/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/loopv2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:47:02,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:47:02,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:47:02,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:47:02,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:47:02,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:47:02,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:47:02,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:47:02,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:47:02,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:47:02,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:47:02,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:47:02,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:47:02,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:47:02,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:47:02,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:47:02,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:47:02,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:47:02,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:47:02,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:47:02,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:47:02,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:47:02,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:47:02,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:47:02,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:47:02,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:47:02,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:47:02,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:47:02,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:47:02,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:47:02,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:47:02,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:47:02,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:47:02,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:47:02,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:47:02,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:47:02,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:47:02,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:47:02,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:47:02,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:47:02,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:47:02,967 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 01:47:03,013 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:47:03,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:47:03,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:47:03,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:47:03,019 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:47:03,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:47:03,019 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:47:03,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:47:03,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:47:03,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:47:03,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:47:03,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:47:03,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:47:03,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:47:03,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:47:03,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:47:03,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:47:03,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:47:03,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:47:03,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:47:03,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:47:03,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:47:03,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:47:03,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:47:03,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:47:03,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:47:03,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:47:03,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:47:03,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:47:03,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:47:03,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:47:03,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:47:03,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:47:03,535 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:47:03,535 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:47:03,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c [2020-10-27 01:47:03,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be0b5d6be/6bfd5d38f3d24940adc2c42e1d933a74/FLAGfb7124d99 [2020-10-27 01:47:04,362 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:47:04,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/loopv2.c [2020-10-27 01:47:04,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be0b5d6be/6bfd5d38f3d24940adc2c42e1d933a74/FLAGfb7124d99 [2020-10-27 01:47:04,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be0b5d6be/6bfd5d38f3d24940adc2c42e1d933a74 [2020-10-27 01:47:04,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:47:04,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:47:04,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:47:04,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:47:04,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:47:04,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:47:04" (1/1) ... [2020-10-27 01:47:04,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1732d00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:04, skipping insertion in model container [2020-10-27 01:47:04,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:47:04" (1/1) ... [2020-10-27 01:47:04,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:47:04,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:47:05,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:47:05,080 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:47:05,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:47:05,122 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:47:05,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05 WrapperNode [2020-10-27 01:47:05,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:47:05,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:47:05,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:47:05,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:47:05,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05" (1/1) ... [2020-10-27 01:47:05,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05" (1/1) ... [2020-10-27 01:47:05,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05" (1/1) ... [2020-10-27 01:47:05,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05" (1/1) ... [2020-10-27 01:47:05,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05" (1/1) ... [2020-10-27 01:47:05,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05" (1/1) ... [2020-10-27 01:47:05,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05" (1/1) ... [2020-10-27 01:47:05,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:47:05,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:47:05,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:47:05,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:47:05,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05" (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 01:47:05,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:47:05,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:47:05,274 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:47:05,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:47:05,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:47:05,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:47:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:47:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:47:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:47:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:47:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:47:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:47:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:47:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:47:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:47:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:47:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:47:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:47:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:47:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:47:05,634 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:47:05,634 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:47:05,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:47:05 BoogieIcfgContainer [2020-10-27 01:47:05,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:47:05,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:47:05,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:47:05,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:47:05,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:47:04" (1/3) ... [2020-10-27 01:47:05,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b562c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:47:05, skipping insertion in model container [2020-10-27 01:47:05,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:47:05" (2/3) ... [2020-10-27 01:47:05,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b562c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:47:05, skipping insertion in model container [2020-10-27 01:47:05,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:47:05" (3/3) ... [2020-10-27 01:47:05,646 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv2.c [2020-10-27 01:47:05,658 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:47:05,663 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:47:05,694 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:47:05,720 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:47:05,721 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:47:05,721 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:47:05,721 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:47:05,721 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:47:05,721 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:47:05,722 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:47:05,722 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:47:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 01:47:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:47:05,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:05,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:05,745 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1500402365, now seen corresponding path program 1 times [2020-10-27 01:47:05,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:05,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425790613] [2020-10-27 01:47:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:06,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:06,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:06,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:06,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:47:06,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-27 01:47:06,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:06,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:47:06,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:06,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:47:06,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:47:06,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:06,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:07,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:07,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:07,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:47:07,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:07,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:07,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:07,030 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 01:47:07,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425790613] [2020-10-27 01:47:07,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:47:07,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:47:07,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043082624] [2020-10-27 01:47:07,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:47:07,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:07,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:47:07,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:47:07,066 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 4 states. [2020-10-27 01:47:07,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:07,276 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-27 01:47:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:47:07,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:47:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:07,285 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:47:07,286 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:47:07,289 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 01:47:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:47:07,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:47:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:47:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 01:47:07,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-27 01:47:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:07,334 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 01:47:07,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:47:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 01:47:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:47:07,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:07,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:07,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:47:07,336 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1801503478, now seen corresponding path program 1 times [2020-10-27 01:47:07,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:07,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022067674] [2020-10-27 01:47:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:07,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:47:07,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:07,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-27 01:47:07,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:47:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:47:07,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:07,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:07,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:07,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:07,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:07,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:47:07,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:07,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:07,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022067674] [2020-10-27 01:47:07,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:07,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:47:07,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928284851] [2020-10-27 01:47:07,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:47:07,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:07,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:47:07,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:47:07,788 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-10-27 01:47:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:08,116 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-27 01:47:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:47:08,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:47:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:08,118 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:47:08,119 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:47:08,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:47:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-27 01:47:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:47:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-27 01:47:08,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-10-27 01:47:08,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:08,129 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-27 01:47:08,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:47:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-27 01:47:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:47:08,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:08,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:08,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:47:08,131 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:08,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1217035893, now seen corresponding path program 1 times [2020-10-27 01:47:08,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:08,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099851840] [2020-10-27 01:47:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:08,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:08,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:47:08,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:08,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 01:47:08,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:47:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:08,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:47:08,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:08,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:08,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:08,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:08,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:08,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:47:08,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:08,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:08,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:08,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:08,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:08,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099851840] [2020-10-27 01:47:08,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:08,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:47:08,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632845888] [2020-10-27 01:47:08,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:47:08,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:08,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:47:08,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:47:08,502 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2020-10-27 01:47:08,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:08,842 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-27 01:47:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:47:08,843 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:47:08,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:08,844 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:47:08,844 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:47:08,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:47:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-27 01:47:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:47:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-27 01:47:08,857 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-10-27 01:47:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:08,858 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-27 01:47:08,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:47:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-27 01:47:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:47:08,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:08,860 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:08,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:47:08,861 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1081369507, now seen corresponding path program 2 times [2020-10-27 01:47:08,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:08,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929139619] [2020-10-27 01:47:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:08,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:09,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:47:09,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:09,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 01:47:09,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:09,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:09,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:09,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:47:09,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:09,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:09,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:09,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:09,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:09,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:47:09,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:09,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:09,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:09,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:09,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:09,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929139619] [2020-10-27 01:47:09,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:09,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:47:09,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531587435] [2020-10-27 01:47:09,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:47:09,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:47:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:47:09,366 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 9 states. [2020-10-27 01:47:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:09,728 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-27 01:47:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:47:09,729 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 01:47:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:09,730 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:47:09,730 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:47:09,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:47:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:47:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-27 01:47:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:47:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-27 01:47:09,740 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-10-27 01:47:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:09,740 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-27 