/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/list-properties/list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:19:25,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:19:25,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:19:25,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:19:25,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:19:25,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:19:25,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:19:25,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:19:25,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:19:25,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:19:25,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:19:25,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:19:25,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:19:25,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:19:25,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:19:25,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:19:25,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:19:25,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:19:25,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:19:25,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:19:25,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:19:25,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:19:25,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:19:25,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:19:25,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:19:25,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:19:25,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:19:25,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:19:25,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:19:25,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:19:25,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:19:25,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:19:25,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:19:25,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:19:25,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:19:25,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:19:25,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:19:25,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:19:25,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:19:25,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:19:25,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:19:25,814 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 01:19:25,873 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:19:25,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:19:25,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:19:25,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:19:25,879 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:19:25,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:19:25,880 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:19:25,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:19:25,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:19:25,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:19:25,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:19:25,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:19:25,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:19:25,883 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:19:25,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:19:25,883 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:19:25,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:19:25,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:19:25,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:19:25,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:19:25,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:19:25,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:19:25,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:19:25,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:19:25,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:19:25,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:19:25,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:19:25,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:19:25,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:19:25,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:19:26,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:19:26,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:19:26,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:19:26,292 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:19:26,292 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:19:26,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-1.i [2020-10-27 01:19:26,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ffe180ea/48ee226b481344439b799f0e5540196c/FLAG04a4e0465 [2020-10-27 01:19:27,054 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:19:27,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-1.i [2020-10-27 01:19:27,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ffe180ea/48ee226b481344439b799f0e5540196c/FLAG04a4e0465 [2020-10-27 01:19:27,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ffe180ea/48ee226b481344439b799f0e5540196c [2020-10-27 01:19:27,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:19:27,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:19:27,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:27,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:19:27,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:19:27,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:27" (1/1) ... [2020-10-27 01:19:27,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eecc531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27, skipping insertion in model container [2020-10-27 01:19:27,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:27" (1/1) ... [2020-10-27 01:19:27,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:19:27,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:19:27,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:27,783 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:19:27,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:27,930 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:19:27,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27 WrapperNode [2020-10-27 01:19:27,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:27,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:19:27,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:19:27,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:19:27,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27" (1/1) ... [2020-10-27 01:19:27,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27" (1/1) ... [2020-10-27 01:19:27,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27" (1/1) ... [2020-10-27 01:19:27,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27" (1/1) ... [2020-10-27 01:19:28,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27" (1/1) ... [2020-10-27 01:19:28,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27" (1/1) ... [2020-10-27 01:19:28,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27" (1/1) ... [2020-10-27 01:19:28,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:19:28,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:19:28,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:19:28,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:19:28,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27" (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 01:19:28,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:19:28,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:19:28,136 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:19:28,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:19:28,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:19:28,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-27 01:19:28,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-27 01:19:28,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-27 01:19:28,138 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:19:28,138 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:19:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:19:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:19:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:19:28,140 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:19:28,140 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:19:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:19:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:19:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:19:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:19:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:19:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:19:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:19:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:19:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:19:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:19:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:19:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:19:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:19:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:19:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:19:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:19:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:19:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:19:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:19:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:19:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-27 01:19:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-27 01:19:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-27 01:19:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:19:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:19:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:19:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:19:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:19:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:19:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:19:28,145 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:19:28,159 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:19:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:19:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:19:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:19:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:19:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:19:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:19:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:19:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:19:28,165 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:19:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:19:28,166 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:19:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:19:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:19:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:19:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:19:28,167 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:19:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:19:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:19:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:19:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:19:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:19:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:19:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:19:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:19:28,168 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:19:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:19:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:19:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:19:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:19:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:19:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:19:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:19:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:19:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:19:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:19:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:19:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:19:28,173 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:19:28,174 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:19:28,174 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:19:28,174 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:19:28,175 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:19:28,175 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:19:28,175 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:19:28,175 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:19:28,175 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:19:28,175 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:19:28,175 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:19:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:19:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:19:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:19:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:19:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:19:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:19:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:19:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:19:28,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:19:28,177 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:19:28,177 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:19:28,177 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:19:28,177 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:19:28,177 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:19:28,177 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:19:28,177 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:19:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:19:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:19:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:19:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:19:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:19:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:19:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:19:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:19:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:19:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:19:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:19:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:19:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:19:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:19:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:19:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:19:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:19:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:19:28,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:19:28,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:19:28,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:19:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:19:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:19:28,766 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:19:29,025 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:19:29,026 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 01:19:29,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:29 BoogieIcfgContainer [2020-10-27 01:19:29,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:19:29,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:19:29,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:19:29,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:19:29,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:19:27" (1/3) ... [2020-10-27 01:19:29,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61095c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:29, skipping insertion in model container [2020-10-27 01:19:29,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:27" (2/3) ... [2020-10-27 01:19:29,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61095c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:29, skipping insertion in model container [2020-10-27 01:19:29,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:29" (3/3) ... [2020-10-27 01:19:29,036 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2020-10-27 01:19:29,048 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:19:29,053 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:19:29,066 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:19:29,093 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:19:29,093 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:19:29,093 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:19:29,093 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:19:29,093 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:19:29,093 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:19:29,093 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:19:29,094 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:19:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-27 01:19:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:19:29,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:29,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:29,118 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash 620344659, now seen corresponding path program 1 times [2020-10-27 01:19:29,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:29,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908916409] [2020-10-27 01:19:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:29,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:29,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:29,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:29,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:29,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:29,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:29,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:19:29,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:19:29,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-27 01:19:29,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:29,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:29,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:29,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:19:29,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:19:29,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:29,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:29,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:29,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:29,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:29,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:19:29,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:29,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:29,990 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 01:19:29,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908916409] [2020-10-27 01:19:29,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:29,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:19:29,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058315633] [2020-10-27 01:19:29,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:19:30,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:30,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:19:30,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:30,019 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2020-10-27 01:19:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:30,389 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-10-27 01:19:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:30,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:19:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:30,402 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:19:30,402 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:19:30,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:19:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:19:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-27 01:19:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:19:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-27 01:19:30,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 18 [2020-10-27 01:19:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:30,453 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-27 01:19:30,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:19:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-27 01:19:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:19:30,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:30,455 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:30,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:19:30,456 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:30,457 INFO L82 PathProgramCache]: Analyzing trace with hash -511611450, now seen corresponding path program 1 times [2020-10-27 01:19:30,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:30,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744870068] [2020-10-27 01:19:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:30,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:30,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:30,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:19:30,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:30,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 01:19:30,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:30,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:19:30,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:30,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:30,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:30,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:30,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:30,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:30,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:19:30,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:30,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:30,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:30,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:30,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:30,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744870068] [2020-10-27 01:19:30,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:30,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:19:30,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391194687] [2020-10-27 01:19:30,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:19:30,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:30,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:19:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:30,701 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-27 01:19:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:30,928 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-27 01:19:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:30,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 01:19:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:30,930 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:19:30,930 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:19:30,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:19:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:19:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-10-27 01:19:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:19:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-27 01:19:30,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2020-10-27 01:19:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:30,940 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-27 01:19:30,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:19:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-27 01:19:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:19:30,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:30,942 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:30,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:19:30,942 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash 680437702, now seen corresponding path program 1 times [2020-10-27 01:19:30,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:30,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832525258] [2020-10-27 01:19:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:30,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:31,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:31,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:19:31,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:31,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 01:19:31,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:31,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:31,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:31,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:19:31,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:31,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:31,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:31,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:31,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:31,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:31,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:19:31,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:31,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:31,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:31,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:31,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:31,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832525258] [2020-10-27 01:19:31,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:31,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:19:31,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540930787] [2020-10-27 01:19:31,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:19:31,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:19:31,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:31,150 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-10-27 01:19:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:31,371 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-27 01:19:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:31,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 01:19:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:31,373 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:19:31,373 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:19:31,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:19:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:19:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-27 01:19:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:19:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-27 01:19:31,381 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-10-27 01:19:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:31,382 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-27 01:19:31,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:19:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-27 01:19:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:19:31,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:31,383 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:31,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:19:31,383 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash 134346418, now seen corresponding path program 1 times [2020-10-27 01:19:31,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:31,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308182484] [2020-10-27 