19:20:06,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:20:06,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:06,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:20:06,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:20:06,346 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 28 states. [2020-10-26 19:20:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:06,861 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2020-10-26 19:20:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:20:06,862 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-10-26 19:20:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:06,863 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:20:06,863 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:20:06,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:20:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:20:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-26 19:20:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:20:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-26 19:20:06,869 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 75 [2020-10-26 19:20:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:06,869 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-26 19:20:06,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:20:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-26 19:20:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:20:06,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:06,871 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:06,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:20:06,871 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1672103244, now seen corresponding path program 25 times [2020-10-26 19:20:06,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:06,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351880246] [2020-10-26 19:20:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:06,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:07,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:07,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:11,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:11,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:20:11,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:20:11,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:20:11,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:20:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:11,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:20:11,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:12,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:12,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:12,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:12,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:12,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:12,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:12,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:12,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351880246] [2020-10-26 19:20:12,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:12,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:20:12,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694526054] [2020-10-26 19:20:12,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:20:12,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:12,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:20:12,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:20:12,902 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 29 states. [2020-10-26 19:20:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:13,434 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2020-10-26 19:20:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:20:13,435 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-10-26 19:20:13,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:13,436 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:20:13,436 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:20:13,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:20:13,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:20:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-26 19:20:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:20:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-10-26 19:20:13,442 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 77 [2020-10-26 19:20:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:13,442 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-10-26 19:20:13,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:20:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-10-26 19:20:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:20:13,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:13,443 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:13,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:20:13,443 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:13,444 INFO L82 PathProgramCache]: Analyzing trace with hash -434741102, now seen corresponding path program 26 times [2020-10-26 19:20:13,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:13,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880561799] [2020-10-26 19:20:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:13,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:13,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:13,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:13,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:13,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:18,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:18,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:20:18,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:20:18,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:20:18,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:20:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:20:18,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:19,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:19,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:19,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:19,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:19,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:19,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:20:19,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:19,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:19,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:19,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:19,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:20:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:19,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880561799] [2020-10-26 19:20:19,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:19,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:20:19,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650110296] [2020-10-26 19:20:19,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:20:19,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:19,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:20:19,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:20:19,492 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 30 states. [2020-10-26 19:20:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:19,847 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2020-10-26 19:20:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:20:19,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 79 [2020-10-26 19:20:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:19,849 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:20:19,850 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:20:19,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:20:19,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:20:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-26 19:20:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:20:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-10-26 19:20:19,855 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 79 [2020-10-26 19:20:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:19,856 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-10-26 19:20:19,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:20:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-10-26 19:20:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:20:19,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:19,857 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:19,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:20:19,857 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:19,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1035663632, now seen corresponding path program 27 times [2020-10-26 19:20:19,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:19,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252793525] [2020-10-26 19:20:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:19,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:19,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:19,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:20,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:24,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:24,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:20:24,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:24,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-26 19:20:24,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:24,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:20:24,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:24,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:20:24,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:26,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:26,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:26,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:26,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:26,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:26,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:20:26,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:26,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:26,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:26,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:26,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:26,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252793525] [2020-10-26 19:20:26,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:26,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:20:26,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779777447] [2020-10-26 19:20:26,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:20:26,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:20:26,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:20:26,018 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 31 states. [2020-10-26 19:20:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:26,582 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-10-26 19:20:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:20:26,586 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2020-10-26 19:20:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:26,587 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:20:26,587 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:20:26,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:20:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:20:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-26 19:20:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:20:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2020-10-26 19:20:26,593 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 81 [2020-10-26 19:20:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:26,593 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2020-10-26 19:20:26,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:20:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2020-10-26 19:20:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:20:26,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:26,594 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:26,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:20:26,595 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:26,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1298369998, now seen corresponding path program 28 times [2020-10-26 19:20:26,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:26,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999983070] [2020-10-26 19:20:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:26,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:26,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:26,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:26,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:31,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:31,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:20:31,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:31,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 