/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/loops-crafted-1/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:48:08,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:48:08,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:48:08,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:48:08,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:48:08,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:48:08,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:48:08,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:48:08,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:48:08,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:48:08,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:48:08,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:48:08,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:48:08,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:48:08,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:48:08,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:48:08,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:48:08,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:48:08,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:48:08,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:48:08,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:48:08,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:48:09,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:48:09,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:48:09,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:48:09,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:48:09,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:48:09,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:48:09,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:48:09,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:48:09,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:48:09,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:48:09,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:48:09,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:48:09,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:48:09,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:48:09,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:48:09,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:48:09,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:48:09,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:48:09,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:48:09,024 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 [2020-10-27 01:48:09,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:48:09,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:48:09,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:48:09,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:48:09,088 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:48:09,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:48:09,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:48:09,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:48:09,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:48:09,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:48:09,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:48:09,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:48:09,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:48:09,091 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:48:09,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:48:09,091 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:48:09,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:48:09,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:48:09,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:48:09,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:48:09,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:48:09,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:48:09,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:48:09,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:48:09,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:48:09,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:48:09,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:48:09,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:48:09,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:48:09,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:48:09,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:48:09,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:48:09,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:48:09,554 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:48:09,557 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:48:09,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-27 01:48:09,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04776ac20/1b1102a5cc61495b9d9f0eb2a0f8e7fa/FLAG5caf679b3 [2020-10-27 01:48:10,323 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:48:10,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-27 01:48:10,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04776ac20/1b1102a5cc61495b9d9f0eb2a0f8e7fa/FLAG5caf679b3 [2020-10-27 01:48:10,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04776ac20/1b1102a5cc61495b9d9f0eb2a0f8e7fa [2020-10-27 01:48:10,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:48:10,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:48:10,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:48:10,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:48:10,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:48:10,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:48:10" (1/1) ... [2020-10-27 01:48:10,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c121fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10, skipping insertion in model container [2020-10-27 01:48:10,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:48:10" (1/1) ... [2020-10-27 01:48:10,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:48:10,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:48:10,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:48:10,886 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:48:10,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:48:10,916 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:48:10,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10 WrapperNode [2020-10-27 01:48:10,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:48:10,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:48:10,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:48:10,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:48:10,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10" (1/1) ... [2020-10-27 01:48:10,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10" (1/1) ... [2020-10-27 01:48:10,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10" (1/1) ... [2020-10-27 01:48:10,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10" (1/1) ... [2020-10-27 01:48:10,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10" (1/1) ... [2020-10-27 01:48:10,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10" (1/1) ... [2020-10-27 01:48:10,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10" (1/1) ... [2020-10-27 01:48:10,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:48:10,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:48:10,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:48:10,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:48:10,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10" (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 [2020-10-27 01:48:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:48:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:48:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:48:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:48:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:48:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:48:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:48:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:48:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:48:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:48:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:48:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:48:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:48:11,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:48:11,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:48:11,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:48:11,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:48:11,286 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:48:11,286 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:48:11,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:48:11 BoogieIcfgContainer [2020-10-27 01:48:11,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:48:11,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:48:11,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:48:11,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:48:11,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:48:10" (1/3) ... [2020-10-27 01:48:11,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f08cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:48:11, skipping insertion in model container [2020-10-27 01:48:11,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:10" (2/3) ... [2020-10-27 01:48:11,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f08cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:48:11, skipping insertion in model container [2020-10-27 01:48:11,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:48:11" (3/3) ... [2020-10-27 01:48:11,298 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2020-10-27 01:48:11,312 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:48:11,317 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:48:11,333 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:48:11,367 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:48:11,367 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:48:11,367 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:48:11,368 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:48:11,368 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:48:11,368 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:48:11,368 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:48:11,368 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:48:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-27 01:48:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:48:11,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:11,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:11,401 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:11,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1347720711, now seen corresponding path program 1 times [2020-10-27 01:48:11,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:11,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816768518] [2020-10-27 01:48:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:11,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:11,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:11,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:48:11,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:11,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 01:48:11,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:11,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:11,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:11,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:11,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:48:12,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:12,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:12,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:12,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:12,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 01:48:12,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:12,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:12,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816768518] [2020-10-27 01:48:12,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:48:12,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:48:12,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000993190] [2020-10-27 01:48:12,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:48:12,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:48:12,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:48:12,076 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-27 01:48:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:12,143 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-27 01:48:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:48:12,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:48:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:12,154 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:48:12,154 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:48:12,158 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 [2020-10-27 01:48:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:48:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:48:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:48:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-27 01:48:12,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-27 01:48:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:12,204 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-27 01:48:12,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:48:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-27 01:48:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:48:12,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:12,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:12,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:48:12,206 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1061429201, now seen corresponding path program 1 times [2020-10-27 01:48:12,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:12,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235037441] [2020-10-27 01:48:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:12,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:12,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:48:12,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:12,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 01:48:12,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:48:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:48:12,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:48:12,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:12,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:12,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:12,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 01:48:12,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:12,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:12,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:12,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:12,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:48:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235037441] [2020-10-27 01:48:12,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:48:12,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:48:12,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482196184] [2020-10-27 01:48:12,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:48:12,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:48:12,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:48:12,532 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-27 01:48:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:12,624 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-27 01:48:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:48:12,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:48:12,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:12,626 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:48:12,626 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:48:12,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:48:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:48:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:48:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:48:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 01:48:12,636 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 01:48:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:12,636 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 01:48:12,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:48:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 01:48:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:48:12,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:12,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:12,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:48:12,638 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:12,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:12,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1101414388, now seen corresponding path program 1 times [2020-10-27 01:48:12,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:12,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268706551] [2020-10-27 01:48:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:12,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:12,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:48:12,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:12,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 01:48:12,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:12,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:48:12,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:48:12,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:48:12,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:12,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:12,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:12,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:12,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:12,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:48:12,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:12,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:12,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:12,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:12,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:12,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268706551] [2020-10-27 01:48:12,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:48:12,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:48:12,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058781613] [2020-10-27 01:48:12,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:48:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:12,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:48:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:48:12,923 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 01:48:13,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:13,012 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 01:48:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:48:13,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 01:48:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:13,014 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:48:13,014 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:48:13,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:48:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:48:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 01:48:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:48:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 01:48:13,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-27 01:48:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:13,023 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 01:48:13,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:48:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 01:48:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:48:13,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:13,024 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:13,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:48:13,025 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:13,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1647486503, now seen corresponding path program 1 times [2020-10-27 01:48:13,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:13,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548032437] [2020-10-27 01:48:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:13,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:13,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:48:13,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:13,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 