01:19:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:31,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:31,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:19:31,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:31,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-27 01:19:31,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:31,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:19:31,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:19:31,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:31,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:31,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:31,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:31,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:31,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:31,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:19:31,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:31,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:31,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:31,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308182484] [2020-10-27 01:19:31,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:31,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:19:31,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041702413] [2020-10-27 01:19:31,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:19:31,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:31,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:19:31,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:19:31,957 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2020-10-27 01:19:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:32,372 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-27 01:19:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:19:32,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:19:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:32,375 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:19:32,375 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:19:32,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:19:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-27 01:19:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:19:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-27 01:19:32,383 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 26 [2020-10-27 01:19:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:32,383 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-27 01:19:32,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:19:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-27 01:19:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:19:32,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:32,387 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:32,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:19:32,388 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:32,389 INFO L82 PathProgramCache]: Analyzing trace with hash 934657394, now seen corresponding path program 1 times [2020-10-27 01:19:32,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:32,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256255298] [2020-10-27 01:19:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:32,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:32,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:19:32,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:32,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 01:19:32,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:19:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:19:32,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:32,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:32,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:32,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:32,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:32,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:32,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:32,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:32,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256255298] [2020-10-27 01:19:32,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:32,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:19:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190154935] [2020-10-27 01:19:32,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:19:32,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:32,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:19:32,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:19:32,922 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-10-27 01:19:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:33,294 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-27 01:19:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:19:33,295 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:19:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:33,296 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:19:33,296 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:19:33,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:19:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-10-27 01:19:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:19:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-27 01:19:33,305 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2020-10-27 01:19:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:33,305 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-27 01:19:33,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:19:33,305 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-27 01:19:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:19:33,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:33,306 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:33,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:19:33,307 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash -226803475, now seen corresponding path program 1 times [2020-10-27 01:19:33,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:33,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915334422] [2020-10-27 01:19:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:33,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:33,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:33,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:19:33,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:33,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-27 01:19:33,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:33,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:33,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:19:33,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:33,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:33,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:33,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:33,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:33,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:33,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:19:33,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:33,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:33,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:33,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:33,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:33,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915334422] [2020-10-27 01:19:33,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:33,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:33,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244551512] [2020-10-27 01:19:33,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:33,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:33,639 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 10 states. [2020-10-27 01:19:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:34,019 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-27 01:19:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:34,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:19:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:34,022 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:19:34,022 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:19:34,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:19:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-27 01:19:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:19:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-27 01:19:34,054 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 28 [2020-10-27 01:19:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:34,054 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-27 01:19:34,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-27 01:19:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:19:34,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:34,057 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:34,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:19:34,057 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:34,058 INFO L82 PathProgramCache]: Analyzing trace with hash 600500328, now seen corresponding path program 2 times [2020-10-27 01:19:34,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:34,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071481756] [2020-10-27 01:19:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:34,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:19:34,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:34,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-27 01:19:34,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:34,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:34,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:34,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:19:34,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:34,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:34,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:34,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:34,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:34,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:34,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:34,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:34,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:34,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:34,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071481756] [2020-10-27 01:19:34,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:34,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:34,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311649683] [2020-10-27 01:19:34,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:34,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:34,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:34,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:34,427 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 10 states. [2020-10-27 01:19:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:34,776 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-27 01:19:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:34,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:19:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:34,779 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:19:34,780 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:19:34,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:19:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-27 01:19:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:19:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-27 01:19:34,800 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2020-10-27 01:19:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:34,801 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-27 01:19:34,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-27 01:19:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:19:34,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:34,804 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:34,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:19:34,804 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:34,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash 595516520, now seen corresponding path program 1 times [2020-10-27 01:19:34,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:34,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239321609] [2020-10-27 01:19:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:35,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:35,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:19:35,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:35,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-27 01:19:35,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:19:35,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:35,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:35,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:35,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:35,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:35,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:35,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:35,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:35,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:35,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:35,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:35,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239321609] [2020-10-27 01:19:35,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:35,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:35,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450513159] [2020-10-27 01:19:35,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:35,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:35,414 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2020-10-27 01:19:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:35,740 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-27 01:19:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:35,741 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:19:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:35,742 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:19:35,742 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:19:35,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:19:35,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-27 01:19:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:19:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-27 01:19:35,755 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 30 [2020-10-27 01:19:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:35,755 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-27 01:19:35,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-27 01:19:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:19:35,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:35,757 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:35,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:19:35,757 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:35,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1043096551, now seen corresponding path program 2 times [2020-10-27 01:19:35,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:35,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988654218] [2020-10-27 01:19:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:36,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:36,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:19:36,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:36,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-27 01:19:36,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:19:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:19:36,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:36,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:36,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:36,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:36,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:36,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:36,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:36,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:36,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:36,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:36,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:36,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:36,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988654218] [2020-10-27 01:19:36,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:36,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:19:36,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518138346] [2020-10-27 01:19:36,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:19:36,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:19:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:19:36,236 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 11 states. [2020-10-27 01:19:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:36,521 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-27 01:19:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:36,522 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:19:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:36,523 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:19:36,523 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:19:36,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:19:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-10-27 01:19:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:19:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-27 01:19:36,539 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 30 [2020-10-27 01:19:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:36,540 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-27 01:19:36,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:19:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-27 01:19:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:19:36,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:36,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:36,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:19:36,544 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:36,546 INFO L82 PathProgramCache]: Analyzing trace with hash -792329511, now seen corresponding path program 1 times [2020-10-27 01:19:36,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:36,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655131989] [2020-10-27 01:19:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:36,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:36,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:36,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:19:36,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:36,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 01:19:36,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:19:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:19:36,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:37,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:37,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:37,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:37,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:37,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:37,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:37,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:37,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:37,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:37,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:37,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655131989] [2020-10-27 01:19:37,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:37,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:19:37,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322121398] [2020-10-27 01:19:37,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:19:37,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:19:37,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:19:37,028 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 11 states. [2020-10-27 01:19:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:37,286 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-27 01:19:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:19:37,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:19:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:37,287 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:19:37,287 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:19:37,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:19:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:19:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:19:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:19:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-27 01:19:37,295 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 30 [2020-10-27 01:19:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:37,296 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-27 01:19:37,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:19:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-27 01:19:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:19:37,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:37,297 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:37,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:19:37,298 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:37,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2121869460, now seen corresponding path program 3 times [2020-10-27 01:19:37,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:37,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146531976] [2020-10-27 01:19:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:37,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:37,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:37,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:19:37,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:37,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 01:19:37,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:19:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:19:37,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:37,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:37,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:37,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:37,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:37,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:37,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:37,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:37,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:37,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:37,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:37,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:19:37,842 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 01:19:37,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146531976] [2020-10-27 01:19:37,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:37,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:19:37,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251999044] [2020-10-27 01:19:37,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:19:37,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:37,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:19:37,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:19:37,845 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 12 states. [2020-10-27 01:19:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:38,642 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-27 01:19:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:19:38,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:19:38,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:38,645 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:19:38,645 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 01:19:38,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:19:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 01:19:38,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-10-27 01:19:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:19:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-27 01:19:38,660 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 32 [2020-10-27 01:19:38,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:38,661 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-27 01:19:38,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:19:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-27 01:19:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:19:38,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:38,664 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:38,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:19:38,664 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:38,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:38,665 INFO L82 PathProgramCache]: Analyzing trace with hash -212389868, now seen corresponding path program 1 times [2020-10-27 01:19:38,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:38,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360602567] [2020-10-27 01:19:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:38,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:38,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:38,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:19:38,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:38,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 01:19:38,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:19:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:38,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:19:38,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:39,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:39,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:39,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:39,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:39,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:39,168 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 01:19:39,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360602567] [2020-10-27 01:19:39,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:39,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:19:39,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866232614] [2020-10-27 01:19:39,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:19:39,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:39,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:19:39,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:19:39,170 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 12 states. [2020-10-27 01:19:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:39,724 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-10-27 01:19:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:19:39,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:19:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:39,726 INFO L225 Difference]: With dead ends: 95 [2020-10-27 01:19:39,726 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:19:39,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:19:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:19:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-27 01:19:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:19:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-27 01:19:39,735 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 32 [2020-10-27 01:19:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:39,736 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-27 01:19:39,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:19:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-27 01:19:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:19:39,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:39,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:39,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:19:39,738 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1477606833, now seen corresponding path program 4 times [2020-10-27 