/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/heap-data/min_max.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:09:04,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:09:04,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:09:04,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:09:04,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:09:04,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:09:04,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:09:04,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:09:04,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:09:04,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:09:04,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:09:04,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:09:04,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:09:04,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:09:04,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:09:04,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:09:04,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:09:04,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:09:04,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:09:04,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:09:04,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:09:04,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:09:04,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:09:04,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:09:04,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:09:04,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:09:04,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:09:04,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:09:04,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:09:04,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:09:04,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:09:04,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:09:04,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:09:04,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:09:04,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:09:04,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:09:04,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:09:04,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:09:04,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:09:04,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:09:04,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:09:04,648 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 01:09:04,674 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:09:04,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:09:04,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:09:04,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:09:04,676 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:09:04,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:09:04,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:09:04,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:09:04,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:09:04,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:09:04,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:09:04,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:09:04,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:09:04,678 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:09:04,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:09:04,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:09:04,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:09:04,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:09:04,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:09:04,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:09:04,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:09:04,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:09:04,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:09:04,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:09:04,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:09:04,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:09:04,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:09:04,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:09:04,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:09:04,681 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:09:05,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:09:05,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:09:05,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:09:05,096 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:09:05,097 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:09:05,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/min_max.i [2020-10-27 01:09:05,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e094c3b28/47b7383a280247319ab88b23dffaba37/FLAG557241e3d [2020-10-27 01:09:05,855 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:09:05,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/min_max.i [2020-10-27 01:09:05,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e094c3b28/47b7383a280247319ab88b23dffaba37/FLAG557241e3d [2020-10-27 01:09:06,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e094c3b28/47b7383a280247319ab88b23dffaba37 [2020-10-27 01:09:06,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:09:06,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:09:06,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:09:06,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:09:06,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:09:06,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:09:06" (1/1) ... [2020-10-27 01:09:06,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50a851d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06, skipping insertion in model container [2020-10-27 01:09:06,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:09:06" (1/1) ... [2020-10-27 01:09:06,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:09:06,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:09:06,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:09:06,623 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:09:06,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:09:06,751 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:09:06,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06 WrapperNode [2020-10-27 01:09:06,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:09:06,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:09:06,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:09:06,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:09:06,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06" (1/1) ... [2020-10-27 01:09:06,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06" (1/1) ... [2020-10-27 01:09:06,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06" (1/1) ... [2020-10-27 01:09:06,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06" (1/1) ... [2020-10-27 01:09:06,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06" (1/1) ... [2020-10-27 01:09:06,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06" (1/1) ... [2020-10-27 01:09:06,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06" (1/1) ... [2020-10-27 01:09:06,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:09:06,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:09:06,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:09:06,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:09:06,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06" (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 01:09:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:09:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:09:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:09:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:09:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:09:06,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:09:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:09:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:09:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:09:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:09:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:09:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:09:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:09:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:09:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:09:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:09:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:09:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:09:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:09:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:09:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:09:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:09:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:09:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:09:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:09:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:09:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:09:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:09:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:09:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:09:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:09:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:09:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:09:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:09:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:09:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:09:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:09:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:09:06,898 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:09:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:09:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:09:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:09:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:09:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:09:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:09:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:09:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:09:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:09:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:09:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:09:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:09:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:09:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:09:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:09:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:09:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:09:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:09:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:09:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:09:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:09:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:09:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:09:06,903 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:09:06,903 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:09:06,903 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:09:06,903 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:09:06,903 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:09:06,918 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:09:06,918 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:09:06,918 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:09:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:09:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:09:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:09:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:09:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:09:06,920 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:09:06,920 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:09:06,920 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:09:06,920 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:09:06,920 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:09:06,920 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:09:06,921 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:09:06,921 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:09:06,921 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:09:06,921 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:09:06,921 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:09:06,921 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:09:06,922 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:09:06,922 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:09:06,922 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:09:06,922 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:09:06,922 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:09:06,922 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:09:06,923 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:09:06,923 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:09:06,923 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:09:06,923 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:09:06,923 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:09:06,923 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:09:06,923 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:09:06,924 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:09:06,924 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:09:06,924 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:09:06,924 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:09:06,924 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:09:06,924 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:09:06,924 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:09:06,925 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:09:06,925 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:09:06,925 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:09:06,925 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:09:06,925 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:09:06,925 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:09:06,925 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:09:06,926 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:09:06,926 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:09:06,926 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:09:06,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:09:06,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:09:06,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:09:06,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:09:06,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:09:06,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:09:06,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:09:06,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:09:06,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:09:06,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:09:07,541 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:09:07,542 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:09:07,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:09:07 BoogieIcfgContainer [2020-10-27 01:09:07,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:09:07,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:09:07,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:09:07,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:09:07,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:09:06" (1/3) ... [2020-10-27 01:09:07,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f775067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:09:07, skipping insertion in model container [2020-10-27 01:09:07,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:06" (2/3) ... [2020-10-27 01:09:07,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f775067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:09:07, skipping insertion in model container [2020-10-27 01:09:07,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:09:07" (3/3) ... [2020-10-27 01:09:07,566 INFO L111 eAbstractionObserver]: Analyzing ICFG min_max.i [2020-10-27 01:09:07,588 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:09:07,594 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:09:07,609 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:09:07,656 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:09:07,656 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:09:07,657 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:09:07,658 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:09:07,658 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:09:07,658 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:09:07,658 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:09:07,658 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:09:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-27 01:09:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:09:07,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:07,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:07,698 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:07,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1944775018, now seen corresponding path program 1 times [2020-10-27 01:09:07,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:07,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312508145] [2020-10-27 01:09:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:07,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:08,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:09:08,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:08,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-27 01:09:08,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:08,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:09:08,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:08,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:09:08,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 