01:47:09,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:47:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-27 01:47:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:47:09,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:09,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:09,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:47:09,742 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:09,742 INFO L82 PathProgramCache]: Analyzing trace with hash 142743556, now seen corresponding path program 1 times [2020-10-27 01:47:09,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:09,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69837680] [2020-10-27 01:47:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:09,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:09,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:47:09,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:09,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 01:47:09,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:47:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:47:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:47:09,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:10,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:10,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:10,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:10,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:10,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:10,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:10,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:10,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:10,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:10,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:10,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:10,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69837680] [2020-10-27 01:47:10,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:10,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:47:10,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155279397] [2020-10-27 01:47:10,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:47:10,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:47:10,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:47:10,079 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2020-10-27 01:47:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:10,329 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-27 01:47:10,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:47:10,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-27 01:47:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:10,330 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:47:10,330 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:47:10,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:47:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-27 01:47:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:47:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 01:47:10,339 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-27 01:47:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:10,339 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 01:47:10,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:47:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 01:47:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:47:10,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:10,341 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:10,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:47:10,341 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:10,342 INFO L82 PathProgramCache]: Analyzing trace with hash -441724029, now seen corresponding path program 2 times [2020-10-27 01:47:10,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:10,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781841746] [2020-10-27 01:47:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:10,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:10,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:10,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:10,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:47:10,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:10,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-27 01:47:10,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:10,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:10,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:10,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:47:10,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:10,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:10,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:10,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:10,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:10,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:10,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:10,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:10,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:10,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:10,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:10,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781841746] [2020-10-27 01:47:10,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:10,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:47:10,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966368623] [2020-10-27 01:47:10,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:47:10,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:47:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:47:10,710 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2020-10-27 01:47:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:11,127 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-27 01:47:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:47:11,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 01:47:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:11,130 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:47:11,130 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:47:11,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:47:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:47:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 01:47:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:47:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 01:47:11,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-27 01:47:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:11,142 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 01:47:11,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:47:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 01:47:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:47:11,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:11,143 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:11,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:47:11,143 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash 232052886, now seen corresponding path program 3 times [2020-10-27 01:47:11,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:11,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754687012] [2020-10-27 01:47:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:11,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:11,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:47:11,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:11,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-27 01:47:11,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:11,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:47:11,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:11,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:47:11,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:11,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:11,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:11,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:11,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:11,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:11,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:11,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:11,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:11,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:11,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:11,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754687012] [2020-10-27 01:47:11,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:11,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:47:11,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315745006] [2020-10-27 01:47:11,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:47:11,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:11,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:47:11,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:47:11,556 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2020-10-27 01:47:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:12,001 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-27 01:47:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:47:12,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-27 01:47:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:12,002 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:47:12,002 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:47:12,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:47:12,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 01:47:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:47:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 01:47:12,016 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2020-10-27 01:47:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:12,016 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 01:47:12,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:47:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 01:47:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:47:12,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:12,017 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:12,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:47:12,018 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:12,018 INFO L82 PathProgramCache]: Analyzing trace with hash -323674059, now seen corresponding path program 3 times [2020-10-27 01:47:12,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:12,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756518827] [2020-10-27 01:47:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:12,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:12,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:47:12,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:12,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-27 01:47:12,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:47:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:47:12,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:12,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:12,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:12,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:12,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:12,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:47:12,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:12,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:12,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756518827] [2020-10-27 01:47:12,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:12,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:47:12,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038367445] [2020-10-27 01:47:12,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:47:12,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:47:12,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:47:12,465 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-27 01:47:12,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:12,743 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-27 01:47:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:47:12,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:47:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:12,744 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:47:12,744 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:47:12,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:47:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 01:47:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:47:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 01:47:12,759 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-27 01:47:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:12,760 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 01:47:12,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:47:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 01:47:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:47:12,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:12,761 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:12,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:47:12,761 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:12,762 INFO L82 PathProgramCache]: Analyzing trace with hash -326958589, now seen corresponding path program 4 times [2020-10-27 01:47:12,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:12,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590866206] [2020-10-27 01:47:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:12,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:13,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:13,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:47:13,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:13,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-27 01:47:13,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:47:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:13,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:13,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:13,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:13,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:13,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:13,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:47:13,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:13,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:13,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590866206] [2020-10-27 01:47:13,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:13,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:13,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110657566] [2020-10-27 01:47:13,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:13,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:13,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:13,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:13,255 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2020-10-27 01:47:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:13,793 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-27 01:47:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:47:13,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-27 01:47:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:13,794 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:47:13,794 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:47:13,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:47:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:47:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 01:47:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:47:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 01:47:13,813 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-27 01:47:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:13,814 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 01:47:13,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 01:47:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:47:13,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:13,817 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:13,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:47:13,817 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:13,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:13,817 INFO L82 PathProgramCache]: Analyzing trace with hash -959092285, now seen corresponding path program 4 times [2020-10-27 01:47:13,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:13,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496672651] [2020-10-27 01:47:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:13,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:14,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:47:14,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:14,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 01:47:14,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:14,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:14,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:14,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:47:14,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:14,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:14,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:14,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:14,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:14,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:47:14,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:14,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:14,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496672651] [2020-10-27 01:47:14,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:14,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:14,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352645727] [2020-10-27 01:47:14,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:14,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:14,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:14,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:14,234 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-10-27 01:47:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:14,717 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-27 01:47:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:47:14,717 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-27 01:47:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:14,718 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:47:14,718 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:47:14,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:47:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:47:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 01:47:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:47:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 01:47:14,728 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2020-10-27 01:47:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:14,728 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 01:47:14,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 01:47:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:47:14,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:14,729 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:14,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:47:14,730 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash -476445130, now seen corresponding path program 5 times [2020-10-27 01:47:14,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:14,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936047191] [2020-10-27 01:47:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:14,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:15,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:47:15,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:15,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 01:47:15,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:15,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:47:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:15,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:15,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:15,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:15,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:15,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:15,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 01:47:15,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:15,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:15,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:15,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936047191] [2020-10-27 01:47:15,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:15,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:47:15,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130349811] [2020-10-27 01:47:15,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:47:15,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:15,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:47:15,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:47:15,254 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2020-10-27 01:47:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:15,808 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-27 01:47:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:47:15,808 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-27 01:47:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:15,809 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:47:15,809 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:47:15,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:47:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:47:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 01:47:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:47:15,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 01:47:15,820 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2020-10-27 01:47:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:15,821 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 01:47:15,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:47:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 01:47:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:47:15,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:15,822 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:15,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:47:15,822 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:15,822 INFO L82 PathProgramCache]: Analyzing trace with hash 817779189, now seen corresponding path program 5 times [2020-10-27 01:47:15,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:15,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161412334] [2020-10-27 01:47:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:15,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:16,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:16,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:47:16,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:16,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-27 