01:19:39,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:39,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631076887] [2020-10-27 01:19:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:39,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:40,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:40,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:19:40,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:40,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 01:19:40,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:19:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:19:40,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:40,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:40,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:40,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:40,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:40,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:40,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:40,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:40,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:40,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:40,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:40,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:40,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631076887] [2020-10-27 01:19:40,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:40,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:19:40,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259802866] [2020-10-27 01:19:40,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:19:40,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:19:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:19:40,370 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 13 states. [2020-10-27 01:19:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:41,014 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-10-27 01:19:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:19:41,014 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-27 01:19:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:41,016 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:19:41,016 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:19:41,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:19:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:19:41,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-10-27 01:19:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:19:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-10-27 01:19:41,034 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 34 [2020-10-27 01:19:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:41,035 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-10-27 01:19:41,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:19:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-10-27 01:19:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:19:41,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:41,036 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:41,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:19:41,037 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1169316170, now seen corresponding path program 5 times [2020-10-27 01:19:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:41,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356945077] [2020-10-27 01:19:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:41,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:41,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:41,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:19:41,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:41,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-27 01:19:41,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:19:41,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:41,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:19:41,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:41,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:41,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:41,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:41,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:41,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:41,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:19:41,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:41,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:41,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:41,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:19:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:41,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356945077] [2020-10-27 01:19:41,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:41,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:19:41,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466970145] [2020-10-27 01:19:41,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:19:41,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:19:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:19:41,742 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 13 states. [2020-10-27 01:19:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:42,385 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2020-10-27 01:19:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:19:42,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 01:19:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:42,387 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:19:42,387 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:19:42,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:19:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:19:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-27 01:19:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:19:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-27 01:19:42,396 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 36 [2020-10-27 01:19:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:42,396 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-27 01:19:42,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:19:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-27 01:19:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:19:42,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:42,397 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:42,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:19:42,398 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:42,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1866893130, now seen corresponding path program 2 times [2020-10-27 01:19:42,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:42,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172252461] [2020-10-27 01:19:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:42,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:42,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:42,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:42,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:42,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:43,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:43,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:19:43,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:19:43,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1386 [2020-10-27 01:19:43,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:43,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:19:43,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:43,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:19:43,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:44,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:44,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:44,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:44,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:44,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:44,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:44,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:44,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:19:44,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172252461] [2020-10-27 01:19:44,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:44,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:19:44,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21107118] [2020-10-27 01:19:44,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:19:44,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:19:44,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:19:44,183 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 12 states. [2020-10-27 01:19:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:44,699 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-27 01:19:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:19:44,700 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-27 01:19:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:44,701 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:19:44,701 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:19:44,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:19:44,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:19:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-10-27 01:19:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:19:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2020-10-27 01:19:44,715 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 36 [2020-10-27 01:19:44,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:44,715 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2020-10-27 01:19:44,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:19:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2020-10-27 01:19:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:19:44,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:44,718 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:44,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:19:44,718 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:44,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2074286917, now seen corresponding path program 6 times [2020-10-27 01:19:44,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:44,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512375664] [2020-10-27 01:19:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:44,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:45,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:45,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:19:45,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:45,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-27 01:19:45,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:45,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:19:45,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:45,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:19:45,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:45,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:45,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:45,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:45,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:45,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:45,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:45,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:45,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:45,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512375664] [2020-10-27 01:19:45,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:45,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:19:45,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293158810] [2020-10-27 01:19:45,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:19:45,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:45,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:19:45,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:19:45,778 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 14 states. [2020-10-27 01:19:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:46,645 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-10-27 01:19:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:46,646 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 01:19:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:46,647 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:19:46,647 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:19:46,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:19:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:19:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-10-27 01:19:46,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:19:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-10-27 01:19:46,660 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 36 [2020-10-27 01:19:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:46,661 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-10-27 01:19:46,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:19:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-10-27 01:19:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:19:46,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:46,662 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:46,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:19:46,662 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2064345910, now seen corresponding path program 2 times [2020-10-27 01:19:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:46,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960295669] [2020-10-27 01:19:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:46,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:46,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:46,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:19:46,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:46,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-27 01:19:46,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:19:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:19:46,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:47,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:47,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:47,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:47,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:47,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:47,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:47,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:47,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960295669] [2020-10-27 01:19:47,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:47,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:19:47,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892911753] [2020-10-27 01:19:47,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:19:47,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:47,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:19:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:19:47,458 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 13 states. [2020-10-27 01:19:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:47,995 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2020-10-27 01:19:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:19:47,996 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 01:19:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:47,997 INFO L225 Difference]: With dead ends: 107 [2020-10-27 01:19:47,997 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:19:47,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:19:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:19:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2020-10-27 01:19:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:19:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-27 01:19:48,005 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 36 [2020-10-27 01:19:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:48,005 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-27 01:19:48,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:19:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-27 01:19:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:19:48,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:48,011 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:48,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:19:48,012 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash -518509509, now seen corresponding path program 1 times [2020-10-27 01:19:48,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:48,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9516947] [2020-10-27 01:19:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:48,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:48,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:48,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:19:48,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:48,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-27 01:19:48,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:48,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:19:48,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:48,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:19:48,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:48,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:48,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:48,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:48,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:48,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:48,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:48,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:48,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:48,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:48,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:48,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:48,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9516947] [2020-10-27 01:19:48,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:48,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:19:48,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198499089] [2020-10-27 01:19:48,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:19:48,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:19:48,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:19:48,874 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 14 states. [2020-10-27 01:19:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:49,520 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-10-27 01:19:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:19:49,520 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 01:19:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:49,521 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:19:49,522 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:19:49,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:19:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:19:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-10-27 01:19:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:19:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-10-27 01:19:49,530 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 36 [2020-10-27 01:19:49,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:49,530 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-10-27 01:19:49,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:19:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-10-27 01:19:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:19:49,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:49,531 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:49,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:19:49,531 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:49,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1009594186, now seen corresponding path program 7 times [2020-10-27 01:19:49,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:49,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24525782] [2020-10-27 01:19:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:49,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:49,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:49,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:19:49,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:49,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-27 01:19:49,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:49,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:19:49,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:49,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:19:49,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:50,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:50,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:50,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:50,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:50,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:50,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:19:50,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:50,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:50,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24525782] [2020-10-27 01:19:50,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:50,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:19:50,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178146272] [2020-10-27 01:19:50,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:19:50,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:50,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:19:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:50,376 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 15 states. [2020-10-27 01:19:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:51,436 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2020-10-27 01:19:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:19:51,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 01:19:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:51,438 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:19:51,438 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:19:51,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:19:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:19:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2020-10-27 01:19:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:19:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2020-10-27 01:19:51,456 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 38 [2020-10-27 01:19:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:51,456 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2020-10-27 01:19:51,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:19:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2020-10-27 01:19:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:19:51,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:51,457 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:51,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:19:51,457 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:51,458 INFO L82 PathProgramCache]: Analyzing trace with hash 886692086, now seen corresponding path program 3 times [2020-10-27 01:19:51,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:51,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371610816] [2020-10-27 01:19:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:51,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:51,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:51,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:19:51,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:51,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-27 01:19:51,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:19:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:19:51,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:52,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:52,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:52,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:52,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:52,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:52,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:19:52,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:52,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:52,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371610816] [2020-10-27 01:19:52,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:52,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:19:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574153096] [2020-10-27 01:19:52,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:19:52,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:19:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:52,497 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 15 states. [2020-10-27 01:19:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:53,449 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2020-10-27 01:19:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:19:53,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 01:19:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:53,453 INFO L225 Difference]: With dead ends: 133 [2020-10-27 01:19:53,453 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:19:53,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:19:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:19:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2020-10-27 01:19:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 01:19:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2020-10-27 01:19:53,472 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 38 [2020-10-27 01:19:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:53,472 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2020-10-27 01:19:53,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:19:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2020-10-27 01:19:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:19:53,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:53,473 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:53,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:19:53,473 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash -42096143, now seen corresponding path program 8 times [2020-10-27 01:19:53,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:53,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937118984] [2020-10-27 01:19:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:53,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:54,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:54,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:19:54,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:54,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-27 01:19:54,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:19:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:19:54,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:54,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:54,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:54,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:54,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:54,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:54,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:54,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:54,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:54,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:54,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:54,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:54,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937118984] [2020-10-27 01:19:54,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:54,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:19:54,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051347529] [2020-10-27 01:19:54,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:19:54,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:54,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:19:54,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:19:54,661 