19:20:31,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:31,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:20:31,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:31,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:20:31,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:32,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:32,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:32,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:32,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:32,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:32,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:32,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:32,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:32,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999983070] [2020-10-26 19:20:32,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:32,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:20:32,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176714830] [2020-10-26 19:20:32,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:20:32,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:32,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:20:32,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:20:32,866 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand 32 states. [2020-10-26 19:20:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:33,228 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-10-26 19:20:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:20:33,229 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 83 [2020-10-26 19:20:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:33,230 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:20:33,230 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:20:33,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:20:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:20:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-26 19:20:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:20:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-10-26 19:20:33,237 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 83 [2020-10-26 19:20:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:33,237 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-10-26 19:20:33,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:20:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-10-26 19:20:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:20:33,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:33,238 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:33,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:20:33,239 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1963207380, now seen corresponding path program 29 times [2020-10-26 19:20:33,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:33,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023242048] [2020-10-26 19:20:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:33,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:33,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:33,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:33,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:39,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:39,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:39,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:39,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:39,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:39,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:39,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:39,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:39,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:39,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023242048] [2020-10-26 19:20:39,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:39,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:20:39,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084231649] [2020-10-26 19:20:39,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:20:39,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:39,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:20:39,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:20:39,580 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 33 states. [2020-10-26 19:20:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:40,169 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2020-10-26 19:20:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:20:40,170 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 85 [2020-10-26 19:20:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:40,172 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:20:40,172 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:20:40,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:20:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:20:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-26 19:20:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:20:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-10-26 19:20:40,179 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 85 [2020-10-26 19:20:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:40,179 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-10-26 19:20:40,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:20:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-10-26 19:20:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:20:40,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:40,181 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:40,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:20:40,181 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:40,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1012941558, now seen corresponding path program 30 times [2020-10-26 19:20:40,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:40,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107143452] [2020-10-26 19:20:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:40,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:40,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:40,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:40,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:45,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:45,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:20:45,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:45,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-26 19:20:45,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:45,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:20:45,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:45,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:20:45,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:46,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:46,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:46,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:46,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:46,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:46,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:46,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:46,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:46,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107143452] [2020-10-26 19:20:46,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:46,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:20:46,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369761504] [2020-10-26 19:20:46,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:20:46,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:20:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:20:46,612 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 34 states. [2020-10-26 19:20:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:47,211 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2020-10-26 19:20:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:20:47,212 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 87 [2020-10-26 19:20:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:47,214 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:20:47,214 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:20:47,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:20:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:20:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-26 19:20:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:20:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-26 19:20:47,220 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 87 [2020-10-26 19:20:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:47,220 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-26 19:20:47,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:20:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-26 19:20:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:20:47,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:47,222 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:47,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:20:47,222 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1659446632, now seen corresponding path program 31 times [2020-10-26 19:20:47,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:47,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115442320] [2020-10-26 19:20:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:47,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:47,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:47,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:47,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:52,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:52,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:20:52,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:20:52,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:20:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:20:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:53,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:53,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:53,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:53,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:53,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:53,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:53,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:53,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:53,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:53,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:53,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:53,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115442320] [2020-10-26 19:20:53,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:53,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:20:53,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734527359] [2020-10-26 19:20:53,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:20:53,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:53,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:20:53,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:20:53,696 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 35 states. [2020-10-26 19:20:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:54,211 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2020-10-26 19:20:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:20:54,212 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 89 [2020-10-26 19:20:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:54,213 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:20:54,213 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:20:54,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:20:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:20:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-26 19:20:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:20:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-26 19:20:54,220 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 89 [2020-10-26 19:20:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:54,221 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-26 19:20:54,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:20:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-26 19:20:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:20:54,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:54,222 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:54,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:20:54,222 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:54,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1434054214, now seen corresponding path program 32 times [2020-10-26 19:20:54,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:54,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943637210] [2020-10-26 19:20:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:54,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:54,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:59,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:59,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:20:59,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:59,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:20:59,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:20:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:20:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:00,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:00,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:00,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:00,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:00,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:00,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:00,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:00,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:00,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:00,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:00,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943637210] [2020-10-26 