01:47:16,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:16,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:16,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:47:16,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:16,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:16,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:16,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:16,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:16,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:16,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:16,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:16,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:16,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161412334] [2020-10-27 01:47:16,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:16,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:47:16,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125851608] [2020-10-27 01:47:16,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:47:16,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:16,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:47:16,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:47:16,301 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-27 01:47:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:16,658 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-27 01:47:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:47:16,659 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-27 01:47:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:16,660 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:47:16,660 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:47:16,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:47:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:47:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 01:47:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:47:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 01:47:16,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 20 [2020-10-27 01:47:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:16,675 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 01:47:16,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:47:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 01:47:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:47:16,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:16,677 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:16,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:47:16,678 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash -815560605, now seen corresponding path program 6 times [2020-10-27 01:47:16,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:16,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60643802] [2020-10-27 01:47:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:16,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:16,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:17,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:17,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:47:17,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:17,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-27 01:47:17,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:17,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:47:17,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:17,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:47:17,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:17,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:17,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:17,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:17,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:17,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:17,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:47:17,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:17,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60643802] [2020-10-27 01:47:17,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:17,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:47:17,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148857015] [2020-10-27 01:47:17,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:47:17,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:47:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:17,347 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-10-27 01:47:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:17,966 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-27 01:47:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:47:17,967 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-27 01:47:17,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:17,967 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:47:17,967 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:47:17,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:47:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:47:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 01:47:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:47:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 01:47:17,980 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2020-10-27 01:47:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:17,980 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 01:47:17,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:47:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 01:47:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:47:17,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:17,981 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:17,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:47:17,982 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:17,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:17,982 INFO L82 PathProgramCache]: Analyzing trace with hash 66220035, now seen corresponding path program 6 times [2020-10-27 01:47:17,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:17,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327131963] [2020-10-27 01:47:17,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:18,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:18,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:18,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:18,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:47:18,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:18,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 01:47:18,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:18,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:47:18,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:18,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:47:18,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:18,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:18,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:18,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:18,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:18,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:18,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:47:18,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:18,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:18,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:18,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:18,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:18,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327131963] [2020-10-27 01:47:18,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:18,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:47:18,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897647674] [2020-10-27 01:47:18,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:47:18,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:18,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:47:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:18,475 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 13 states. [2020-10-27 01:47:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:19,214 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-27 01:47:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:47:19,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-27 01:47:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:19,215 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:47:19,216 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:47:19,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:47:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:47:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:47:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:47:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-27 01:47:19,226 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-27 01:47:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:19,228 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-27 01:47:19,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:47:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-27 01:47:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:47:19,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:19,230 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:19,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:47:19,233 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1757277259, now seen corresponding path program 7 times [2020-10-27 01:47:19,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:19,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650436388] [2020-10-27 01:47:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:19,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:19,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:47:19,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:19,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-27 01:47:19,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:19,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:47:19,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:19,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:47:19,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:19,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:19,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:19,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:19,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:47:19,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:19,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:19,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650436388] [2020-10-27 01:47:19,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:19,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:47:19,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507354590] [2020-10-27 01:47:19,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:47:19,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:19,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:47:19,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:47:19,927 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-27 01:47:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:20,628 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 01:47:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:47:20,629 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-27 01:47:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:20,629 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:47:20,630 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:47:20,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:47:20,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:47:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:47:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:47:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 01:47:20,647 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-27 01:47:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:20,647 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 01:47:20,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:47:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 01:47:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:47:20,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:20,648 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:20,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:47:20,649 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1843848771, now seen corresponding path program 8 times [2020-10-27 01:47:20,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:20,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518969072] [2020-10-27 01:47:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:20,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:21,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:21,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:47:21,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:21,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-27 01:47:21,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:21,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:47:21,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:21,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:47:21,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:21,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:21,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:21,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:21,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:21,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:21,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:21,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:21,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:21,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518969072] [2020-10-27 01:47:21,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:21,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:47:21,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652680493] [2020-10-27 01:47:21,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:47:21,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:47:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:47:21,356 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 12 states. [2020-10-27 01:47:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:21,931 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-27 01:47:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:47:21,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-27 01:47:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:21,934 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:47:21,934 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:47:21,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:47:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:47:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:47:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:47:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 01:47:21,949 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-27 01:47:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:21,949 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 01:47:21,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:47:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 01:47:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:47:21,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:21,950 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:21,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:47:21,950 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:21,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1809606005, now seen corresponding path program 9 times [2020-10-27 01:47:21,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:21,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578717659] [2020-10-27 01:47:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:21,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:22,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:22,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:22,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:47:22,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:22,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-27 01:47:22,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:22,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:47:22,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:22,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:47:22,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:22,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:22,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:22,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:22,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:22,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:22,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:22,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:22,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:22,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:22,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:22,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:22,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578717659] [2020-10-27 01:47:22,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:22,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:47:22,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130179739] [2020-10-27 01:47:22,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:47:22,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:22,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:47:22,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:22,776 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-27 01:47:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:23,625 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 01:47:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:47:23,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-27 01:47:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:23,626 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:47:23,626 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:47:23,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:47:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:47:23,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 01:47:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:47:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 01:47:23,642 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-27 01:47:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:23,642 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 01:47:23,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:47:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 01:47:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:47:23,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:23,643 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:23,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:47:23,643 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:23,644 INFO L82 PathProgramCache]: Analyzing trace with hash 748080259, now seen corresponding path program 10 times [2020-10-27 01:47:23,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:23,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113878531] [2020-10-27 01:47:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:23,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:23,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:24,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:24,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:47:24,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:24,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-27 01:47:24,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:24,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:47:24,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:24,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:47:24,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:24,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:24,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:24,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:24,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:24,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:24,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:24,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:24,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:24,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:24,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:24,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:24,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113878531] [2020-10-27 01:47:24,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:24,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:47:24,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183407161] [2020-10-27 01:47:24,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:47:24,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:24,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:47:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:24,474 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-27 01:47:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:25,398 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-27 01:47:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:47:25,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-27 01:47:25,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:25,400 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:47:25,400 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:47:25,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:47:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:47:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 01:47:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:47:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 01:47:25,407 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-27 01:47:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:25,407 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 01:47:25,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:47:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 01:47:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:47:25,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:25,408 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:25,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:47:25,409 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:25,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2094446795, now seen corresponding path program 11 times [2020-10-27 01:47:25,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:25,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785600052] [2020-10-27 01:47:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:25,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:25,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:25,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:25,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:47:25,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:25,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-27 