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand 16 states. [2020-10-27 01:19:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:55,607 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2020-10-27 01:19:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:55,607 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 01:19:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:55,609 INFO L225 Difference]: With dead ends: 139 [2020-10-27 01:19:55,609 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:19:55,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:19:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:19:55,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2020-10-27 01:19:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:19:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2020-10-27 01:19:55,623 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 40 [2020-10-27 01:19:55,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:55,623 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2020-10-27 01:19:55,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:19:55,623 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2020-10-27 01:19:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:19:55,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:55,624 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:55,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:19:55,624 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1009268066, now seen corresponding path program 9 times [2020-10-27 01:19:55,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:55,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17098254] [2020-10-27 01:19:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:55,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:19:56,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:56,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-27 01:19:56,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:19:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:19:56,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:56,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:56,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:56,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:56,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:56,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:56,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:56,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:56,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:19:56,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17098254] [2020-10-27 01:19:56,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:56,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:19:56,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843558389] [2020-10-27 01:19:56,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:19:56,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:56,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:19:56,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:56,660 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 15 states. [2020-10-27 01:19:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:57,175 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2020-10-27 01:19:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:19:57,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-27 01:19:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:57,180 INFO L225 Difference]: With dead ends: 135 [2020-10-27 01:19:57,180 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:19:57,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:19:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:19:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2020-10-27 01:19:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:19:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2020-10-27 01:19:57,191 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 40 [2020-10-27 01:19:57,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:57,191 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2020-10-27 01:19:57,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:19:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2020-10-27 01:19:57,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:19:57,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:57,192 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:57,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:19:57,192 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:57,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:57,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2010587244, now seen corresponding path program 10 times [2020-10-27 01:19:57,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:57,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801127321] [2020-10-27 01:19:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:57,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:57,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:57,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:19:57,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:57,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 484 [2020-10-27 01:19:57,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:19:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:57,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:19:57,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:58,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:58,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:58,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:58,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:58,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:58,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:58,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:58,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:58,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801127321] [2020-10-27 01:19:58,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:58,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:19:58,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310201956] [2020-10-27 01:19:58,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:19:58,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:58,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:19:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:19:58,337 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 16 states. [2020-10-27 01:19:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:59,551 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2020-10-27 01:19:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:59,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-27 01:19:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:59,553 INFO L225 Difference]: With dead ends: 145 [2020-10-27 01:19:59,553 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:19:59,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:19:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:19:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2020-10-27 01:19:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:19:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-27 01:19:59,563 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 42 [2020-10-27 01:19:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:59,563 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-27 01:19:59,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:19:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-27 01:19:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:19:59,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:59,564 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:59,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:19:59,565 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:59,565 INFO L82 PathProgramCache]: Analyzing trace with hash -735770516, now seen corresponding path program 3 times [2020-10-27 01:19:59,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:59,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635561664] [2020-10-27 01:19:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:59,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:59,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:59,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:00,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:01,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:01,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:04,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:04,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:20:04,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:20:04,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4440 [2020-10-27 01:20:04,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:04,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:20:04,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:04,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:20:04,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:04,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:04,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:04,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:04,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:04,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:04,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:04,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:04,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:04,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:04,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:20:04,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635561664] [2020-10-27 01:20:04,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:04,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:20:04,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791355862] [2020-10-27 01:20:04,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:20:04,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:04,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:20:04,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:20:04,537 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 15 states. [2020-10-27 01:20:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:05,339 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2020-10-27 01:20:05,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:20:05,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-27 01:20:05,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:05,341 INFO L225 Difference]: With dead ends: 129 [2020-10-27 01:20:05,341 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:20:05,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:20:05,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:20:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2020-10-27 01:20:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:20:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2020-10-27 01:20:05,352 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 42 [2020-10-27 01:20:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:05,352 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2020-10-27 01:20:05,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:20:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2020-10-27 01:20:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:20:05,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:05,353 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:05,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:20:05,355 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1240689763, now seen corresponding path program 11 times [2020-10-27 01:20:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:05,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822110752] [2020-10-27 01:20:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:05,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:05,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:20:05,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:05,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-27 01:20:05,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:20:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:20:05,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:06,433 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-27 01:20:06,570 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 01:20:06,710 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-27 01:20:06,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:06,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:06,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:06,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:06,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:20:06,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:06,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:06,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:06,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:06,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:06,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822110752] [2020-10-27 01:20:06,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:06,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:20:06,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703800481] [2020-10-27 01:20:06,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:20:06,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:06,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:20:06,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:20:06,955 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand 17 states. [2020-10-27 01:20:07,923 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 01:20:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:08,498 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2020-10-27 01:20:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:20:08,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-27 01:20:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:08,501 INFO L225 Difference]: With dead ends: 149 [2020-10-27 01:20:08,501 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 01:20:08,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:20:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 01:20:08,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 125. [2020-10-27 01:20:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:20:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 141 transitions. [2020-10-27 01:20:08,511 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 141 transitions. Word has length 42 [2020-10-27 01:20:08,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:08,511 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 141 transitions. [2020-10-27 01:20:08,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:20:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 141 transitions. [2020-10-27 01:20:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:20:08,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:08,512 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:08,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:20:08,513 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2125202260, now seen corresponding path program 4 times [2020-10-27 01:20:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:08,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929754974] [2020-10-27 01:20:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:08,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:08,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:08,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:20:08,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:08,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-27 01:20:08,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:08,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:20:08,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:08,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:20:08,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:09,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:09,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:09,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:09,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:09,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:09,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:20:09,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:09,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:09,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:09,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:09,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:09,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929754974] [2020-10-27 01:20:09,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:09,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:20:09,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762190533] [2020-10-27 01:20:09,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:20:09,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:09,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:20:09,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:20:09,577 INFO L87 Difference]: Start difference. First operand 125 states and 141 transitions. Second operand 16 states. [2020-10-27 01:20:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:10,692 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2020-10-27 01:20:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:20:10,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-27 01:20:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:10,696 INFO L225 Difference]: With dead ends: 149 [2020-10-27 01:20:10,697 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:20:10,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:20:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:20:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 120. [2020-10-27 01:20:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:20:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2020-10-27 01:20:10,715 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 42 [2020-10-27 01:20:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:10,716 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2020-10-27 01:20:10,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:20:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2020-10-27 01:20:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:20:10,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:10,717 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:10,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:20:10,717 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1659861981, now seen corresponding path program 2 times [2020-10-27 01:20:10,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:10,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921468459] [2020-10-27 01:20:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:10,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:11,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:11,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:20:11,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:11,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-27 01:20:11,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:11,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:20:11,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:11,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:20:11,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:11,728 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-27 01:20:12,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:12,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:12,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:12,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:12,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:12,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:20:12,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:12,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:12,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921468459] [2020-10-27 01:20:12,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:12,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:20:12,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792580653] [2020-10-27 01:20:12,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:20:12,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:12,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:20:12,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:20:12,052 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand 17 states. [2020-10-27 01:20:13,113 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-27 01:20:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:13,530 INFO L93 Difference]: Finished difference Result 145 states and 163 transitions. [2020-10-27 01:20:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:20:13,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-27 01:20:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:13,532 INFO L225 Difference]: With dead ends: 145 [2020-10-27 01:20:13,532 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:20:13,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:20:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:20:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2020-10-27 01:20:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:20:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2020-10-27 01:20:13,543 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 42 [2020-10-27 01:20:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:13,543 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2020-10-27 01:20:13,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:20:13,543 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2020-10-27 01:20:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:20:13,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:13,544 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:13,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:20:13,545 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1213353752, now seen corresponding path program 12 times [2020-10-27 01:20:13,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:13,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237316562] [2020-10-27 01:20:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:13,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:14,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:14,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:20:14,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:14,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-27 01:20:14,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:14,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:20:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:20:14,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:14,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:14,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:14,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:14,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:14,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:14,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:14,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:14,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:14,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237316562] [2020-10-27 01:20:14,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:14,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:20:14,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236353339] [2020-10-27 01:20:14,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:20:14,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:14,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:20:14,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:20:14,911 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand 18 states. [2020-10-27 01:20:15,898 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-27 01:20:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:16,568 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2020-10-27 01:20:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:20:16,569 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-27 01:20:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:16,570 INFO L225 Difference]: With dead ends: 170 [2020-10-27 01:20:16,570 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 01:20:16,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:20:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 01:20:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 142. [2020-10-27 01:20:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 01:20:16,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2020-10-27 01:20:16,583 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 44 [2020-10-27 01:20:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:16,584 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2020-10-27 01:20:16,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:20:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2020-10-27 01:20:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:20:16,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:16,585 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:16,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:20:16,585 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:16,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1424156648, now seen corresponding path program 5 times [2020-10-27 01:20:16,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:16,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186541866] [2020-10-27 01:20:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:16,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:17,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:17,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:20:17,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:17,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-27 01:20:17,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:20:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:17,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:20:17,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:17,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:17,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:17,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:17,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:17,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:17,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:17,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:17,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:17,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:17,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186541866] [2020-10-27 01:20:17,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:17,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:20:17,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203082139] [2020-10-27 01:20:17,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:20:17,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:17,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:20:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:20:17,906 INFO L87 Difference]: Start difference. First operand 142 states and 160 transitions. Second operand 18 states. [2020-10-27 01:20:19,145 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-27 01:20:19,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:19,828 INFO L93 Difference]: Finished difference Result 177 states and 199 transitions. [2020-10-27 01:20:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:20:19,828 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-27 01:20:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:19,830 INFO L225 Difference]: With dead ends: 177 [2020-10-27 