01:48:13,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:13,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:48:13,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:13,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:48:13,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:48:13,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:13,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:13,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:13,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:13,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:13,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:13,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:13,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:13,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548032437] [2020-10-27 01:48:13,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:13,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:48:13,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625687682] [2020-10-27 01:48:13,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:48:13,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:13,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:48:13,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:48:13,360 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 01:48:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:13,473 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-27 01:48:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:48:13,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:48:13,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:13,475 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:48:13,475 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:48:13,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:48:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:48:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:48:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:48:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 01:48:13,482 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-27 01:48:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:13,483 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 01:48:13,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:48:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 01:48:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:48:13,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:13,484 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:13,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:48:13,484 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1678553212, now seen corresponding path program 2 times [2020-10-27 01:48:13,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:13,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569450310] [2020-10-27 01:48:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:13,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:13,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:48:13,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:13,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 01:48:13,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:48:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:13,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:48:13,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:13,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:13,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:13,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:13,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:13,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:13,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:13,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:13,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569450310] [2020-10-27 01:48:13,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:13,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:48:13,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472032971] [2020-10-27 01:48:13,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:48:13,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:13,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:48:13,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:48:13,730 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-27 01:48:13,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:13,905 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 01:48:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:48:13,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:48:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:13,906 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:48:13,906 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:48:13,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:48:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:48:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:48:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:48:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 01:48:13,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-27 01:48:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:13,914 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 01:48:13,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:48:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 01:48:13,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:48:13,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:13,915 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:13,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:48:13,916 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:13,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:13,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1747916193, now seen corresponding path program 3 times [2020-10-27 01:48:13,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:13,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152423845] [2020-10-27 01:48:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:13,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:14,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:48:14,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:14,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-27 01:48:14,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:14,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:48:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:48:14,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:14,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:14,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:14,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:14,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:14,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:48:14,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:14,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152423845] [2020-10-27 01:48:14,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:14,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:48:14,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764060396] [2020-10-27 01:48:14,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:48:14,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:48:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:48:14,364 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-27 01:48:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:14,569 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-27 01:48:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:48:14,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 01:48:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:14,570 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:48:14,571 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:48:14,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:48:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:48:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:48:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:48:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 01:48:14,578 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-27 01:48:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:14,578 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 01:48:14,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:48:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 01:48:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:48:14,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:14,579 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:14,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:48:14,580 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash -345098366, now seen corresponding path program 4 times [2020-10-27 01:48:14,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:14,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762141628] [2020-10-27 01:48:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:14,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:14,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:48:14,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:14,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 01:48:14,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:14,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:48:14,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:14,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:48:14,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:14,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:14,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:14,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:14,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:14,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:14,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:14,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:14,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:14,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:14,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:14,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762141628] [2020-10-27 01:48:14,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:14,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:48:14,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514101957] [2020-10-27 01:48:14,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:48:14,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:14,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:48:14,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:48:14,929 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-27 01:48:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:15,216 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-27 01:48:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:48:15,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:48:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:15,217 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:48:15,217 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:48:15,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:48:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:48:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:48:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:48:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 01:48:15,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-27 01:48:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:15,231 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 01:48:15,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:48:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 01:48:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:48:15,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:15,233 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:15,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:48:15,234 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:15,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:15,234 INFO L82 PathProgramCache]: Analyzing trace with hash -856897563, now seen corresponding path program 5 times [2020-10-27 01:48:15,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:15,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137201336] [2020-10-27 01:48:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:15,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:15,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:15,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:15,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:48:15,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:15,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 01:48:15,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:48:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:48:15,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:15,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:15,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:15,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:15,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:15,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:15,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:15,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:15,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:15,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:15,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:15,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:15,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137201336] [2020-10-27 01:48:15,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:15,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:48:15,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95903257] [2020-10-27 01:48:15,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:48:15,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:15,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:48:15,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:48:15,695 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-27 01:48:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:16,029 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 01:48:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:48:16,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:48:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:16,031 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:48:16,031 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:48:16,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:48:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:48:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 01:48:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:48:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-27 01:48:16,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-27 01:48:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:16,038 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-27 01:48:16,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:48:16,039 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-27 01:48:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:48:16,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:16,040 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:16,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:48:16,040 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1225313160, now seen corresponding path program 6 times [2020-10-27 01:48:16,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:16,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101869470] [2020-10-27 01:48:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:16,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:16,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:16,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:16,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:48:16,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:16,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-27 01:48:16,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:48:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:48:16,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:16,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:16,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:16,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:16,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:16,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:16,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:48:16,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:16,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:16,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:16,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:16,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:16,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101869470] [2020-10-27 01:48:16,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:16,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:48:16,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381392191] [2020-10-27 01:48:16,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:48:16,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:48:16,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:48:16,504 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-10-27 01:48:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:16,901 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 01:48:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:48:16,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:48:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:16,903 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:48:16,903 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:48:16,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:48:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:48:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:48:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 01:48:16,916 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-27 01:48:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:16,918 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 01:48:16,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:48:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 01:48:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:48:16,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:16,920 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:16,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:48:16,920 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash 775058027, now seen corresponding path program 7 times [2020-10-27 01:48:16,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:16,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112008744] [2020-10-27 01:48:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:16,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:48:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-27 01:48:17,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:48:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:48:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:17,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:17,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:17,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:17,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:17,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:17,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:48:17,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:17,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:17,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:17,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:17,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112008744] [2020-10-27 01:48:17,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:17,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:48:17,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306457989] [2020-10-27 01:48:17,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:48:17,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:48:17,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:48:17,462 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-27 01:48:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:17,968 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 01:48:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:48:17,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 01:48:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:17,970 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:48:17,970 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:48:17,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:48:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:48:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:48:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:48:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 01:48:17,981 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-27 01:48:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:17,981 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 01:48:17,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:48:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 01:48:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:48:17,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:17,983 