19:21:00,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:00,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:21:00,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706122822] [2020-10-26 19:21:00,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:21:00,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:21:00,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:21:00,802 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 36 states. [2020-10-26 19:21:01,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:01,329 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-10-26 19:21:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:21:01,330 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 91 [2020-10-26 19:21:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:01,332 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:21:01,332 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:21:01,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:21:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:21:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-26 19:21:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:21:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-10-26 19:21:01,338 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 91 [2020-10-26 19:21:01,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:01,339 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-10-26 19:21:01,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:21:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-10-26 19:21:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:21:01,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:01,340 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:01,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:21:01,340 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash -419694684, now seen corresponding path program 33 times [2020-10-26 19:21:01,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:01,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111240374] [2020-10-26 19:21:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:01,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:01,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:01,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:06,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:06,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:21:06,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:06,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:21:06,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:06,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:21:06,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:06,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:21:06,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:08,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:08,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:08,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:08,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:08,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:21:08,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:08,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:08,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:08,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:08,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111240374] [2020-10-26 19:21:08,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:08,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:21:08,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007223219] [2020-10-26 19:21:08,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:21:08,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:08,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:21:08,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:21:08,021 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand 37 states. [2020-10-26 19:21:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:08,558 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2020-10-26 19:21:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:21:08,558 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 93 [2020-10-26 19:21:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:08,559 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:21:08,560 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:21:08,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:21:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:21:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-26 19:21:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:21:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2020-10-26 19:21:08,565 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 93 [2020-10-26 19:21:08,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:08,565 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2020-10-26 19:21:08,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:21:08,565 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2020-10-26 19:21:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:21:08,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:08,567 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:08,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:21:08,567 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:08,570 INFO L82 PathProgramCache]: Analyzing trace with hash 539042178, now seen corresponding path program 34 times [2020-10-26 19:21:08,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:08,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214642314] [2020-10-26 19:21:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:08,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:08,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:08,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:13,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:13,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:21:13,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:13,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-26 19:21:13,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:13,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:21:13,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:13,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:21:13,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:15,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:15,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:15,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:15,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:15,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:15,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:15,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:15,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214642314] [2020-10-26 19:21:15,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:15,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:21:15,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506943825] [2020-10-26 19:21:15,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:21:15,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:15,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:21:15,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:21:15,293 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand 38 states. [2020-10-26 19:21:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:15,960 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2020-10-26 19:21:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:21:15,961 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 95 [2020-10-26 19:21:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:15,963 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:21:15,963 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 19:21:15,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:21:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 19:21:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-26 19:21:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:21:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2020-10-26 19:21:15,969 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 95 [2020-10-26 19:21:15,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:15,969 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2020-10-26 19:21:15,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:21:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2020-10-26 19:21:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:21:15,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:15,970 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:15,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:21:15,970 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1532802080, now seen corresponding path program 35 times [2020-10-26 19:21:15,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:15,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819600811] [2020-10-26 19:21:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:16,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:20,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:20,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:21:20,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:21:20,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:21:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:21:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:22,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:22,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:22,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:22,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:22,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:22,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:22,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:22,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:22,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:22,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:22,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:22,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819600811] [2020-10-26 19:21:22,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:22,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:21:22,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23976984] [2020-10-26 19:21:22,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:21:22,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:22,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:21:22,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:21:22,783 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand 39 states. [2020-10-26 19:21:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:23,454 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2020-10-26 19:21:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:21:23,455 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 97 [2020-10-26 19:21:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:23,457 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:21:23,457 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:21:23,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:21:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:21:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-26 19:21:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:21:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-10-26 19:21:23,463 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 97 [2020-10-26 19:21:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:23,464 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-10-26 19:21:23,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:21:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-10-26 19:21:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:21:23,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:23,465 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:23,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:21:23,465 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash 289691326, now seen corresponding path program 36 times [2020-10-26 19:21:23,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:23,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051482360] [2020-10-26 19:21:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:23,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:28,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:28,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:21:28,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:28,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-26 19:21:28,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:28,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:21:28,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:28,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:21:28,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0