01:20:19,830 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:20:19,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:20:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:20:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 151. [2020-10-27 01:20:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 01:20:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2020-10-27 01:20:19,844 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 44 [2020-10-27 01:20:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:19,844 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2020-10-27 01:20:19,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:20:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2020-10-27 01:20:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:20:19,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:19,846 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:19,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:20:19,846 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:19,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1612126163, now seen corresponding path program 13 times [2020-10-27 01:20:19,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:19,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052777750] [2020-10-27 01:20:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:20,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:20,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:20:20,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:20,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-27 01:20:20,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:20:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:20:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:21,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:21,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:21,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:21,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:21,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:21,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:21,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:21,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:21,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:21,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052777750] [2020-10-27 01:20:21,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:21,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:20:21,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423451824] [2020-10-27 01:20:21,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:20:21,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:20:21,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:20:21,382 INFO L87 Difference]: Start difference. First operand 151 states and 171 transitions. Second operand 19 states. [2020-10-27 01:20:22,416 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-27 01:20:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:23,362 INFO L93 Difference]: Finished difference Result 189 states and 212 transitions. [2020-10-27 01:20:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:20:23,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-27 01:20:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:23,364 INFO L225 Difference]: With dead ends: 189 [2020-10-27 01:20:23,365 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 01:20:23,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:20:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 01:20:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 161. [2020-10-27 01:20:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:20:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2020-10-27 01:20:23,388 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 46 [2020-10-27 01:20:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:23,389 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2020-10-27 01:20:23,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:20:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2020-10-27 01:20:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:20:23,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:23,390 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:23,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:20:23,390 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:23,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:23,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1639150844, now seen corresponding path program 14 times [2020-10-27 01:20:23,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:23,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916020944] [2020-10-27 01:20:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:23,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:23,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:23,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:20:23,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:23,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-27 01:20:23,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:20:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:23,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:20:23,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:24,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:24,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:24,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:24,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:24,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:24,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:20:24,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:24,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:24,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:20:24,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916020944] [2020-10-27 01:20:24,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:24,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:20:24,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980327334] [2020-10-27 01:20:24,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:20:24,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:24,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:20:24,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:20:24,640 INFO L87 Difference]: Start difference. First operand 161 states and 182 transitions. Second operand 18 states. [2020-10-27 01:20:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:26,008 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2020-10-27 01:20:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:20:26,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-27 01:20:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:26,010 INFO L225 Difference]: With dead ends: 185 [2020-10-27 01:20:26,011 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 01:20:26,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:20:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 01:20:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2020-10-27 01:20:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:20:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2020-10-27 01:20:26,026 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 46 [2020-10-27 01:20:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:26,026 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2020-10-27 01:20:26,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:20:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2020-10-27 01:20:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:26,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:26,027 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:26,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:20:26,028 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1714643506, now seen corresponding path program 15 times [2020-10-27 01:20:26,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:26,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971866865] [2020-10-27 01:20:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:26,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:26,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:26,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:20:26,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:26,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-27 01:20:26,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:26,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:20:26,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:26,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:20:26,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:27,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:27,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:27,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:27,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:27,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:27,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:27,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:27,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:27,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971866865] [2020-10-27 01:20:27,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:27,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:20:27,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151867231] [2020-10-27 01:20:27,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:20:27,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:27,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:20:27,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:20:27,639 INFO L87 Difference]: Start difference. First operand 161 states and 182 transitions. Second operand 19 states. [2020-10-27 01:20:28,667 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 01:20:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:29,575 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2020-10-27 01:20:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:20:29,575 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-27 01:20:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:29,577 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:20:29,577 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 01:20:29,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:20:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 01:20:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2020-10-27 01:20:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:20:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2020-10-27 01:20:29,592 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 48 [2020-10-27 01:20:29,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:29,592 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2020-10-27 01:20:29,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:20:29,592 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2020-10-27 01:20:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:29,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:29,593 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:29,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:20:29,594 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:29,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1632485326, now seen corresponding path program 4 times [2020-10-27 01:20:29,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:29,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905857966] [2020-10-27 01:20:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:29,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:29,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:29,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:30,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:30,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:32,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:32,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:32,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:32,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:34,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:34,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:20:34,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:20:34,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:20:34,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:34,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:20:34,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:34,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:20:34,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:35,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:35,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:35,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:35,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:35,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:35,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 01:20:35,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905857966] [2020-10-27 01:20:35,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:35,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:20:35,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377750210] [2020-10-27 01:20:35,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:20:35,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:35,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:20:35,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:20:35,091 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand 16 states. [2020-10-27 01:20:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:35,753 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2020-10-27 01:20:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:20:35,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-27 01:20:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:35,755 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:20:35,755 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:20:35,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:20:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:20:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-27 01:20:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:20:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2020-10-27 01:20:35,770 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 48 [2020-10-27 01:20:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:35,770 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2020-10-27 01:20:35,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:20:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2020-10-27 01:20:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:35,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:35,771 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:35,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:20:35,771 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash 544344255, now seen corresponding path program 16 times [2020-10-27 01:20:35,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:35,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759421363] [2020-10-27 01:20:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:35,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:36,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:36,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:20:36,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:36,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-27 01:20:36,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:20:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:20:36,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:36,961 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 01:20:37,155 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-27 01:20:37,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:37,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:37,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:37,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:37,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:37,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:20:37,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:37,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:37,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759421363] [2020-10-27 01:20:37,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:37,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:20:37,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654768753] [2020-10-27 01:20:37,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:20:37,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:37,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:20:37,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:20:37,615 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 20 states. [2020-10-27 01:20:38,309 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-27 01:20:38,711 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-27 01:20:38,922 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-27 01:20:39,115 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-27 01:20:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:39,788 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2020-10-27 01:20:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:20:39,789 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-27 01:20:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:39,790 INFO L225 Difference]: With dead ends: 212 [2020-10-27 01:20:39,790 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 01:20:39,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:20:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 01:20:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 175. [2020-10-27 01:20:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 01:20:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 197 transitions. [2020-10-27 01:20:39,822 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 197 transitions. Word has length 48 [2020-10-27 01:20:39,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:39,822 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 197 transitions. [2020-10-27 01:20:39,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:20:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 197 transitions. [2020-10-27 01:20:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:39,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:39,823 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:39,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:20:39,824 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1255378254, now seen corresponding path program 3 times [2020-10-27 01:20:39,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:39,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744745604] [2020-10-27 01:20:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:39,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:40,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:40,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:42,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:42,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:20:42,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:20:42,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3044 [2020-10-27 01:20:42,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:20:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:20:42,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:43,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:43,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:43,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:43,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:43,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:43,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:43,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:43,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:43,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:43,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:20:43,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744745604] [2020-10-27 01:20:43,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:43,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:20:43,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983021126] [2020-10-27 01:20:43,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:20:43,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:43,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:20:43,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:20:43,657 INFO L87 Difference]: Start difference. First operand 175 states and 197 transitions. Second operand 17 states. [2020-10-27 01:20:44,529 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-27 01:20:44,716 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-27 01:20:44,906 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-27 01:20:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:45,402 INFO L93 Difference]: Finished difference Result 202 states and 225 transitions. [2020-10-27 01:20:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:20:45,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-27 01:20:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:45,404 INFO L225 Difference]: With dead ends: 202 [2020-10-27 01:20:45,404 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 01:20:45,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:20:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 01:20:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2020-10-27 01:20:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 01:20:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2020-10-27 01:20:45,423 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 48 [2020-10-27 01:20:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:45,423 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2020-10-27 01:20:45,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:20:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2020-10-27 01:20:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:45,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:45,424 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:45,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:20:45,424 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1643871218, now seen corresponding path program 4 times [2020-10-27 01:20:45,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:45,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743978884] [2020-10-27 01:20:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:45,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:45,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:46,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:46,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:20:46,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:20:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-27 01:20:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:20:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:20:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:47,124 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 01:20:47,272 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-27 01:20:47,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:47,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:47,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:47,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:47,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:47,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:47,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:47,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:47,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:47,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:47,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:20:47,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743978884] [2020-10-27 01:20:47,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:47,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:20:47,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835787554] [2020-10-27 01:20:47,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:20:47,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:20:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:20:47,617 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand 18 states. [2020-10-27 01:20:48,521 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:20:48,898 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-27 01:20:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:49,473 INFO L93 Difference]: Finished difference Result 202 states and 224 transitions. [2020-10-27 01:20:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:20:49,474 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-27 01:20:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:49,476 INFO L225 Difference]: With dead ends: 202 [2020-10-27 01:20:49,476 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 01:20:49,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:20:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 01:20:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2020-10-27 01:20:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 01:20:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2020-10-27 01:20:49,491 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 48 [2020-10-27 01:20:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:49,492 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2020-10-27 01:20:49,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:20:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2020-10-27 01:20:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:49,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:49,493 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:49,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:20:49,493 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1749099826, now seen corresponding path program 6 times [2020-10-27 01:20:49,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:49,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369992015] [2020-10-27 01:20:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:49,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:50,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:50,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:20:50,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-27 01:20:50,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:20:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:20:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:51,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:51,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:51,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:51,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:51,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:51,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:51,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:51,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:51,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:51,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:51,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:51,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369992015] [2020-10-27 01:20:51,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:51,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:20:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292176114] [2020-10-27 01:20:51,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:20:51,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:20:51,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:20:51,147 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand 19 states. [2020-10-27 01:20:52,104 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-27 01:20:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:52,819 INFO L93 Difference]: Finished difference Result 199 states and 220 transitions. [2020-10-27 01:20:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:20:52,819 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-27 