01:47:25,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:47:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:47:25,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:26,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:26,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:26,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:26,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:26,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:26,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:47:26,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:26,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:26,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:26,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:26,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:26,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785600052] [2020-10-27 01:47:26,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:26,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:47:26,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059684704] [2020-10-27 01:47:26,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:47:26,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:26,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:47:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:47:26,319 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-10-27 01:47:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:27,134 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 01:47:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:47:27,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-27 01:47:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:27,135 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:47:27,135 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:47:27,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:47:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:47:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 01:47:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:47:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 01:47:27,142 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-27 01:47:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:27,142 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 01:47:27,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:47:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 01:47:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:47:27,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:27,143 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:27,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:47:27,143 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:27,144 INFO L82 PathProgramCache]: Analyzing trace with hash -18472253, now seen corresponding path program 12 times [2020-10-27 01:47:27,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:27,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258698082] [2020-10-27 01:47:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:27,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:27,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:47:27,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:27,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-27 01:47:27,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:27,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:47:27,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:27,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:47:27,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:28,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:28,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:28,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:28,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:28,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:28,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:47:28,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:28,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:28,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:28,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:28,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:28,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258698082] [2020-10-27 01:47:28,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:28,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:47:28,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594290305] [2020-10-27 01:47:28,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:47:28,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:28,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:47:28,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:47:28,152 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-27 01:47:29,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:29,209 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-27 01:47:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:47:29,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-27 01:47:29,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:29,211 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:47:29,211 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:47:29,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:47:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:47:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:47:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:47:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 01:47:29,218 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-27 01:47:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:29,218 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 01:47:29,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:47:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 01:47:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:29,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:29,219 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:29,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:47:29,219 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:29,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:29,220 INFO L82 PathProgramCache]: Analyzing trace with hash -87770891, now seen corresponding path program 13 times [2020-10-27 01:47:29,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:29,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104261170] [2020-10-27 01:47:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:29,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:29,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:29,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:29,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:29,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:29,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-10-27 01:47:29,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:47:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:29,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:30,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:30,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:30,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:30,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:30,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:30,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:30,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:30,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104261170] [2020-10-27 01:47:30,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:30,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:47:30,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037035942] [2020-10-27 01:47:30,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:47:30,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:30,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:47:30,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:30,362 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 17 states. [2020-10-27 01:47:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:31,357 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 01:47:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:47:31,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-27 01:47:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:31,360 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:47:31,360 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:47:31,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:47:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:47:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:47:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:47:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 01:47:31,374 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-27 01:47:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:31,376 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 01:47:31,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:47:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 01:47:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:31,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:31,377 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:31,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:47:31,377 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2058938627, now seen corresponding path program 14 times [2020-10-27 01:47:31,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:31,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657357180] [2020-10-27 01:47:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:31,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:31,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:32,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:32,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:32,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:32,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-27 01:47:32,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:47:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:47:32,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:32,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:32,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:32,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:32,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:32,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:32,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:32,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:32,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:32,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:32,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:32,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:32,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657357180] [2020-10-27 01:47:32,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:32,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:47:32,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801885179] [2020-10-27 01:47:32,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:47:32,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:32,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:47:32,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:47:32,501 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-27 01:47:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:33,822 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-27 01:47:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:47:33,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-27 01:47:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:33,824 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:47:33,824 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:47:33,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:47:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:47:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:47:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:47:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 01:47:33,831 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-27 01:47:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:33,831 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 01:47:33,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:47:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 01:47:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:47:33,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:33,832 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:33,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:47:33,833 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash -112543051, now seen corresponding path program 15 times [2020-10-27 01:47:33,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:33,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685282800] [2020-10-27 01:47:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:33,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:34,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:34,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:34,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:47:34,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:34,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-27 01:47:34,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:47:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:47:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:34,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:34,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:35,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:35,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:35,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:47:35,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:35,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:35,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:35,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685282800] [2020-10-27 01:47:35,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:35,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:47:35,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812022713] [2020-10-27 01:47:35,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:47:35,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:35,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:47:35,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:47:35,010 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-27 01:47:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:36,471 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 01:47:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:47:36,471 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-27 01:47:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:36,472 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:47:36,472 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:47:36,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:47:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:47:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 01:47:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:47:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 01:47:36,481 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-27 01:47:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:36,481 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 01:47:36,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:47:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 01:47:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:47:36,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:36,482 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:36,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:47:36,482 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1291001667, now seen corresponding path program 16 times [2020-10-27 01:47:36,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:36,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800124411] [2020-10-27 01:47:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:36,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:36,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:36,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:36,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:47:36,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-27 01:47:36,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:47:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:47:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:37,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:37,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:37,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:37,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:37,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:37,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:37,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:37,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:37,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:37,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:37,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:37,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800124411] [2020-10-27 01:47:37,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:37,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:47:37,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830925258] [2020-10-27 01:47:37,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:47:37,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:37,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:47:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:47:37,553 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-27 01:47:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:39,105 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-27 01:47:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:47:39,107 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-27 01:47:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:39,108 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:47:39,108 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:47:39,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:47:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:47:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:47:39,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:47:39,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-27 01:47:39,120 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-27 01:47:39,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:39,120 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-27 01:47:39,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:47:39,121 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-27 01:47:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:47:39,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:39,121 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:39,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:47:39,122 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:39,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1851214965, now seen corresponding path program 17 times [2020-10-27 01:47:39,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:39,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283232105] [2020-10-27 01:47:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:39,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:39,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:39,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:39,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:47:39,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:39,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-10-27 01:47:39,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:39,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:47:39,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:39,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:47:39,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:40,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:40,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:40,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:40,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:40,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:40,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:40,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:40,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:40,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283232105] [2020-10-27 01:47:40,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:40,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:47:40,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373829429] [2020-10-27 01:47:40,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:47:40,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:40,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:47:40,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:47:40,433 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 21 states. [2020-10-27 01:47:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:41,867 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 01:47:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:47:41,868 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-27 01:47:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:41,869 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:47:41,869 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:47:41,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:47:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:47:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 01:47:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:47:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 01:47:41,877 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-27 01:47:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:41,877 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 01:47:41,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:47:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 01:47:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:47:41,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:41,878 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:41,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:47:41,878 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2037958019, now seen corresponding path program 18 times [2020-10-27 01:47:41,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:41,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460780383] [2020-10-27 01:47:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:41,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:42,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:42,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:42,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:47:42,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:42,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-27 