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:17,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:48:17,983 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:17,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:17,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1871572110, now seen corresponding path program 8 times [2020-10-27 01:48:17,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:17,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316311046] [2020-10-27 01:48:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:18,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:18,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:18,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:18,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:48:18,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:18,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-27 01:48:18,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:48:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:48:18,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:18,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:18,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:18,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:18,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:18,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:18,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:18,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:18,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:18,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:18,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:18,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316311046] [2020-10-27 01:48:18,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:18,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:48:18,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370751641] [2020-10-27 01:48:18,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:48:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:48:18,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:48:18,525 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-27 01:48:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:19,130 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-27 01:48:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:48:19,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:48:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:19,132 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:48:19,132 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:48:19,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:48:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:48:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:48:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:48:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-27 01:48:19,151 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-27 01:48:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:19,151 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-27 01:48:19,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:48:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-27 01:48:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:48:19,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:19,152 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:19,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:48:19,153 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:19,156 INFO L82 PathProgramCache]: Analyzing trace with hash -940348943, now seen corresponding path program 9 times [2020-10-27 01:48:19,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:19,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160721405] [2020-10-27 01:48:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:19,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:19,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:48:19,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:19,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-27 01:48:19,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:19,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:19,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:19,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:48:19,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:19,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:19,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:19,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:19,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:19,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:19,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:19,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:19,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160721405] [2020-10-27 01:48:19,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:19,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:48:19,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378284780] [2020-10-27 01:48:19,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:48:19,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:19,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:48:19,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:48:19,717 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-27 01:48:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:20,286 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-27 01:48:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:48:20,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 01:48:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:20,288 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:48:20,288 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:48:20,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:48:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:48:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:48:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:48:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-27 01:48:20,298 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-27 01:48:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:20,299 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-27 01:48:20,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:48:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-27 01:48:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:48:20,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:20,300 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:20,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:48:20,300 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1662051692, now seen corresponding path program 10 times [2020-10-27 01:48:20,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:20,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302529103] [2020-10-27 01:48:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:20,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:20,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:20,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:20,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:48:20,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:20,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-27 01:48:20,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:48:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:48:20,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:20,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:20,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:20,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:20,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:20,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:20,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:20,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:20,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:20,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:20,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:20,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302529103] [2020-10-27 01:48:20,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:20,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:48:20,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223864710] [2020-10-27 01:48:20,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:48:20,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:20,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:48:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:48:20,962 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-10-27 01:48:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:21,700 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-27 01:48:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:48:21,701 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 01:48:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:21,702 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:48:21,703 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:48:21,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:48:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:48:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:48:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:48:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 01:48:21,712 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-27 01:48:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:21,713 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 01:48:21,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:48:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 01:48:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:48:21,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:21,714 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:21,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:48:21,714 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:21,715 INFO L82 PathProgramCache]: Analyzing trace with hash 566308471, now seen corresponding path program 11 times [2020-10-27 01:48:21,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:21,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945243918] [2020-10-27 01:48:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:21,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:21,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:22,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:22,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:48:22,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:22,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-27 01:48:22,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:48:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:48:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:22,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:22,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:22,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:22,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:22,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:22,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:48:22,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:22,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:22,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:22,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:22,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:22,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945243918] [2020-10-27 01:48:22,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:22,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:48:22,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563824090] [2020-10-27 01:48:22,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:48:22,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:22,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:48:22,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:48:22,517 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-10-27 01:48:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:23,346 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-27 01:48:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:48:23,347 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 01:48:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:23,349 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:48:23,349 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:48:23,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:48:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:48:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:48:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:48:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 01:48:23,361 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-27 01:48:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:23,361 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 01:48:23,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:48:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 01:48:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:48:23,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:23,363 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:23,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:48:23,363 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:23,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1168255590, now seen corresponding path program 12 times [2020-10-27 01:48:23,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:23,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176998937] [2020-10-27 01:48:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:23,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:23,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:23,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:23,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:48:23,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:23,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-27 01:48:23,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:23,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:48:23,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:23,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:48:23,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:24,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:24,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:24,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:24,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:24,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:24,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:24,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:24,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:24,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:24,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:24,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:24,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176998937] [2020-10-27 01:48:24,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:24,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:48:24,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785377907] [2020-10-27 01:48:24,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:48:24,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:24,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:48:24,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:48:24,177 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-10-27 01:48:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:25,149 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-27 01:48:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:48:25,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 01:48:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:25,151 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:48:25,151 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:48:25,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:48:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:48:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:48:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:48:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 01:48:25,160 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-27 01:48:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:25,161 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 01:48:25,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:48:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 01:48:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:48:25,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:25,162 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:25,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:48:25,162 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1637007363, now seen corresponding path program 13 times [2020-10-27 01:48:25,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:25,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601315207] [2020-10-27 01:48:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:25,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:25,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:48:25,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:25,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-27 01:48:25,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:25,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:48:25,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:25,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:48:25,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:26,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:26,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:26,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:26,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:26,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:26,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:48:26,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:26,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:26,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:26,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601315207] [2020-10-27 01:48:26,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:26,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:48:26,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906665970] [2020-10-27 01:48:26,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:48:26,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:26,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:48:26,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:26,095 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2020-10-27 01:48:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:27,150 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-27 01:48:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:48:27,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-27 01:48:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:27,152 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:48:27,152 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:48:27,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:48:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:48:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:48:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:48:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-27 01:48:27,161 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-27 01:48:27,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:27,162 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-27 01:48:27,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:48:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-27 01:48:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:48:27,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:27,163 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:27,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:48:27,163 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:27,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1135895136, now seen corresponding path program 14 times [2020-10-27 01:48:27,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:27,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817816935] [2020-10-27 01:48:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:27,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:27,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:27,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:27,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:48:27,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:27,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-27 01:48:27,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:27,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:48:27,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:27,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:48:27,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 