01:20:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:52,821 INFO L225 Difference]: With dead ends: 199 [2020-10-27 01:20:52,821 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 01:20:52,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:20:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 01:20:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 170. [2020-10-27 01:20:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-27 01:20:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 189 transitions. [2020-10-27 01:20:52,835 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 189 transitions. Word has length 48 [2020-10-27 01:20:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:52,835 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 189 transitions. [2020-10-27 01:20:52,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:20:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 189 transitions. [2020-10-27 01:20:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:52,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:52,836 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:52,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:20:52,836 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:52,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2139663937, now seen corresponding path program 5 times [2020-10-27 01:20:52,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:52,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474154602] [2020-10-27 01:20:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:52,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:53,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:53,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:20:53,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:53,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-27 01:20:53,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:20:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:20:53,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:54,043 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-27 01:20:54,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:54,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:54,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:54,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:54,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:54,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:54,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:54,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:54,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474154602] [2020-10-27 01:20:54,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:54,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:20:54,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373906683] [2020-10-27 01:20:54,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:20:54,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:20:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:20:54,544 INFO L87 Difference]: Start difference. First operand 170 states and 189 transitions. Second operand 20 states. [2020-10-27 01:20:55,811 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-27 01:20:56,034 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-27 01:20:56,263 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-27 01:20:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:56,828 INFO L93 Difference]: Finished difference Result 195 states and 216 transitions. [2020-10-27 01:20:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:20:56,829 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-27 01:20:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:56,830 INFO L225 Difference]: With dead ends: 195 [2020-10-27 01:20:56,830 INFO L226 Difference]: Without dead ends: 187 [2020-10-27 01:20:56,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:20:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-27 01:20:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2020-10-27 01:20:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 01:20:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 197 transitions. [2020-10-27 01:20:56,846 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 197 transitions. Word has length 48 [2020-10-27 01:20:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:56,846 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 197 transitions. [2020-10-27 01:20:56,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:20:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 197 transitions. [2020-10-27 01:20:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:20:56,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:56,848 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:56,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:20:56,848 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:56,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1355873350, now seen corresponding path program 17 times [2020-10-27 01:20:56,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:56,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920073645] [2020-10-27 01:20:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:56,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:57,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:57,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:20:57,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:57,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-27 01:20:57,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:57,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:20:57,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:57,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:20:57,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:58,352 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-27 01:20:58,659 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-27 01:20:58,916 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 01:20:59,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:59,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:59,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:59,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:59,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:59,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:59,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920073645] [2020-10-27 01:20:59,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:59,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:20:59,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210876914] [2020-10-27 01:20:59,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:20:59,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:59,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:20:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:20:59,266 INFO L87 Difference]: Start difference. First operand 177 states and 197 transitions. Second operand 21 states. [2020-10-27 01:20:59,991 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-27 01:21:00,180 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-27 01:21:00,782 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-27 01:21:01,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:01,671 INFO L93 Difference]: Finished difference Result 226 states and 249 transitions. [2020-10-27 01:21:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:21:01,671 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-27 01:21:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:01,673 INFO L225 Difference]: With dead ends: 226 [2020-10-27 01:21:01,673 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 01:21:01,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:21:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 01:21:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 194. [2020-10-27 01:21:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 01:21:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 216 transitions. [2020-10-27 01:21:01,689 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 216 transitions. Word has length 50 [2020-10-27 01:21:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:01,690 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 216 transitions. [2020-10-27 01:21:01,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:21:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 216 transitions. [2020-10-27 01:21:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:21:01,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:01,691 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:01,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:21:01,691 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:01,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1475628410, now seen corresponding path program 7 times [2020-10-27 01:21:01,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:01,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281490563] [2020-10-27 01:21:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:01,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:02,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:02,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:21:02,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-27 01:21:02,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:21:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:21:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:02,854 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-27 01:21:03,047 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-27 01:21:03,318 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 01:21:03,558 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 01:21:03,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:03,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:03,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:03,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:03,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:03,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:03,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:03,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:03,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:03,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:03,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:03,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281490563] [2020-10-27 01:21:03,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:03,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:21:03,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963510718] [2020-10-27 01:21:03,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:21:03,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:03,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:21:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:21:03,966 INFO L87 Difference]: Start difference. First operand 194 states and 216 transitions. Second operand 21 states. [2020-10-27 01:21:05,041 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-27 01:21:05,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:05,903 INFO L93 Difference]: Finished difference Result 229 states and 254 transitions. [2020-10-27 01:21:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:21:05,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-27 01:21:05,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:05,906 INFO L225 Difference]: With dead ends: 229 [2020-10-27 01:21:05,906 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 01:21:05,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:21:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 01:21:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 203. [2020-10-27 01:21:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 01:21:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 227 transitions. [2020-10-27 01:21:05,929 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 227 transitions. Word has length 50 [2020-10-27 01:21:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:05,930 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 227 transitions. [2020-10-27 01:21:05,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:21:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 227 transitions. [2020-10-27 01:21:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:21:05,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:05,931 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:05,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:21:05,931 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:05,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:05,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2103890955, now seen corresponding path program 18 times [2020-10-27 01:21:05,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:05,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034951376] [2020-10-27 01:21:05,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:06,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:06,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:06,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:21:06,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:06,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-10-27 01:21:06,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:06,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:21:06,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:06,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:21:06,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:07,467 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 01:21:07,745 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 01:21:07,912 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-27 01:21:08,075 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-27 01:21:08,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:08,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:08,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:08,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:08,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:08,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:08,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:08,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:08,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:08,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:08,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034951376] [2020-10-27 01:21:08,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:08,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:21:08,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921476616] [2020-10-27 01:21:08,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:21:08,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:08,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:21:08,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:21:08,769 INFO L87 Difference]: Start difference. First operand 203 states and 227 transitions. Second operand 22 states. [2020-10-27 01:21:09,319 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-27 01:21:09,782 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 01:21:10,006 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 01:21:10,307 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-27 01:21:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:11,570 INFO L93 Difference]: Finished difference Result 247 states and 273 transitions. [2020-10-27 01:21:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:21:11,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-27 01:21:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:11,573 INFO L225 Difference]: With dead ends: 247 [2020-10-27 01:21:11,574 INFO L226 Difference]: Without dead ends: 241 [2020-10-27 01:21:11,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:21:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-27 01:21:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 215. [2020-10-27 01:21:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 01:21:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions. [2020-10-27 01:21:11,599 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 52 [2020-10-27 01:21:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:11,600 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions. [2020-10-27 01:21:11,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:21:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions. [2020-10-27 01:21:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:21:11,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:11,600 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:11,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:21:11,601 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash 155096806, now seen corresponding path program 19 times [2020-10-27 01:21:11,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:11,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885948906] [2020-10-27 01:21:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:11,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:12,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:12,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:21:12,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:12,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1139 [2020-10-27 01:21:12,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:21:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:21:12,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:13,390 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 01:21:13,533 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 01:21:13,714 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-27 01:21:14,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:14,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:14,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:14,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:14,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:14,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:14,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:14,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:14,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:14,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:14,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:14,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885948906] [2020-10-27 01:21:14,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:14,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:21:14,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776804321] [2020-10-27 01:21:14,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:21:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:21:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:21:14,198 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand 22 states. [2020-10-27 01:21:15,117 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-27 01:21:15,536 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-27 01:21:15,744 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-27 01:21:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:16,316 INFO L93 Difference]: Finished difference Result 243 states and 270 transitions. [2020-10-27 01:21:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:21:16,317 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-27 01:21:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:16,319 INFO L225 Difference]: With dead ends: 243 [2020-10-27 01:21:16,319 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 01:21:16,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:21:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 01:21:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 215. [2020-10-27 01:21:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 01:21:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions. [2020-10-27 01:21:16,340 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 52 [2020-10-27 01:21:16,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:16,341 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions. [2020-10-27 01:21:16,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:21:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions. [2020-10-27 01:21:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:21:16,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:16,341 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:16,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:21:16,342 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash 605696368, now seen corresponding path program 20 times [2020-10-27 01:21:16,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:16,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459425182] [2020-10-27 01:21:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:16,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:17,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:17,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:21:17,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:17,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-27 01:21:17,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:17,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:21:17,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:17,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:21:17,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:17,534 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 01:21:17,724 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 01:21:17,989 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 01:21:18,248 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-27 01:21:18,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:18,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:18,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:18,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:18,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:18,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:18,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:18,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:18,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:18,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:18,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:18,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459425182] [2020-10-27 01:21:18,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:18,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:21:18,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235591693] [2020-10-27 01:21:18,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:21:18,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:18,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:21:18,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:21:18,854 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand 22 states. [2020-10-27 01:21:19,400 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-27 01:21:19,831 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:21:20,038 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:21:20,335 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-27 01:21:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:21,537 INFO L93 Difference]: Finished difference Result 257 states and 284 transitions. [2020-10-27 01:21:21,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:21:21,538 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-27 01:21:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:21,540 INFO L225 Difference]: With dead ends: 257 [2020-10-27 01:21:21,540 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 01:21:21,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:21:21,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 01:21:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 180. [2020-10-27 01:21:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 01:21:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 199 transitions. [2020-10-27 01:21:21,558 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 199 transitions. Word has length 54 [2020-10-27 01:21:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:21,559 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 199 transitions. [2020-10-27 01:21:21,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:21:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 199 transitions. [2020-10-27 01:21:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:21:21,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:21,560 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:21,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:21:21,560 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:21,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1760517087, now seen corresponding path program 21 times [2020-10-27 01:21:21,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:21,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733100922] [2020-10-27 01:21:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:21,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:22,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:22,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:21:22,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:22,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-27 01:21:22,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:22,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:21:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:21:22,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:23,165 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-27 01:21:23,463 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-27 01:21:23,734 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-27 01:21:24,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:24,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:24,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:24,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:24,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:24,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:24,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:24,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:24,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:24,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:24,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733100922] [2020-10-27 01:21:24,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:24,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:21:24,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824992044] [2020-10-27 01:21:24,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:21:24,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:21:24,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:21:24,330 INFO L87 Difference]: Start difference. First operand 180 states and 199 transitions. Second operand 23 states. [2020-10-27 01:21:25,616 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2020-10-27 01:21:25,905 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-27 01:21:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:26,653 INFO L93 Difference]: Finished difference Result 218 states and 240 transitions. [2020-10-27 01:21:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:21:26,654 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-27 01:21:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:26,656 INFO L225 Difference]: With dead ends: 218 [2020-10-27 01:21:26,656 INFO L226 Difference]: Without dead ends: 212 [2020-10-27 01:21:26,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:21:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-27 01:21:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2020-10-27 01:21:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 01:21:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 221 transitions. [2020-10-27 01:21:26,681 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 221 transitions. Word has length 54 [2020-10-27 01:21:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:26,681 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 221 transitions. [2020-10-27 