01:47:42,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:42,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:47:42,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:42,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:47:42,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:43,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:43,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:43,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:43,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:43,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:43,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:43,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:43,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:43,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:43,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:43,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:43,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460780383] [2020-10-27 01:47:43,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:43,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:47:43,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333389552] [2020-10-27 01:47:43,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:47:43,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:43,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:47:43,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:47:43,169 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-27 01:47:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:44,894 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-27 01:47:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:47:44,894 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-27 01:47:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:44,895 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:47:44,895 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:47:44,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=139, Invalid=2023, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:47:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:47:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:47:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:47:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 01:47:44,904 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-27 01:47:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:44,904 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 01:47:44,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:47:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 01:47:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:47:44,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:44,905 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:44,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:47:44,905 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:44,906 INFO L82 PathProgramCache]: Analyzing trace with hash -762941899, now seen corresponding path program 19 times [2020-10-27 01:47:44,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:44,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235557644] [2020-10-27 01:47:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:44,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:45,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:45,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:45,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:47:45,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:45,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-27 01:47:45,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:45,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:47:45,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:45,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:47:45,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:46,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:46,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:46,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:46,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:46,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:46,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:46,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235557644] [2020-10-27 01:47:46,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:46,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:47:46,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544006156] [2020-10-27 01:47:46,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:47:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:47:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:47:46,283 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 23 states. [2020-10-27 01:47:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:47,909 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 01:47:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:47:47,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-27 01:47:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:47,911 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:47:47,911 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:47:47,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:47:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:47:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 01:47:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:47:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 01:47:47,919 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-27 01:47:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:47,919 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 01:47:47,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:47:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 01:47:47,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:47:47,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:47,920 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:47,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:47:47,920 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1691493437, now seen corresponding path program 20 times [2020-10-27 01:47:47,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:47,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418527266] [2020-10-27 01:47:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:47,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:49,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:49,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:47:49,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:49,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1078 [2020-10-27 01:47:49,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:49,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:47:49,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:49,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:47:49,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:49,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:49,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:49,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:49,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:49,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:49,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:49,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:49,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:49,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418527266] [2020-10-27 01:47:49,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:49,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:47:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759907221] [2020-10-27 01:47:49,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:47:49,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:47:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:47:49,761 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-27 01:47:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:51,824 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-27 01:47:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:47:51,825 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-27 01:47:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:51,826 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:47:51,826 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:47:51,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:47:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:47:51,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:47:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:47:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 01:47:51,838 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-27 01:47:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:51,839 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 01:47:51,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:47:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 01:47:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:47:51,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:51,840 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:51,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:47:51,841 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash -411820043, now seen corresponding path program 21 times [2020-10-27 01:47:51,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:51,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074446644] [2020-10-27 01:47:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:51,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:52,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:52,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:52,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:47:52,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:52,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 760 [2020-10-27 01:47:52,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:47:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:47:52,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:53,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:53,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:53,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:53,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:53,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:53,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:53,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:53,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:53,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:53,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:53,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074446644] [2020-10-27 01:47:53,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:53,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:47:53,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80122551] [2020-10-27 01:47:53,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:47:53,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:47:53,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:47:53,401 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-27 01:47:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:55,544 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 01:47:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:47:55,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-27 01:47:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:55,545 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:47:55,545 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:47:55,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=157, Invalid=2599, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:47:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:47:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 01:47:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:47:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 01:47:55,553 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-27 01:47:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:55,554 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 01:47:55,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:47:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 01:47:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:47:55,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:55,554 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:55,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:47:55,554 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:55,555 INFO L82 PathProgramCache]: Analyzing trace with hash 603349507, now seen corresponding path program 22 times [2020-10-27 01:47:55,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:55,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307206900] [2020-10-27 01:47:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:55,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:55,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:56,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:56,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:47:56,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:56,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1176 [2020-10-27 01:47:56,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:56,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:47:56,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:56,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:47:56,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:57,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:57,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:57,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:57,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:57,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:57,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:57,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:57,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:57,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:57,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:57,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:57,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307206900] [2020-10-27 01:47:57,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:57,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:47:57,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235669718] [2020-10-27 01:47:57,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:47:57,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:47:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:47:57,493 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-27 01:47:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:59,797 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-27 01:47:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:47:59,797 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-27 01:47:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:59,798 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:47:59,798 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:47:59,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=163, Invalid=2807, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:47:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:47:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:47:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:47:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 01:47:59,806 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-27 01:47:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:59,806 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 01:47:59,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:47:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 01:47:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:47:59,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:59,807 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:59,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:47:59,807 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2008834485, now seen corresponding path program 23 times [2020-10-27 01:47:59,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:59,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523700774] [2020-10-27 01:47:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:59,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:00,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:00,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:00,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:48:00,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:00,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-27 01:48:00,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:48:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:48:00,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:01,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:01,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:01,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:01,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:01,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:01,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:01,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:01,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523700774] [2020-10-27 01:48:01,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:01,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:48:01,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859095131] [2020-10-27 01:48:01,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:48:01,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:01,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:48:01,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:48:01,298 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 27 states. [2020-10-27 01:48:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:03,477 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 01:48:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:48:03,477 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-27 01:48:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:03,478 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:48:03,478 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:48:03,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:48:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:48:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:48:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:48:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 01:48:03,487 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-27 01:48:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:03,487 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 01:48:03,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:48:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 01:48:03,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:48:03,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:03,488 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:03,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:48:03,488 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1665771453, now seen corresponding path program 24 times [2020-10-27 01:48:03,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:03,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010292797] [2020-10-27 01:48:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:03,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:03,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:04,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:04,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:48:04,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:04,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-10-27 01:48:04,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:04,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:48:04,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:04,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:48:04,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:05,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:05,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:05,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:05,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:05,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:05,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:05,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:05,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:05,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:05,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:05,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010292797] [2020-10-27 01:48:05,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:05,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:48:05,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722483066] [2020-10-27 01:48:05,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:48:05,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:48:05,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:48:05,572 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 28 states. [2020-10-27 01:48:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:07,723 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-27 01:48:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:48:07,727 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-27 01:48:07,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:07,728 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:48:07,728 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:48:07,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:48:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:48:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:48:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:48:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-27 01:48:07,734 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-27 01:48:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:07,735 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-27 01:48:07,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:48:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-27 01:48:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:48:07,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:07,735 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:07,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:48:07,736 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:07,736 INFO L82 PathProgramCache]: Analyzing trace with hash 385561461, now seen corresponding path program 25 times [2020-10-27 01:48:07,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:07,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537986306] [2020-10-27 01:48:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:07,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:08,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:08,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:08,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:48:08,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:08,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-27 