01:48:28,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:28,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:28,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:28,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:28,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:28,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:48:28,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:28,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:28,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:28,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:28,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:28,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817816935] [2020-10-27 01:48:28,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:28,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:48:28,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944843690] [2020-10-27 01:48:28,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:48:28,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:28,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:48:28,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:48:28,090 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 18 states. [2020-10-27 01:48:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:29,274 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-27 01:48:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:48:29,275 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-27 01:48:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:29,276 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:48:29,276 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:48:29,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:48:29,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:48:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:48:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:48:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-27 01:48:29,285 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-27 01:48:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:29,285 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-27 01:48:29,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:48:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-27 01:48:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:48:29,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:29,287 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:29,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:48:29,287 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:29,288 INFO L82 PathProgramCache]: Analyzing trace with hash -603382141, now seen corresponding path program 15 times [2020-10-27 01:48:29,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:29,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658025607] [2020-10-27 01:48:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:29,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:29,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:30,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:30,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:48:30,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:30,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-27 01:48:30,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:30,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:48:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:48:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:30,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:30,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:30,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:30,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:30,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:30,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:30,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:30,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:30,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:30,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:30,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:30,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658025607] [2020-10-27 01:48:30,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:30,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:48:30,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832191194] [2020-10-27 01:48:30,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:48:30,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:30,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:48:30,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:48:30,409 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-10-27 01:48:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:31,583 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-27 01:48:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:48:31,584 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-27 01:48:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:31,584 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:48:31,584 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:48:31,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:48:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:48:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:48:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:48:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-27 01:48:31,595 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-27 01:48:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:31,595 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-27 01:48:31,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:48:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-27 01:48:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:48:31,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:31,596 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:31,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:48:31,597 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash 40497830, now seen corresponding path program 16 times [2020-10-27 01:48:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:31,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192434794] [2020-10-27 01:48:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:31,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:31,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:32,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:48:32,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:32,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-27 01:48:32,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:32,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:48:32,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:32,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:48:32,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:48:32,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:32,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:32,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:32,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:32,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:32,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:32,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192434794] [2020-10-27 01:48:32,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:32,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:48:32,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792574611] [2020-10-27 01:48:32,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:48:32,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:32,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:48:32,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:48:32,704 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2020-10-27 01:48:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:33,980 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-27 01:48:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:48:33,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-27 01:48:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:33,981 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:48:33,981 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:48:33,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:48:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:48:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:48:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:48:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 01:48:33,991 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-27 01:48:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:33,992 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 01:48:33,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:48:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 01:48:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:48:33,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:33,993 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:33,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:48:33,993 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:33,994 INFO L82 PathProgramCache]: Analyzing trace with hash 333859337, now seen corresponding path program 17 times [2020-10-27 01:48:33,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:33,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018995442] [2020-10-27 01:48:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:34,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:34,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:48:34,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:34,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-27 01:48:34,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:48:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:34,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:48:34,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:35,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:35,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:35,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:35,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:35,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:35,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:35,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:35,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018995442] [2020-10-27 01:48:35,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:35,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:48:35,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463853636] [2020-10-27 01:48:35,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:48:35,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:48:35,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:48:35,048 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 21 states. [2020-10-27 01:48:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:36,614 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-27 01:48:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:48:36,614 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-27 01:48:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:36,615 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:48:36,615 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:48:36,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:48:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:48:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:48:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:48:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-27 01:48:36,624 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-27 01:48:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:36,624 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-27 01:48:36,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:48:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-27 01:48:36,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:48:36,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:36,626 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:36,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:48:36,626 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:36,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1213573972, now seen corresponding path program 18 times [2020-10-27 01:48:36,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:36,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023884830] [2020-10-27 01:48:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:36,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:36,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:37,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:37,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:48:37,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:37,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-27 01:48:37,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:48:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:48:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:38,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:38,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:38,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:38,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:38,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:38,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:38,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:38,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:38,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:38,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:38,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023884830] [2020-10-27 01:48:38,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:38,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:48:38,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688909642] [2020-10-27 01:48:38,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:48:38,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:38,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:48:38,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:48:38,066 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 22 states. [2020-10-27 01:48:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:39,538 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-27 01:48:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:48:39,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-27 01:48:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:39,540 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:48:39,540 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:48:39,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:48:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:48:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:48:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:48:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 01:48:39,550 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-27 01:48:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:39,550 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 01:48:39,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:48:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 01:48:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:48:39,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:39,551 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:39,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:48:39,551 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:39,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2056667791, now seen corresponding path program 19 times [2020-10-27 01:48:39,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:39,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861069569] [2020-10-27 01:48:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:39,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:39,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:40,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:40,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:48:40,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:40,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-27 01:48:40,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:40,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:48:40,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:40,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:48:40,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:41,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:41,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:41,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:41,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:41,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:41,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:48:41,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:41,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:41,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:41,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:41,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:41,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861069569] [2020-10-27 01:48:41,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:41,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:48:41,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353690408] [2020-10-27 01:48:41,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:48:41,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:41,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:48:41,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:48:41,112 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2020-10-27 01:48:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:42,773 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-27 01:48:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:48:42,775 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-27 01:48:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:42,776 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:48:42,776 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:48:42,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:48:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:48:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:48:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:48:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-27 01:48:42,795 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-27 01:48:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:42,796 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-27 01:48:42,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:48:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-27 01:48:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:48:42,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:42,798 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:42,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:48:42,799 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:42,799 INFO L82 PathProgramCache]: Analyzing trace with hash 842941362, now seen corresponding path program 20 times [2020-10-27 01:48:42,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:42,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496543413] [2020-10-27 01:48:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:42,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:42,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:43,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:43,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:48:43,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:43,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-27 01:48:43,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:43,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:48:43,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:43,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:48:43,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:44,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:44,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:44,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:44,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:44,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:44,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:44,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:44,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496543413] [2020-10-27 01:48:44,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:44,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:48:44,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428887741] [2020-10-27 01:48:44,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:48:44,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:48:44,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:48:44,163 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 24 states. [2020-10-27 01:48:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:46,057 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-27 01:48:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:48:46,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-27 