01:21:26,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:21:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 221 transitions. [2020-10-27 01:21:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:21:26,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:26,682 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:26,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:21:26,683 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash 423475952, now seen corresponding path program 6 times [2020-10-27 01:21:26,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:26,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872935207] [2020-10-27 01:21:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:26,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:26,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:27,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:30,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:30,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:21:30,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:21:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4087 [2020-10-27 01:21:30,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:21:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:21:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:31,150 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-27 01:21:31,384 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-27 01:21:31,650 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 01:21:32,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:32,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:32,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:32,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:32,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:32,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:21:32,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872935207] [2020-10-27 01:21:32,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:32,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:21:32,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779931017] [2020-10-27 01:21:32,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:21:32,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:21:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:21:32,102 INFO L87 Difference]: Start difference. First operand 199 states and 221 transitions. Second operand 20 states. [2020-10-27 01:21:32,948 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-27 01:21:33,143 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-27 01:21:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:33,678 INFO L93 Difference]: Finished difference Result 228 states and 252 transitions. [2020-10-27 01:21:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:21:33,679 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-27 01:21:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:33,680 INFO L225 Difference]: With dead ends: 228 [2020-10-27 01:21:33,680 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 01:21:33,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:21:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 01:21:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-27 01:21:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 01:21:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 218 transitions. [2020-10-27 01:21:33,703 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 218 transitions. Word has length 54 [2020-10-27 01:21:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:33,703 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 218 transitions. [2020-10-27 01:21:33,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:21:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 218 transitions. [2020-10-27 01:21:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:21:33,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:33,704 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:33,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:21:33,704 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:33,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2094590064, now seen corresponding path program 7 times [2020-10-27 01:21:33,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:33,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148561442] [2020-10-27 01:21:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:33,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:34,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:34,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:34,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:21:34,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:21:34,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-27 01:21:34,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:34,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:21:34,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:21:34,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:35,383 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 01:21:35,587 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 01:21:36,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:36,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:36,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:36,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:36,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:36,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:36,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:36,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:36,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:36,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:36,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:21:36,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148561442] [2020-10-27 01:21:36,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:36,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:21:36,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009335204] [2020-10-27 01:21:36,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:21:36,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:21:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:21:36,254 INFO L87 Difference]: Start difference. First operand 199 states and 218 transitions. Second operand 21 states. [2020-10-27 01:21:36,863 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-27 01:21:37,058 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-27 01:21:37,434 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:21:37,642 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:21:38,124 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-27 01:21:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:38,911 INFO L93 Difference]: Finished difference Result 234 states and 254 transitions. [2020-10-27 01:21:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:21:38,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2020-10-27 01:21:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:38,913 INFO L225 Difference]: With dead ends: 234 [2020-10-27 01:21:38,913 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 01:21:38,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:21:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 01:21:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 199. [2020-10-27 01:21:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 01:21:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 217 transitions. [2020-10-27 01:21:38,939 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 217 transitions. Word has length 54 [2020-10-27 01:21:38,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:38,939 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 217 transitions. [2020-10-27 01:21:38,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:21:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 217 transitions. [2020-10-27 01:21:38,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:21:38,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:38,940 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:38,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:21:38,940 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:38,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:38,941 INFO L82 PathProgramCache]: Analyzing trace with hash -245854416, now seen corresponding path program 8 times [2020-10-27 01:21:38,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:38,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513815684] [2020-10-27 01:21:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:39,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:39,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:39,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:21:39,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-27 01:21:39,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:21:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:21:39,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:40,184 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 01:21:40,406 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-27 01:21:40,609 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-27 01:21:41,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:41,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:41,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:41,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:41,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:41,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:41,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:41,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:41,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:41,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:41,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:41,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513815684] [2020-10-27 01:21:41,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:41,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:21:41,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802956546] [2020-10-27 01:21:41,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:21:41,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:41,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:21:41,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:21:41,243 INFO L87 Difference]: Start difference. First operand 199 states and 217 transitions. Second operand 22 states. [2020-10-27 01:21:41,783 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-27 01:21:42,228 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:21:42,737 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-27 01:21:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:43,725 INFO L93 Difference]: Finished difference Result 231 states and 250 transitions. [2020-10-27 01:21:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:21:43,725 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-27 01:21:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:43,727 INFO L225 Difference]: With dead ends: 231 [2020-10-27 01:21:43,727 INFO L226 Difference]: Without dead ends: 208 [2020-10-27 01:21:43,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:21:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-27 01:21:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 194. [2020-10-27 01:21:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 01:21:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 211 transitions. [2020-10-27 01:21:43,744 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 211 transitions. Word has length 54 [2020-10-27 01:21:43,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:43,744 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 211 transitions. [2020-10-27 01:21:43,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:21:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 211 transitions. [2020-10-27 01:21:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:21:43,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:43,745 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:43,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:21:43,745 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:43,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1915810335, now seen corresponding path program 8 times [2020-10-27 01:21:43,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:43,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854341200] [2020-10-27 01:21:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:43,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:44,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:44,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:21:44,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:44,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-27 01:21:44,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:21:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:21:44,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:45,190 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-27 01:21:45,432 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-27 01:21:45,701 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-27 01:21:46,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:46,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:46,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:46,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:46,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:46,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:46,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854341200] [2020-10-27 01:21:46,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:46,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:21:46,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716080261] [2020-10-27 01:21:46,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:21:46,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:21:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:21:46,381 INFO L87 Difference]: Start difference. First operand 194 states and 211 transitions. Second operand 23 states. [2020-10-27 01:21:47,315 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-27 01:21:47,542 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-27 01:21:47,980 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 01:21:48,277 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-27 01:21:48,588 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-27 01:21:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:49,319 INFO L93 Difference]: Finished difference Result 204 states and 222 transitions. [2020-10-27 01:21:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:21:49,320 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-27 01:21:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:49,321 INFO L225 Difference]: With dead ends: 204 [2020-10-27 01:21:49,321 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 01:21:49,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:21:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 01:21:49,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-27 01:21:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 01:21:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 213 transitions. [2020-10-27 01:21:49,342 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 213 transitions. Word has length 54 [2020-10-27 01:21:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:49,342 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 213 transitions. [2020-10-27 01:21:49,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:21:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 213 transitions. [2020-10-27 01:21:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:21:49,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:49,343 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:49,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:21:49,344 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash -124498276, now seen corresponding path program 22 times [2020-10-27 01:21:49,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:49,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127279174] [2020-10-27 01:21:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:49,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:50,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:50,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:21:50,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:50,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 989 [2020-10-27 01:21:50,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:21:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:21:50,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:50,789 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 01:21:51,090 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-27 01:21:51,228 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-27 01:21:51,444 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-27 01:21:52,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:52,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:52,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:52,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:52,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:52,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:21:52,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:52,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127279174] [2020-10-27 01:21:52,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:52,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:21:52,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179896383] [2020-10-27 01:21:52,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:21:52,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:21:52,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:21:52,367 INFO L87 Difference]: Start difference. First operand 196 states and 213 transitions. Second operand 24 states. [2020-10-27 01:21:53,079 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-27 01:21:53,307 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-27 01:21:53,733 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 01:21:53,971 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 01:21:54,157 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-27 01:21:54,451 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-27 01:21:54,714 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-27 01:21:54,931 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:21:55,388 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2020-10-27 01:21:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:56,679 INFO L93 Difference]: Finished difference Result 300 states and 327 transitions. [2020-10-27 01:21:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:21:56,680 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-27 01:21:56,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:56,682 INFO L225 Difference]: With dead ends: 300 [2020-10-27 01:21:56,683 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 01:21:56,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:21:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 01:21:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 260. [2020-10-27 01:21:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 01:21:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 286 transitions. [2020-10-27 01:21:56,718 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 286 transitions. Word has length 56 [2020-10-27 01:21:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:56,718 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 286 transitions. [2020-10-27 01:21:56,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:21:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 286 transitions. [2020-10-27 01:21:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:21:56,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:56,720 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:56,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:21:56,720 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:56,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:56,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2049366300, now seen corresponding path program 9 times [2020-10-27 01:21:56,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:56,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126273750] [2020-10-27 01:21:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:56,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:57,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:57,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:21:57,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:57,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-27 01:21:57,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:57,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:21:57,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:57,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:21:57,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:58,016 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-27 01:21:58,155 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-27 01:21:58,381 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-27 01:21:58,517 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-27 01:21:58,736 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-27 01:21:59,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:59,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:59,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:59,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:59,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:59,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:21:59,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:59,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:59,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126273750] [2020-10-27 01:21:59,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:59,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:21:59,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275021842] [2020-10-27 01:21:59,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:21:59,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:59,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:21:59,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:21:59,513 INFO L87 Difference]: Start difference. First operand 260 states and 286 transitions. Second operand 24 states. [2020-10-27 01:22:01,088 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2020-10-27 01:22:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:02,206 INFO L93 Difference]: Finished difference Result 295 states and 324 transitions. [2020-10-27 01:22:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:22:02,206 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-27 01:22:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:02,209 INFO L225 Difference]: With dead ends: 295 [2020-10-27 01:22:02,209 INFO L226 Difference]: Without dead ends: 287 [2020-10-27 01:22:02,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:22:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-27 01:22:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 269. [2020-10-27 01:22:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-27 01:22:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 297 transitions. [2020-10-27 01:22:02,244 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 297 transitions. Word has length 56 [2020-10-27 01:22:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:02,244 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 297 transitions. [2020-10-27 01:22:02,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:22:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 297 transitions. [2020-10-27 01:22:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:22:02,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:02,245 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:02,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:22:02,246 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:02,246 INFO L82 PathProgramCache]: Analyzing trace with hash 131548759, now seen corresponding path program 23 times [2020-10-27 01:22:02,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:02,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254107433] [2020-10-27 01:22:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:02,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:03,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:03,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:22:03,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:03,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-27 01:22:03,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:22:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:22:03,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:04,083 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-27 01:22:04,382 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-27 01:22:04,705 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 01:22:04,868 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-27 01:22:05,028 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 01:22:05,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:05,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:05,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:05,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:05,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:22:05,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:05,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254107433] [2020-10-27 01:22:05,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:05,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:22:05,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99487861] [2020-10-27 01:22:05,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:22:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:22:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:22:05,783 INFO L87 Difference]: Start difference. First operand 269 states and 297 transitions. Second operand 25 states. [2020-10-27 01:22:07,014 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-27 01:22:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:08,457 INFO L93 Difference]: Finished difference Result 323 states and 353 transitions. [2020-10-27 01:22:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:22:08,458 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-27 01:22:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:08,461 INFO L225 Difference]: With dead ends: 323 [2020-10-27 01:22:08,461 INFO L226 Difference]: Without dead ends: 317 [2020-10-27 01:22:08,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:22:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-27 01:22:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 277. [2020-10-27 01:22:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 01:22:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 305 transitions. [2020-10-27 01:22:08,494 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 305 transitions. Word has length 58 [2020-10-27 01:22:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:08,494 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 305 transitions. [2020-10-27 01:22:08,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:22:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 305 transitions. [2020-10-27 01:22:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:22:08,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:08,495 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:08,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:22:08,496 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:08,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1379613522, now seen corresponding path program 24 times [2020-10-27 01:22:08,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:08,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467786488] [2020-10-27 