01:48:08,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:08,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:48:08,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:08,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:48:08,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:09,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:09,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:09,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:09,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:09,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:09,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:09,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:09,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:09,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537986306] [2020-10-27 01:48:09,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:09,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:48:09,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47527184] [2020-10-27 01:48:09,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:48:09,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:09,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:48:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:48:09,696 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-27 01:48:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:12,362 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 01:48:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:48:12,368 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-27 01:48:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:12,368 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:48:12,368 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:48:12,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=181, Invalid=3479, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:48:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:48:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 01:48:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:48:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 01:48:12,377 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-27 01:48:12,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:12,378 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 01:48:12,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:48:12,378 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 01:48:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:48:12,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:12,379 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:12,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:48:12,379 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash -447627645, now seen corresponding path program 26 times [2020-10-27 01:48:12,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:12,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330901459] [2020-10-27 01:48:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:13,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:13,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:48:13,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:13,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-27 01:48:13,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:48:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:48:13,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:14,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:14,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:14,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:14,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:14,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:14,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:14,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:14,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330901459] [2020-10-27 01:48:14,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:14,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:48:14,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152723977] [2020-10-27 01:48:14,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:48:14,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:14,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:48:14,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:48:14,354 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-27 01:48:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:17,289 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-27 01:48:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:48:17,290 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-27 01:48:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:17,291 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:48:17,291 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:48:17,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=187, Invalid=3719, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:48:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:48:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:48:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:48:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 01:48:17,301 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-27 01:48:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:17,301 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 01:48:17,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:48:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 01:48:17,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:48:17,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:17,302 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:17,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:48:17,302 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash -506686155, now seen corresponding path program 27 times [2020-10-27 01:48:17,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:17,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364691002] [2020-10-27 01:48:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:17,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:17,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:18,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:18,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:48:18,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:18,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-27 01:48:18,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:18,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:48:18,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:18,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:48:18,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:19,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:19,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:19,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:19,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:19,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:19,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:19,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:19,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:19,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:19,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:19,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364691002] [2020-10-27 01:48:19,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:19,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:48:19,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289557790] [2020-10-27 01:48:19,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:48:19,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:19,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:48:19,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:48:19,522 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-27 01:48:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:22,568 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 01:48:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:48:22,569 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-27 01:48:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:22,570 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:48:22,570 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:48:22,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=193, Invalid=3967, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:48:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:48:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 01:48:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:48:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 01:48:22,578 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-27 01:48:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:22,579 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 01:48:22,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:48:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 01:48:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:48:22,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:22,579 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:22,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:48:22,579 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1957467331, now seen corresponding path program 28 times [2020-10-27 01:48:22,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:22,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513147845] [2020-10-27 01:48:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:22,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:22,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:23,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:23,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:48:23,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:23,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1287 [2020-10-27 01:48:23,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:23,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:48:23,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:23,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:48:23,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:24,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:24,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:24,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:24,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:24,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:24,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:24,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:24,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:24,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513147845] [2020-10-27 01:48:24,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:24,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:48:24,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548347847] [2020-10-27 01:48:24,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:48:24,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:24,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:48:24,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:48:24,874 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 32 states. [2020-10-27 01:48:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:27,723 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-27 01:48:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:48:27,724 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2020-10-27 01:48:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:27,724 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:48:27,725 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:48:27,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:48:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:48:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:48:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:48:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-27 01:48:27,733 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-27 01:48:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:27,733 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-27 01:48:27,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:48:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-27 01:48:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:48:27,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:27,733 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:27,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:48:27,734 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:27,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:27,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1036814069, now seen corresponding path program 29 times [2020-10-27 01:48:27,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:27,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937058524] [2020-10-27 01:48:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:27,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:28,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:28,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:28,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:48:28,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:28,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-27 01:48:28,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:28,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:48:28,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:28,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:48:28,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:30,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:30,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:30,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:30,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:30,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:30,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:30,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:30,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:30,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:30,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:30,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:30,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937058524] [2020-10-27 01:48:30,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:30,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:48:30,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652364276] [2020-10-27 01:48:30,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:48:30,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:30,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:48:30,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:48:30,039 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-27 01:48:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:33,414 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 01:48:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:48:33,415 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-27 01:48:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:33,416 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:48:33,416 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:48:33,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=205, Invalid=4487, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:48:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:48:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 01:48:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:48:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 01:48:33,423 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-27 01:48:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:33,424 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 01:48:33,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:48:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 01:48:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:48:33,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:33,424 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:33,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:48:33,424 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:33,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1733633277, now seen corresponding path program 30 times [2020-10-27 01:48:33,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:33,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215654638] [2020-10-27 01:48:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:33,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:34,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:48:34,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:34,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-27 01:48:34,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:34,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:48:34,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:34,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:48:34,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:35,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:35,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:35,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:35,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:35,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:35,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:35,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:35,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:35,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215654638] [2020-10-27 01:48:35,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:35,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:48:35,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187378337] [2020-10-27 01:48:35,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:48:35,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:35,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:48:35,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:48:35,929 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 34 states. [2020-10-27 01:48:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:39,030 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-27 01:48:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:48:39,031 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-10-27 01:48:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:39,031 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:48:39,032 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:48:39,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:48:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:48:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:48:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:48:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 01:48:39,040 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-27 01:48:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:39,040 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 01:48:39,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:48:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 01:48:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:48:39,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:39,040 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:39,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:48:39,041 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:39,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1718155083, now seen corresponding path program 31 times [2020-10-27 01:48:39,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:39,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081131176] [2020-10-27 01:48:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:39,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:39,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:39,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:48:39,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:39,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-27 01:48:39,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:39,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:48:39,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:39,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:48:39,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:41,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:41,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:41,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:41,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:41,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:41,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:41,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:41,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:41,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:41,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:41,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:41,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081131176] [2020-10-27 01:48:41,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:41,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:48:41,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397052878] [2020-10-27 01:48:41,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:48:41,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:41,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:48:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:48:41,059 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 35 states. [2020-10-27 01:48:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:44,371 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 01:48:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:48:44,372 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2020-10-27 01:48:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:44,373 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:48:44,373 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:48:44,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:48:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:48:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 01:48:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:48:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 01:48:44,381 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-27 01:48:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:44,381 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 01:48:44,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:48:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 01:48:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:48:44,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:44,382 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:44,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:48:44,383 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:44,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1238331069, now seen corresponding path program 32 times [2020-10-27 01:48:44,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:44,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273098336] [2020-10-27 01:48:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:44,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:45,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:45,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:45,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:48:45,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:45,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-27 