01:48:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:46,058 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:48:46,058 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:48:46,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:48:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:48:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:48:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:48:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 01:48:46,067 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-27 01:48:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:46,067 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 01:48:46,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:48:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 01:48:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:48:46,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:46,068 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:46,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:48:46,068 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1612019691, now seen corresponding path program 21 times [2020-10-27 01:48:46,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:46,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437000143] [2020-10-27 01:48:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:46,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:46,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:47,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:48:47,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:47,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:47,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:47,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:47,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:47,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:47,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:47,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:47,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437000143] [2020-10-27 01:48:47,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:47,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:48:47,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016736441] [2020-10-27 01:48:47,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:48:47,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:47,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:48:47,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:48:47,673 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 25 states. [2020-10-27 01:48:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:49,869 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-27 01:48:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:48:49,869 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-27 01:48:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:49,870 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:48:49,871 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:48:49,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:48:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:48:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:48:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:48:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-27 01:48:49,880 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-27 01:48:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:49,880 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-27 01:48:49,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:48:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-27 01:48:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:48:49,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:49,881 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:49,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:48:49,882 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:49,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1402421176, now seen corresponding path program 22 times [2020-10-27 01:48:49,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:49,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589276562] [2020-10-27 01:48:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:50,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:50,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:50,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:48:50,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:50,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-27 01:48:50,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:48:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:48:50,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:51,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:51,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:51,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:51,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:51,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:51,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:51,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:51,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:51,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589276562] [2020-10-27 01:48:51,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:51,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:48:51,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156329557] [2020-10-27 01:48:51,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:48:51,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:51,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:48:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:48:51,617 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 26 states. [2020-10-27 01:48:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:53,753 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-27 01:48:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:48:53,754 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-27 01:48:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:53,755 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:48:53,755 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:48:53,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:48:53,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:48:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:48:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:48:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-27 01:48:53,763 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-27 01:48:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:53,764 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-27 01:48:53,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:48:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-27 01:48:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:48:53,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:53,765 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:53,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:48:53,765 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:53,765 INFO L82 PathProgramCache]: Analyzing trace with hash -822830437, now seen corresponding path program 23 times [2020-10-27 01:48:53,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:53,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613878500] [2020-10-27 01:48:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:53,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:54,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:54,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:54,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:48:54,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:54,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-27 01:48:54,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:54,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:48:54,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:54,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:48:54,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:55,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:55,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:55,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:55,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:55,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:55,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:55,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:55,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:55,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613878500] [2020-10-27 01:48:55,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:55,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:48:55,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212773388] [2020-10-27 01:48:55,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:48:55,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:55,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:48:55,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:48:55,573 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 27 states. [2020-10-27 01:48:58,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:58,084 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-27 01:48:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:48:58,085 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-27 01:48:58,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:58,086 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:48:58,086 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:48:58,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:48:58,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:48:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 01:48:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:48:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-27 01:48:58,094 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-27 01:48:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:58,094 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-27 01:48:58,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:48:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-27 01:48:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:48:58,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:58,095 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:58,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:48:58,096 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:58,096 INFO L82 PathProgramCache]: Analyzing trace with hash -395917122, now seen corresponding path program 24 times [2020-10-27 01:48:58,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:58,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996740733] [2020-10-27 01:48:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:58,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:58,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:59,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:59,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:48:59,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:59,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-27 01:48:59,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:48:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:48:59,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:00,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:00,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:00,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:00,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:00,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:00,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:00,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:00,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:00,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:00,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:00,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996740733] [2020-10-27 01:49:00,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:00,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:49:00,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481607074] [2020-10-27 01:49:00,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:49:00,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:00,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:49:00,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:49:00,050 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 28 states. [2020-10-27 01:49:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:02,726 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-27 01:49:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:49:02,727 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-27 01:49:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:02,728 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:49:02,728 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:49:02,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:49:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:49:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-27 01:49:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:49:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-27 01:49:02,736 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-27 01:49:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:02,736 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-27 01:49:02,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:49:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-27 01:49:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:49:02,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:02,737 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:02,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:49:02,737 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:02,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1845885473, now seen corresponding path program 25 times [2020-10-27 01:49:02,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:02,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760461449] [2020-10-27 01:49:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:02,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:02,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:04,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:04,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:49:04,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:04,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294 [2020-10-27 01:49:04,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:04,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:49:04,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:04,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:49:04,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:04,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:04,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:04,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:04,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:04,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:04,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:04,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:04,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:04,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760461449] [2020-10-27 01:49:04,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:04,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:49:04,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519287200] [2020-10-27 01:49:04,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:49:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:49:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:49:04,992 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 29 states. [2020-10-27 01:49:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:07,720 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-27 01:49:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:49:07,721 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-27 01:49:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:07,722 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:49:07,722 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:49:07,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:49:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:49:07,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 01:49:07,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:49:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 01:49:07,731 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-27 01:49:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:07,732 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 01:49:07,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:49:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 01:49:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:49:07,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:07,733 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:07,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:49:07,733 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:07,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:07,733 INFO L82 PathProgramCache]: Analyzing trace with hash 144596676, now seen corresponding path program 26 times [2020-10-27 01:49:07,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:07,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233711716] [2020-10-27 01:49:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:07,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:07,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:08,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:08,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:49:08,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:08,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-27 01:49:08,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:08,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:49:08,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:08,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:49:08,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:09,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:09,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:09,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:09,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:09,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:09,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:09,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:09,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:09,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:09,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:09,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:09,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233711716] [2020-10-27 01:49:09,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:09,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:49:09,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661454623] [2020-10-27 01:49:09,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:49:09,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:09,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:49:09,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:49:09,565 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 30 states. [2020-10-27 01:49:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:12,532 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-27 01:49:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:49:12,533 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-27 01:49:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:12,534 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:49:12,534 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:49:12,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:49:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:49:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-27 01:49:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:49:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-27 01:49:12,543 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-27 01:49:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:12,544 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-27 01:49:12,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:49:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-27 01:49:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:49:12,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:12,545 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:12,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:49:12,545 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1588602535, now seen corresponding path program 27 times [2020-10-27 01:49:12,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:12,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567666296] [2020-10-27 01:49:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:12,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:13,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:49:13,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:13,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-27 