01:22:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:08,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:09,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:09,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:22:09,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:09,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1325 [2020-10-27 01:22:09,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:22:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:22:09,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:10,232 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-27 01:22:10,471 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-27 01:22:10,788 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 01:22:10,923 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-27 01:22:11,142 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-27 01:22:11,308 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 01:22:11,487 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 01:22:12,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:12,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:12,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:12,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:12,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:12,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:22:12,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:12,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:12,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467786488] [2020-10-27 01:22:12,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:12,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:22:12,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099556372] [2020-10-27 01:22:12,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:22:12,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:22:12,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:22:12,333 INFO L87 Difference]: Start difference. First operand 277 states and 305 transitions. Second operand 25 states. [2020-10-27 01:22:13,588 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:22:13,821 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:22:14,144 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:22:14,405 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:22:14,781 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-27 01:22:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:16,299 INFO L93 Difference]: Finished difference Result 325 states and 355 transitions. [2020-10-27 01:22:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:22:16,299 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-27 01:22:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:16,301 INFO L225 Difference]: With dead ends: 325 [2020-10-27 01:22:16,302 INFO L226 Difference]: Without dead ends: 279 [2020-10-27 01:22:16,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:22:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-27 01:22:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 229. [2020-10-27 01:22:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 01:22:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 249 transitions. [2020-10-27 01:22:16,330 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 249 transitions. Word has length 60 [2020-10-27 01:22:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:16,330 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 249 transitions. [2020-10-27 01:22:16,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:22:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 249 transitions. [2020-10-27 01:22:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:22:16,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:16,331 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:16,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:22:16,332 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash -513817149, now seen corresponding path program 25 times [2020-10-27 01:22:16,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:16,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478961970] [2020-10-27 01:22:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:16,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:17,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:17,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:22:17,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:17,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-10-27 01:22:17,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:22:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:22:17,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:18,010 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-27 01:22:18,210 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-27 01:22:18,503 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-27 01:22:18,629 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-27 01:22:18,825 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-27 01:22:19,187 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-27 01:22:20,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:20,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:20,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:20,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:20,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:20,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:22:20,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:20,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:20,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:20,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:20,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:20,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478961970] [2020-10-27 01:22:20,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:20,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:22:20,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287870869] [2020-10-27 01:22:20,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:22:20,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:20,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:22:20,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:22:20,127 INFO L87 Difference]: Start difference. First operand 229 states and 249 transitions. Second operand 26 states. [2020-10-27 01:22:21,163 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-27 01:22:21,440 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-27 01:22:21,909 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:22:22,165 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:22:22,360 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 01:22:22,772 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-27 01:22:23,158 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2020-10-27 01:22:23,509 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2020-10-27 01:22:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:24,602 INFO L93 Difference]: Finished difference Result 271 states and 294 transitions. [2020-10-27 01:22:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:22:24,603 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-27 01:22:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:24,605 INFO L225 Difference]: With dead ends: 271 [2020-10-27 01:22:24,605 INFO L226 Difference]: Without dead ends: 265 [2020-10-27 01:22:24,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:22:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-27 01:22:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 250. [2020-10-27 01:22:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-27 01:22:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 273 transitions. [2020-10-27 01:22:24,632 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 273 transitions. Word has length 60 [2020-10-27 01:22:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:24,633 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 273 transitions. [2020-10-27 01:22:24,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:22:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 273 transitions. [2020-10-27 01:22:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:22:24,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:24,634 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:24,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:22:24,634 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:24,634 INFO L82 PathProgramCache]: Analyzing trace with hash 917498962, now seen corresponding path program 9 times [2020-10-27 01:22:24,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:24,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132771288] [2020-10-27 01:22:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:24,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:25,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:25,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:27,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:27,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:22:27,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:22:27,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3050 [2020-10-27 01:22:27,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:27,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:22:27,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:27,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:22:27,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:28,186 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-27 01:22:28,424 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:22:29,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:29,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:29,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:29,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:29,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:29,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:22:29,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:29,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:29,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:29,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:29,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:22:29,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132771288] [2020-10-27 01:22:29,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:29,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:22:29,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583781470] [2020-10-27 01:22:29,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:22:29,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:29,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:22:29,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:22:29,323 INFO L87 Difference]: Start difference. First operand 250 states and 273 transitions. Second operand 23 states. [2020-10-27 01:22:30,611 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-27 01:22:31,066 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2020-10-27 01:22:31,363 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-10-27 01:22:31,547 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 01:22:32,095 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2020-10-27 01:22:32,335 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 01:22:32,662 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2020-10-27 01:22:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:33,681 INFO L93 Difference]: Finished difference Result 287 states and 311 transitions. [2020-10-27 01:22:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:22:33,687 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-10-27 01:22:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:33,689 INFO L225 Difference]: With dead ends: 287 [2020-10-27 01:22:33,689 INFO L226 Difference]: Without dead ends: 262 [2020-10-27 01:22:33,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:22:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-27 01:22:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 250. [2020-10-27 01:22:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-27 01:22:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 272 transitions. [2020-10-27 01:22:33,721 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 272 transitions. Word has length 60 [2020-10-27 01:22:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:33,722 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 272 transitions. [2020-10-27 01:22:33,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:22:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 272 transitions. [2020-10-27 01:22:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:22:33,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:33,724 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:33,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:22:33,724 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:33,724 INFO L82 PathProgramCache]: Analyzing trace with hash 117932818, now seen corresponding path program 10 times [2020-10-27 01:22:33,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:33,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668240055] [2020-10-27 01:22:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:34,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:35,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:35,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:22:35,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:22:35,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2108 [2020-10-27 01:22:35,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:22:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:22:35,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:36,376 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 01:22:36,820 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-27 01:22:37,018 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-27 01:22:37,204 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-27 01:22:37,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:37,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:37,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:37,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:37,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:37,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:22:37,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:37,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:37,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:37,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:38,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668240055] [2020-10-27 01:22:38,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:38,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:22:38,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025702260] [2020-10-27 01:22:38,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:22:38,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:22:38,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:22:38,004 INFO L87 Difference]: Start difference. First operand 250 states and 272 transitions. Second operand 25 states. [2020-10-27 01:22:39,282 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-27 01:22:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:40,469 INFO L93 Difference]: Finished difference Result 286 states and 309 transitions. [2020-10-27 01:22:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:22:40,470 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-27 01:22:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:40,472 INFO L225 Difference]: With dead ends: 286 [2020-10-27 01:22:40,472 INFO L226 Difference]: Without dead ends: 261 [2020-10-27 01:22:40,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:22:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-27 01:22:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 245. [2020-10-27 01:22:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-27 01:22:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 265 transitions. [2020-10-27 01:22:40,496 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 265 transitions. Word has length 60 [2020-10-27 01:22:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:40,496 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 265 transitions. [2020-10-27 01:22:40,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:22:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 265 transitions. [2020-10-27 01:22:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:22:40,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:40,497 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:40,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:22:40,498 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1291186109, now seen corresponding path program 11 times [2020-10-27 01:22:40,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:40,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946739255] [2020-10-27 01:22:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:41,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:41,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:22:41,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:41,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1144 [2020-10-27 01:22:41,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:22:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:22:41,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:42,261 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-27 01:22:42,391 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-27 01:22:42,578 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-27 01:22:42,710 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 01:22:42,898 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-27 01:22:43,260 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-27 01:22:44,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:44,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:44,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:44,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:44,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:44,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:22:44,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:44,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:44,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946739255] [2020-10-27 01:22:44,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:44,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:22:44,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130401440] [2020-10-27 01:22:44,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:22:44,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:44,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:22:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:22:44,166 INFO L87 Difference]: Start difference. First operand 245 states and 265 transitions. Second operand 26 states. [2020-10-27 01:22:45,575 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-27 01:22:45,883 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-27 01:22:46,083 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 01:22:46,459 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-27 01:22:46,854 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 96 [2020-10-27 01:22:47,281 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2020-10-27 01:22:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:48,265 INFO L93 Difference]: Finished difference Result 255 states and 276 transitions. [2020-10-27 01:22:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:22:48,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-27 01:22:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:48,268 INFO L225 Difference]: With dead ends: 255 [2020-10-27 01:22:48,268 INFO L226 Difference]: Without dead ends: 247 [2020-10-27 01:22:48,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:22:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-27 01:22:48,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2020-10-27 01:22:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 01:22:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 267 transitions. [2020-10-27 01:22:48,289 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 267 transitions. Word has length 60 [2020-10-27 01:22:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:48,290 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 267 transitions. [2020-10-27 01:22:48,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:22:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 267 transitions. [2020-10-27 01:22:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:22:48,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:48,291 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:48,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:22:48,291 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash -341733442, now seen corresponding path program 26 times [2020-10-27 01:22:48,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:48,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119725811] [2020-10-27 01:22:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:48,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:49,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:49,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:22:49,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:49,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-27 01:22:49,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:22:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:22:49,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:50,269 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-27 01:22:50,626 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-27 01:22:50,761 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 01:22:50,981 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-27 01:22:51,150 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-27 01:22:51,417 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-27 01:22:51,619 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-27 01:22:51,875 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-27 01:22:52,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:52,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:52,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:52,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:22:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:52,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119725811] [2020-10-27 01:22:52,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:52,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:22:52,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870295734] [2020-10-27 01:22:52,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:22:52,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:52,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:22:52,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:22:52,820 INFO L87 Difference]: Start difference. First operand 247 states and 267 transitions. Second operand 27 states. [2020-10-27 01:22:53,575 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-27 01:22:53,788 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-27 01:22:54,223 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:22:54,479 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:22:54,659 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:22:54,987 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:22:55,275 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 01:22:55,459 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:22:55,829 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 01:22:56,140 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-27 01:22:56,377 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 01:22:56,926 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2020-10-27 01:22:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:58,591 INFO L93 Difference]: Finished difference Result 374 states and 406 transitions. [2020-10-27 01:22:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:22:58,592 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-27 01:22:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:58,594 INFO L225 Difference]: With dead ends: 374 [2020-10-27 01:22:58,594 INFO L226 Difference]: Without dead ends: 368 [2020-10-27 01:22:58,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=204, Invalid=2448, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:22:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-27 01:22:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 318. [2020-10-27 01:22:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-27 01:22:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 348 transitions. [2020-10-27 01:22:58,633 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 348 transitions. Word has length 62 [2020-10-27 01:22:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:58,634 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 348 transitions. [2020-10-27 01:22:58,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:22:58,634 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 348 transitions. [2020-10-27 01:22:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:22:58,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:58,635 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:58,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:22:58,635 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:58,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1217389826, now seen corresponding path program 10 times [2020-10-27 01:22:58,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:58,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854104713] [2020-10-27 01:22:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:58,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:00,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:00,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:23:00,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:23:00,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1342 [2020-10-27 01:23:00,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:23:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:23:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:23:00,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:00,627 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-27 01:23:00,977 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-27 01:23:01,272 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-27 01:23:01,637 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2020-10-27 01:23:01,851 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-27 01:23:02,092 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-27 01:23:02,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:23:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:02,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:02,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:02,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:23:02,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:23:02,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:23:02,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:23:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:23:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:23:02,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:23:02,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854104713] [2020-10-27 01:23:02,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:23:02,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:23:02,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065775974] [2020-10-27 01:23:02,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:23:02,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:23:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:23:02,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:23:02,978 INFO L87 Difference]: Start difference. First operand 318 states and 348 transitions. Second operand 27 states.