01:48:45,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:45,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:48:45,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:48:45,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:46,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:46,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:46,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:46,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:46,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:46,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:46,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:46,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:46,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:46,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:46,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:46,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273098336] [2020-10-27 01:48:46,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:46,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:48:46,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724532323] [2020-10-27 01:48:46,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:48:46,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:46,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:48:46,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:48:46,813 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 36 states. [2020-10-27 01:48:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:50,383 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-27 01:48:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:48:50,384 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2020-10-27 01:48:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:50,385 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:48:50,385 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:48:50,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:48:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:48:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:48:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:48:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 01:48:50,393 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-27 01:48:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:50,394 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 01:48:50,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:48:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 01:48:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:48:50,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:50,394 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:50,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:48:50,395 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash 751311477, now seen corresponding path program 33 times [2020-10-27 01:48:50,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:50,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141293185] [2020-10-27 01:48:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:50,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:51,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:51,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:51,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:48:51,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:51,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-10-27 01:48:51,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:51,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:48:51,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:51,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:48:51,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:53,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:53,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:53,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:53,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:53,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:53,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:53,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:53,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:53,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141293185] [2020-10-27 01:48:53,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:53,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:48:53,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453955097] [2020-10-27 01:48:53,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:48:53,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:53,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:48:53,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:48:53,343 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-27 01:48:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:57,472 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 01:48:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:48:57,473 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-27 01:48:57,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:57,474 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:48:57,474 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:48:57,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=229, Invalid=5623, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:48:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:48:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 01:48:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:48:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 01:48:57,481 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-27 01:48:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:57,482 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 01:48:57,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:48:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 01:48:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:48:57,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:57,482 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:57,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:48:57,482 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1994279037, now seen corresponding path program 34 times [2020-10-27 01:48:57,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:57,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761341713] [2020-10-27 01:48:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:57,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:57,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:58,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:58,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:48:58,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:58,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1304 [2020-10-27 01:48:58,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:48:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:48:58,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:00,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:00,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:00,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:00,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:00,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:00,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:49:00,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:00,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:00,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761341713] [2020-10-27 01:49:00,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:00,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:49:00,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616345889] [2020-10-27 01:49:00,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:49:00,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:00,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:49:00,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:49:00,398 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-27 01:49:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:04,754 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-27 01:49:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:49:04,761 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-27 01:49:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:04,762 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:49:04,762 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:49:04,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=235, Invalid=5927, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:49:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:49:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:49:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:49:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 01:49:04,768 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-27 01:49:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:04,769 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 01:49:04,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:49:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 01:49:04,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:49:04,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:04,769 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:04,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:49:04,769 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:04,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1208239051, now seen corresponding path program 35 times [2020-10-27 01:49:04,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:04,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738534270] [2020-10-27 01:49:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:04,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:05,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:05,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:05,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:49:05,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:05,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 934 [2020-10-27 01:49:05,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:49:05,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:49:05,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:49:05,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:07,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:07,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:07,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:07,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:07,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:07,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:07,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:07,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:07,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738534270] [2020-10-27 01:49:07,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:07,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:49:07,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683664462] [2020-10-27 01:49:07,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:49:07,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:07,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:49:07,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:49:07,412 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-27 01:49:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:11,956 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 01:49:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:49:11,957 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-27 01:49:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:11,958 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:49:11,958 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:49:11,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=241, Invalid=6239, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:49:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:49:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:49:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:49:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 01:49:11,967 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-27 01:49:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:11,967 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 01:49:11,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:49:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 01:49:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:49:11,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:11,968 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:11,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:49:11,968 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1684164035, now seen corresponding path program 36 times [2020-10-27 01:49:11,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:11,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510689709] [2020-10-27 01:49:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:11,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:12,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:49:12,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:12,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-27 01:49:12,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:12,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:49:12,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:49:12,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:49:12,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:14,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:14,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:14,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:14,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:14,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:14,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:14,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:14,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:14,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510689709] [2020-10-27 01:49:14,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:14,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:49:14,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638037594] [2020-10-27 01:49:14,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:49:14,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:49:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:49:14,502 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 40 states. [2020-10-27 01:49:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:18,783 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-27 01:49:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:49:18,788 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 51 [2020-10-27 01:49:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:18,789 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:49:18,789 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:49:18,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:49:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:49:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:49:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:49:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 01:49:18,796 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-27 01:49:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:18,796 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 01:49:18,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:49:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 01:49:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:49:18,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:18,797 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:18,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:49:18,797 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1154346485, now seen corresponding path program 37 times [2020-10-27 01:49:18,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:18,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968876901] [2020-10-27 01:49:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:18,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:20,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:20,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:49:20,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:20,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1198 [2020-10-27 01:49:20,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:20,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:49:20,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:49:20,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:49:20,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:21,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:21,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:21,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:21,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:21,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:21,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:21,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:21,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:21,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968876901] [2020-10-27 01:49:21,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:21,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:49:21,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241636228] [2020-10-27 01:49:21,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:49:21,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:49:21,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:49:21,844 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-27 01:49:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:26,821 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 01:49:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:49:26,822 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-27 01:49:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:26,823 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:49:26,823 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:49:26,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=253, Invalid=6887, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:49:26,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:49:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 01:49:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:49:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 01:49:26,830 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-27 01:49:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:26,831 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 01:49:26,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:49:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 01:49:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:49:26,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:26,831 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:26,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:49:26,832 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:26,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1909871619, now seen corresponding path program 38 times [2020-10-27 01:49:26,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:26,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515609495] [2020-10-27 01:49:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:26,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:27,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:29,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:49:29,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:29,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2207 [2020-10-27 01:49:29,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:49:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:49:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:49:29,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:30,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:30,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:30,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:30,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:30,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:30,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:30,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515609495] [2020-10-27 01:49:30,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:30,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:49:30,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275950387] [2020-10-27 01:49:30,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:49:30,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:49:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:49:30,807 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 42 states. [2020-10-27 01:49:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:35,491 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-27 01:49:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:49:35,492 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 53 [2020-10-27 01:49:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:35,493 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:49:35,493 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:49:35,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:49:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:49:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:49:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:49:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-27 01:49:35,502 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-27 01:49:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:35,502 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-27 01:49:35,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:49:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-27 01:49:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:49:35,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:35,503 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:35,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:49:35,503 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash -438653003, now seen corresponding path program 39 times [2020-10-27 01:49:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:35,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331404407] [2020-10-27 01:49:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:35,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:36,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:36,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:49:36,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:36,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1418 [2020-10-27 