01:49:13,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:49:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:49:13,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:14,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:14,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:14,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:14,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:14,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:14,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:14,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567666296] [2020-10-27 01:49:14,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:14,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:49:14,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076161573] [2020-10-27 01:49:14,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:49:14,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:49:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:49:14,444 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 31 states. [2020-10-27 01:49:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:17,537 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-27 01:49:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:49:17,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-27 01:49:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:17,538 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:49:17,538 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:49:17,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:49:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:49:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 01:49:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:49:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-27 01:49:17,546 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-27 01:49:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:17,547 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-27 01:49:17,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:49:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-27 01:49:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:49:17,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:17,548 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:17,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:49:17,548 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:17,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2003796426, now seen corresponding path program 28 times [2020-10-27 01:49:17,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:17,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016035229] [2020-10-27 01:49:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:17,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:17,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:18,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:49:18,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:18,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-27 01:49:18,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:18,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:49:18,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:18,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:49:18,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:19,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:19,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:19,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:19,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:19,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:19,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:19,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:19,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:19,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:19,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:19,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016035229] [2020-10-27 01:49:19,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:19,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:49:19,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686278584] [2020-10-27 01:49:19,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:49:19,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:49:19,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:49:19,324 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 32 states. [2020-10-27 01:49:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:22,665 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-27 01:49:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:49:22,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-27 01:49:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:22,667 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:49:22,667 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:49:22,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:49:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:49:22,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 01:49:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:49:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-27 01:49:22,676 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-27 01:49:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:22,676 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-27 01:49:22,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:49:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-27 01:49:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:49:22,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:22,677 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:22,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:49:22,677 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:22,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1573167149, now seen corresponding path program 29 times [2020-10-27 01:49:22,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:22,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399535137] [2020-10-27 01:49:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:22,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:22,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:23,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:23,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:49:23,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:23,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-27 01:49:23,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:49:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:49:23,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:24,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:24,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:24,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:24,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:24,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:24,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:24,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:24,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:24,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:24,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:24,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399535137] [2020-10-27 01:49:24,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:24,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:49:24,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723818071] [2020-10-27 01:49:24,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:49:24,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:24,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:49:24,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:49:24,808 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 33 states. [2020-10-27 01:49:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:28,458 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-10-27 01:49:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:49:28,459 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-27 01:49:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:28,461 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:49:28,461 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:49:28,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:49:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:49:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-27 01:49:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:49:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-27 01:49:28,471 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-27 01:49:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:28,471 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-27 01:49:28,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:49:28,471 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-27 01:49:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 01:49:28,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:28,472 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:28,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:49:28,472 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash 55292368, now seen corresponding path program 30 times [2020-10-27 01:49:28,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:28,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217616492] [2020-10-27 01:49:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:28,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:28,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:29,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:49:29,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:29,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-27 01:49:29,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:29,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:49:29,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:29,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:49:29,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:30,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:30,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:30,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:30,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:30,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:30,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:30,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:30,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:30,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:30,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:30,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:30,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217616492] [2020-10-27 01:49:30,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:30,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:49:30,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373566769] [2020-10-27 01:49:30,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:49:30,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:49:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:49:30,613 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 34 states. [2020-10-27 01:49:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:34,333 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-27 01:49:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:49:34,334 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-27 01:49:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:34,335 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:49:34,335 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:49:34,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:49:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:49:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-27 01:49:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:49:34,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 01:49:34,345 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-27 01:49:34,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:34,345 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 01:49:34,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:49:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 01:49:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:49:34,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:34,346 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:34,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:49:34,346 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1666508467, now seen corresponding path program 31 times [2020-10-27 01:49:34,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:34,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320368192] [2020-10-27 01:49:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:34,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:34,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:36,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:36,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 01:49:36,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:36,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1638 [2020-10-27 01:49:36,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:36,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:49:36,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:36,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:49:36,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:37,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:37,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:37,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:37,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:37,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:37,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:37,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:37,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:37,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:37,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:37,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:37,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320368192] [2020-10-27 01:49:37,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:37,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:49:37,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287509994] [2020-10-27 01:49:37,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:49:37,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:37,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:49:37,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:49:37,073 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 35 states. [2020-10-27 01:49:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:41,023 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-10-27 01:49:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:49:41,023 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-27 01:49:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:41,024 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:49:41,025 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:49:41,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:49:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:49:41,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-27 01:49:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:49:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-27 01:49:41,034 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-27 01:49:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:41,034 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-27 01:49:41,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:49:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-27 01:49:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:49:41,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:41,035 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:41,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:49:41,036 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash -438014250, now seen corresponding path program 32 times [2020-10-27 01:49:41,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:41,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366249437] [2020-10-27 01:49:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:41,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:41,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:42,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:42,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:49:42,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:42,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-27 01:49:42,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:42,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:49:42,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:42,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 01:49:42,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:43,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:43,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:43,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366249437] [2020-10-27 01:49:43,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:43,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:49:43,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869189187] [2020-10-27 01:49:43,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:49:43,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:43,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:49:43,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:49:43,173 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 36 states. [2020-10-27 01:49:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:47,284 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-27 01:49:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:49:47,285 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-27 01:49:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:47,286 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:49:47,286 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:49:47,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:49:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:49:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 01:49:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:49:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-27 01:49:47,295 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-27 01:49:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:47,296 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-27 01:49:47,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:49:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-27 01:49:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:49:47,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:47,297 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:47,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:49:47,297 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash 45251129, now seen corresponding path program 33 times [2020-10-27 01:49:47,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:47,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572937461] [2020-10-27 01:49:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:47,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:47,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:48,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:48,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:49:48,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:48,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1206 [2020-10-27 01:49:48,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:49:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 01:49:48,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:49,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:49,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:49,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:49,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:49,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:49,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:49,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:49,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:49,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572937461] [2020-10-27 01:49:49,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:49,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:49:49,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383512785] [2020-10-27 01:49:49,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:49:49,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:49,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:49:49,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:49:49,841 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 37 states. [2020-10-27 01:49:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:54,287 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-27 01:49:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:49:54,287 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-27 01:49:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:54,288 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:49:54,289 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:49:54,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:49:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:49:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 01:49:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:49:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-27 01:49:54,296 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-27 01:49:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:54,296 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-27 01:49:54,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:49:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-27 01:49:54,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 01:49:54,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:54,297 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:54,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:49:54,297 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash 606812380, now seen corresponding path program 34 times [2020-10-27 01:49:54,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:54,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238467786] [2020-10-27 01:49:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:54,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:54,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:55,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:55,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 01:49:55,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:55,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1254 [2020-10-27 01:49:55,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:49:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 01:49:55,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:56,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:56,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:56,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:56,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:56,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:56,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:56,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:56,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:56,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:56,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238467786] [2020-10-27 01:49:56,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:56,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:49:56,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486938117] [2020-10-27 01:49:56,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:49:56,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:49:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:49:56,951 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 38 states. [2020-10-27 01:50:01,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:01,631 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-27 01:50:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:50:01,632 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-27 01:50:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:01,633 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:50:01,633 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:50:01,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:50:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:50:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-27 01:50:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:50:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-27 01:50:01,644 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-27 01:50:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:01,644 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-27 01:50:01,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:50:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-27 01:50:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:50:01,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:01,645 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:01,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:50:01,645 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:01,646 INFO L82 PathProgramCache]: Analyzing trace with hash -898704705, now seen corresponding path program 35 times [2020-10-27 01:50:01,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:01,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44695891] [2020-10-27 01:50:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:01,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:01,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:03,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:03,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:50:03,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:03,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1763 [2020-10-27 01:50:03,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:50:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 01:50:03,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:04,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:04,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:04,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:04,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:04,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:04,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:04,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:04,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:04,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:04,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:04,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:04,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44695891] [2020-10-27 01:50:04,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:04,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:50:04,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900519413] [2020-10-27 01:50:04,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:50:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:50:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:50:04,900 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 39 states. [2020-10-27 01:50:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:09,957 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-27 01:50:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:50:09,958 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-27 01:50:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:09,959 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:50:09,959 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:50:09,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:50:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:50:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-27 01:50:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:50:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 01:50:09,968 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-27 01:50:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:09,968 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 01:50:09,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:50:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 01:50:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:50:09,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:09,969 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:09,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:50:09,969 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:09,970 INFO L82 PathProgramCache]: Analyzing trace with hash -296644638, now seen corresponding path program 36 times [2020-10-27 01:50:09,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:09,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621006668] [2020-10-27 01:50:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:09,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:10,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:11,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:11,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 01:50:11,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:11,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1741 [2020-10-27 01:50:11,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:11,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:50:11,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:11,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 01:50:11,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:13,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:13,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:13,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:13,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:13,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:13,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:13,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:13,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:13,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:13,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:13,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621006668] [2020-10-27 01:50:13,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:13,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:50:13,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946505832] [2020-10-27 01:50:13,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:50:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:13,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:50:13,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:50:13,292 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 40 states. [2020-10-27 01:50:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:18,555 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-27 01:50:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:50:18,556 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-27 01:50:18,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:18,557 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:50:18,557 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:50:18,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:50:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:50:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-27 01:50:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:50:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-27 01:50:18,567 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-10-27 01:50:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:18,568 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-27 01:50:18,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:50:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-27 01:50:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:50:18,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:18,568 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:18,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:50:18,569 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1537505211, now seen corresponding path program 37 times [2020-10-27 01:50:18,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:18,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316241561] [2020-10-27 01:50:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:18,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:20,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:20,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:50:20,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:20,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1650 [2020-10-27 01:50:20,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:50:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 01:50:20,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:21,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:21,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:21,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:21,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:21,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:21,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:21,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:21,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:21,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:21,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:21,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:21,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316241561] [2020-10-27 01:50:21,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:21,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:50:21,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233344695] [2020-10-27 01:50:21,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:50:21,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:21,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:50:21,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:50:21,854 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 41 states. [2020-10-27 01:50:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:27,160 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-27 01:50:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:50:27,161 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-27 01:50:27,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:27,162 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:50:27,162 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:50:27,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:50:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:50:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-27 01:50:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:50:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-27 01:50:27,171 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-10-27 01:50:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:27,171 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-27 01:50:27,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:50:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-27 01:50:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:50:27,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:27,172 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:27,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:50:27,172 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash -3607576, now seen corresponding path program 38 times [2020-10-27 01:50:27,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:27,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208234738] [2020-10-27 01:50:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:27,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:28,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:28,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:28,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:50:28,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:28,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1717 [2020-10-27 01:50:28,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:50:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 01:50:28,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:30,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:30,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:30,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:30,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:30,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:30,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:50:30,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:30,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:30,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208234738] [2020-10-27 01:50:30,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:30,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:50:30,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062152693] [2020-10-27 01:50:30,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:50:30,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:30,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:50:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:50:30,575 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 42 states. [2020-10-27 01:50:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:36,286 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-10-27 01:50:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:50:36,286 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-27 01:50:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:36,288 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:50:36,288 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:50:36,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:50:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:50:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-27 01:50:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:50:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-27 01:50:36,302 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-27 01:50:36,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:36,302 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-27 01:50:36,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:50:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-27 01:50:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:50:36,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:36,303 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:36,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:50:36,303 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:36,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:36,304 INFO L82 PathProgramCache]: Analyzing trace with hash 898237131, now seen corresponding path program 39 times [2020-10-27 01:50:36,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:36,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500860621] [2020-10-27 01:50:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:36,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:37,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:38,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:38,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:50:38,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:38,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2365 [2020-10-27 01:50:38,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:38,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:50:38,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:38,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 01:50:38,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:40,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:40,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:40,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:40,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:40,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:40,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:50:40,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:40,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:40,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:40,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:40,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500860621] [2020-10-27 01:50:40,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:40,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:50:40,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468178618] [2020-10-27 01:50:40,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:50:40,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:40,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:50:40,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:50:40,447 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 43 states. [2020-10-27 01:50:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:46,361 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-27 01:50:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:50:46,362 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-27 01:50:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:46,363 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:50:46,363 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:50:46,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:50:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:50:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-27 01:50:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:50:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-27 01:50:46,375 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-10-27 01:50:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:46,375 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-27 01:50:46,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:50:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-27 01:50:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 01:50:46,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:46,376 