01:49:36,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:36,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:49:36,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:49:36,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:49:36,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:38,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:38,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:38,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:38,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:38,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:38,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:38,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:38,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:38,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331404407] [2020-10-27 01:49:38,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:38,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:49:38,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163065700] [2020-10-27 01:49:38,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:49:38,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:38,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:49:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:49:38,869 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-27 01:49:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:44,223 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 01:49:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:49:44,224 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-27 01:49:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:44,225 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:49:44,225 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:49:44,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=265, Invalid=7567, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:49:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:49:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 01:49:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:49:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 01:49:44,233 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-27 01:49:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:44,233 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 01:49:44,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:49:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 01:49:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:49:44,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:44,234 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:44,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:49:44,234 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash -228472253, now seen corresponding path program 40 times [2020-10-27 01:49:44,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:44,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090218265] [2020-10-27 01:49:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:44,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:45,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:45,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:45,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:49:45,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:45,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-27 01:49:45,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:49:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:49:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:49:45,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:47,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:47,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:47,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:47,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:47,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:47,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:47,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:47,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090218265] [2020-10-27 01:49:47,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:47,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:49:47,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656411282] [2020-10-27 01:49:47,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:49:47,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:47,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:49:47,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:49:47,782 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 44 states. [2020-10-27 01:49:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:52,950 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-27 01:49:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:49:52,951 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 55 [2020-10-27 01:49:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:52,952 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:49:52,952 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:49:52,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:49:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:49:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:49:52,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:49:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 01:49:52,962 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-27 01:49:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:52,963 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 01:49:52,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:49:52,963 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 01:49:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:49:52,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:52,963 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:52,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:49:52,964 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:52,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:52,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1992163701, now seen corresponding path program 41 times [2020-10-27 01:49:52,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:52,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634305789] [2020-10-27 01:49:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:52,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:54,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:54,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:54,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:49:54,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:54,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-27 01:49:54,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:54,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:49:54,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:49:54,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:49:54,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:56,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:56,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:56,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:56,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:56,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:49:56,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:56,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:56,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634305789] [2020-10-27 01:49:56,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:56,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:49:56,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686536674] [2020-10-27 01:49:56,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:49:56,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:56,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:49:56,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:49:56,381 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 45 states. [2020-10-27 01:50:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:01,626 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 01:50:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:50:01,627 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 56 [2020-10-27 01:50:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:01,628 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:50:01,628 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:50:01,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:50:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:50:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 01:50:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:50:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 01:50:01,636 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-27 01:50:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:01,637 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 01:50:01,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:50:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 01:50:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:50:01,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:01,637 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:01,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:50:01,638 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:01,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:01,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2112401539, now seen corresponding path program 42 times [2020-10-27 01:50:01,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:01,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715141082] [2020-10-27 01:50:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:01,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:02,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:03,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:03,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:50:03,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:03,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-27 01:50:03,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:03,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:50:03,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:50:03,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:50:03,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:05,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:05,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:05,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:05,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:05,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:05,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:05,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:05,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:05,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715141082] [2020-10-27 01:50:05,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:05,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:50:05,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839663219] [2020-10-27 01:50:05,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:50:05,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:05,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:50:05,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:50:05,506 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-27 01:50:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:11,784 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-27 01:50:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:50:11,785 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-27 01:50:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:11,786 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:50:11,786 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:50:11,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=283, Invalid=8647, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:50:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:50:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:50:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:50:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-27 01:50:11,800 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-27 01:50:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:11,800 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-27 01:50:11,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:50:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-27 01:50:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:50:11,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:11,801 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:11,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:50:11,801 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1544807221, now seen corresponding path program 43 times [2020-10-27 01:50:11,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:11,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39082352] [2020-10-27 01:50:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:11,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:13,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:13,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:50:13,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:13,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2145 [2020-10-27 01:50:13,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:13,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:50:13,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:50:13,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:50:13,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:16,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:16,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:16,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:16,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:16,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:16,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:16,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:16,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:16,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:16,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:16,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:16,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39082352] [2020-10-27 01:50:16,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:16,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:50:16,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387991604] [2020-10-27 01:50:16,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:50:16,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:50:16,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:50:16,153 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 47 states. [2020-10-27 01:50:22,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:22,181 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 01:50:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:50:22,182 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 58 [2020-10-27 01:50:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:22,183 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:50:22,183 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:50:22,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:50:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:50:22,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 01:50:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:50:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 01:50:22,193 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-27 01:50:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:22,193 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 01:50:22,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:50:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 01:50:22,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:50:22,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:22,194 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:22,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:50:22,194 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1129252547, now seen corresponding path program 44 times [2020-10-27 01:50:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:22,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904029546] [2020-10-27 01:50:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:22,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:23,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:24,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:24,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:50:24,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:24,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2394 [2020-10-27 01:50:24,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:50:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:50:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:50:24,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:26,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:26,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:26,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:26,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:26,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:26,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904029546] [2020-10-27 01:50:26,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:26,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:50:26,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303165070] [2020-10-27 01:50:26,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:50:26,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:50:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:50:26,817 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 48 states. [2020-10-27 01:50:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:33,007 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-27 01:50:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:50:33,008 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 59 [2020-10-27 01:50:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:33,009 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:50:33,010 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:50:33,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:50:33,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:50:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:50:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:50:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-27 01:50:33,020 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-27 01:50:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:33,020 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-27 01:50:33,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:50:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-27 01:50:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:50:33,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:33,021 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:33,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:50:33,021 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1131959541, now seen corresponding path program 45 times [2020-10-27 01:50:33,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:33,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372758024] [2020-10-27 01:50:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:33,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:34,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:35,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:35,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:50:35,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:35,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2295 [2020-10-27 01:50:35,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:35,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:50:35,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:50:35,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:50:35,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:37,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:37,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:37,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:37,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:37,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:37,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:37,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:37,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372758024] [2020-10-27 01:50:37,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:37,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:50:37,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059405231] [2020-10-27 01:50:37,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:50:37,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:37,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:50:37,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:50:37,983 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 52 states. [2020-10-27 01:50:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:44,854 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-27 01:50:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:50:44,855 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-27 01:50:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:44,856 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:50:44,856 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:50:44,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=301, Invalid=9799, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 01:50:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:50:44,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 01:50:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:50:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-27 01:50:44,867 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-27 01:50:44,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:44,867 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-27 01:50:44,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:50:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-27 01:50:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:50:44,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:44,868 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:44,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:50:44,868 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1215876355, now seen corresponding path program 46 times [2020-10-27 01:50:44,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:44,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161759926] [2020-10-27 01:50:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:46,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:48,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:48,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:50:48,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:48,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3475 [2020-10-27 01:50:48,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:48,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:50:48,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:50:48,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:50:48,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0