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:46,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:50:46,376 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:46,377 INFO L82 PathProgramCache]: Analyzing trace with hash -12393234, now seen corresponding path program 40 times [2020-10-27 01:50:46,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:46,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950338654] [2020-10-27 01:50:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:47,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:48,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:48,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 01:50:48,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:48,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1897 [2020-10-27 01:50:48,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:48,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:50:48,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:48,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 01:50:48,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:50,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:50,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:50,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:50,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:50,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:50,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:50,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:50,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:50,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950338654] [2020-10-27 01:50:50,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:50,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:50:50,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075599019] [2020-10-27 01:50:50,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:50:50,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:50:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:50:50,124 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 44 states. [2020-10-27 01:50:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:56,258 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-27 01:50:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:50:56,265 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-27 01:50:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:56,266 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:50:56,266 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:50:56,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:50:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:50:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-27 01:50:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:50:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 01:50:56,275 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-10-27 01:50:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:56,276 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 01:50:56,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:50:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 01:50:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:50:56,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:56,277 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:56,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:50:56,277 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1045154385, now seen corresponding path program 41 times [2020-10-27 01:50:56,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:56,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130889084] [2020-10-27 01:50:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:56,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:56,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:58,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:58,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:50:58,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:58,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2357 [2020-10-27 01:50:58,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:58,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:50:58,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:58,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 01:50:58,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:00,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:00,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:00,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:00,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:00,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:00,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:00,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:00,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:00,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130889084] [2020-10-27 01:51:00,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:00,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:51:00,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229287117] [2020-10-27 01:51:00,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:51:00,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:00,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:51:00,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:51:00,573 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 45 states. [2020-10-27 01:51:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:06,971 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-27 01:51:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:51:06,971 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-27 01:51:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:06,973 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:51:06,973 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:51:06,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:51:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:51:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-27 01:51:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:51:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-27 01:51:06,983 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-27 01:51:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:06,984 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-27 01:51:06,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:51:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-27 01:51:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 01:51:06,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:06,984 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:06,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:51:06,985 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash -558832908, now seen corresponding path program 42 times [2020-10-27 01:51:06,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:06,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884618290] [2020-10-27 01:51:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:07,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:07,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:08,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:08,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 01:51:08,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:08,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1876 [2020-10-27 01:51:08,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:08,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:51:08,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:08,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 01:51:08,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:10,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:10,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:10,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:10,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:10,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:10,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:10,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:10,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:10,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:10,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:10,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884618290] [2020-10-27 01:51:10,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:10,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:51:10,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900495099] [2020-10-27 01:51:10,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:51:10,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:10,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:51:10,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:51:10,901 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 46 states. [2020-10-27 01:51:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:17,588 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2020-10-27 01:51:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:51:17,589 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-27 01:51:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:17,590 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:51:17,590 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:51:17,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:51:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:51:17,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-27 01:51:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:51:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-27 01:51:17,598 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-27 01:51:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:17,598 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-27 01:51:17,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:51:17,598 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-27 01:51:17,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 01:51:17,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:17,599 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:17,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:51:17,599 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:17,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:17,600 INFO L82 PathProgramCache]: Analyzing trace with hash -97362217, now seen corresponding path program 43 times [2020-10-27 01:51:17,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:17,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265376394] [2020-10-27 01:51:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:17,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:20,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:20,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 01:51:20,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:20,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2791 [2020-10-27 01:51:20,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:51:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 01:51:20,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:22,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:22,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:22,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:22,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:22,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:22,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:22,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:22,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:22,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:22,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265376394] [2020-10-27 01:51:22,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:22,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:51:22,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844591530] [2020-10-27 01:51:22,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:51:22,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:22,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:51:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:51:22,527 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 47 states. [2020-10-27 01:51:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:29,595 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-27 01:51:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:51:29,596 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-27 01:51:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:29,597 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:51:29,598 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:51:29,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:51:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:51:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-27 01:51:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:51:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-27 01:51:29,608 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2020-10-27 01:51:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:29,608 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-27 01:51:29,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:51:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-27 01:51:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:51:29,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:29,609 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:29,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:51:29,609 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:29,610 INFO L82 PathProgramCache]: Analyzing trace with hash 994340346, now seen corresponding path program 44 times [2020-10-27 01:51:29,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:29,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955538081] [2020-10-27 01:51:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:29,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:31,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:32,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:32,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:51:32,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:32,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2661 [2020-10-27 01:51:32,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:32,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:51:32,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:32,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 01:51:32,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:34,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:34,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:34,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:34,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:34,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:34,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:34,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:34,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:34,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:34,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955538081] [2020-10-27 01:51:34,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:34,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:51:34,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393236491] [2020-10-27 01:51:34,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:51:34,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:51:34,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:51:34,476 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 48 states. [2020-10-27 01:51:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:41,967 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-10-27 01:51:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:51:41,968 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-27 01:51:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:41,969 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:51:41,969 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:51:41,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:51:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:51:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-27 01:51:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:51:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-27 01:51:41,980 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2020-10-27 01:51:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:41,980 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-27 01:51:41,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:51:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-27 01:51:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 01:51:41,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:41,981 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:41,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:51:41,982 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2146484131, now seen corresponding path program 45 times [2020-10-27 01:51:41,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:41,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102727164] [2020-10-27 01:51:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:44,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:44,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 01:51:44,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:44,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2033 [2020-10-27 01:51:44,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:44,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:51:44,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:44,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 01:51:44,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:46,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:46,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:46,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:46,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:46,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:46,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:46,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:46,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:46,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:46,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102727164] [2020-10-27 01:51:46,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:46,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:51:46,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953749384] [2020-10-27 01:51:46,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:51:46,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:46,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:51:46,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:51:46,347 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 49 states. [2020-10-27 01:51:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:54,242 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-27 01:51:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:51:54,243 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-27 01:51:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:54,246 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:51:54,247 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:51:54,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:51:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:51:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-27 01:51:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:51:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-27 01:51:54,258 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2020-10-27 01:51:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:54,258 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-27 01:51:54,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:51:54,258 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-27 01:51:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 01:51:54,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:54,259 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:54,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:51:54,259 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1116797440, now seen corresponding path program 46 times [2020-10-27 01:51:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:54,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961813486] [2020-10-27 01:51:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:56,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:57,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:57,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 01:51:57,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:57,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3345 [2020-10-27 01:51:57,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:57,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:51:57,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:57,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 01:51:57,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0