01:09:08,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:08,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:08,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:08,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:08,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:09:08,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:08,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:08,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:08,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:08,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:08,448 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 01:09:08,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312508145] [2020-10-27 01:09:08,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:08,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:09:08,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228251429] [2020-10-27 01:09:08,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:09:08,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:08,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:09:08,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:09:08,477 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-10-27 01:09:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:08,678 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2020-10-27 01:09:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:09:08,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 01:09:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:08,690 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:09:08,690 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:09:08,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:09:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:09:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:09:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:09:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-27 01:09:08,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2020-10-27 01:09:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:08,740 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-27 01:09:08,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:09:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-27 01:09:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:09:08,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:08,741 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:08,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:09:08,742 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:08,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1011840127, now seen corresponding path program 1 times [2020-10-27 01:09:08,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:08,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812702180] [2020-10-27 01:09:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:08,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:09,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:09,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:09:09,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:09,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-27 01:09:09,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:09:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:09,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:09:09,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:09,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:09,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:09,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:09,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:09,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:09:09,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:09,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:09,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:09,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:09,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:09,295 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 01:09:09,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812702180] [2020-10-27 01:09:09,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:09,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:09:09,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407613718] [2020-10-27 01:09:09,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:09:09,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:09,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:09:09,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:09:09,311 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-10-27 01:09:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:09,576 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-10-27 01:09:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:09:09,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 01:09:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:09,578 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:09:09,578 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:09:09,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:09:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-27 01:09:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:09:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-27 01:09:09,596 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2020-10-27 01:09:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:09,597 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-27 01:09:09,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:09:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-27 01:09:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:09:09,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:09,599 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:09,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:09:09,599 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:09,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1712904705, now seen corresponding path program 1 times [2020-10-27 01:09:09,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:09,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522541517] [2020-10-27 01:09:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:09,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:09,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:09,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:09:09,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:09,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 01:09:09,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:09:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:09:09,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:09:09,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:09,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:09,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:09,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:09,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:09,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:09:09,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:09,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:09,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:09,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:09,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:09,869 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 01:09:09,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522541517] [2020-10-27 01:09:09,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:09,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:09:09,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131393655] [2020-10-27 01:09:09,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:09:09,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:09,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:09:09,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:09:09,874 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-10-27 01:09:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:10,101 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-27 01:09:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:09:10,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 01:09:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:10,103 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:09:10,103 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:09:10,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:09:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:09:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2020-10-27 01:09:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:09:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-27 01:09:10,111 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-10-27 01:09:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:10,112 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-27 01:09:10,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:09:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-27 01:09:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:09:10,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:10,113 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] [2020-10-27 01:09:10,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:09:10,113 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:10,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:10,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1786754843, now seen corresponding path program 1 times [2020-10-27 01:09:10,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:10,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45254290] [2020-10-27 01:09:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:10,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:10,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:10,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:09:10,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:10,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 01:09:10,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:09:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:09:10,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:10,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:10,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:10,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:10,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:10,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:10,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:09:10,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:10,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:10,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:10,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:10,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:10,412 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 01:09:10,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45254290] [2020-10-27 01:09:10,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:10,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:09:10,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930196146] [2020-10-27 01:09:10,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:09:10,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:10,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:09:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:09:10,415 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2020-10-27 01:09:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:10,590 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-27 01:09:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:09:10,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 01:09:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:10,593 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:09:10,593 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:09:10,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:09:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-27 01:09:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:09:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-27 01:09:10,609 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 21 [2020-10-27 01:09:10,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:10,611 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-27 01:09:10,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:09:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-27 01:09:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:09:10,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:10,613 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] [2020-10-27 01:09:10,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:09:10,613 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1807147875, now seen corresponding path program 1 times [2020-10-27 01:09:10,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:10,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327339559] [2020-10-27 01:09:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:10,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:10,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:10,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:09:10,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:10,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 01:09:10,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:09:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:09:10,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:10,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:10,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:10,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:10,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:10,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:10,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:09:10,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:10,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:10,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:10,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:10,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:10,931 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 01:09:10,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327339559] [2020-10-27 01:09:10,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:10,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:09:10,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797802488] [2020-10-27 01:09:10,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:09:10,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:10,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:09:10,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:09:10,935 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2020-10-27 01:09:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:11,148 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-27 01:09:11,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:09:11,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:09:11,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:11,151 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:09:11,151 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:09:11,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:09:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-10-27 01:09:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:09:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 01:09:11,158 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-10-27 01:09:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:11,159 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 01:09:11,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:09:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 01:09:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:09:11,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:11,160 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] [2020-10-27 01:09:11,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:09:11,160 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:11,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:11,161 INFO L82 PathProgramCache]: Analyzing trace with hash -249146754, now seen corresponding path program 1 times [2020-10-27 01:09:11,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:11,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5319209] [2020-10-27 01:09:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:11,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:11,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:11,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:09:11,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:11,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 01:09:11,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:09:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:09:11,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:11,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:11,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:11,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:11,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:11,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:11,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:11,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:11,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:11,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5319209] [2020-10-27 01:09:11,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:11,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:09:11,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776280026] [2020-10-27 01:09:11,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:09:11,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:09:11,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:09:11,381 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-10-27 01:09:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:11,536 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-27 01:09:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:09:11,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 01:09:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:11,537 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:09:11,537 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:09:11,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:09:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:09:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:09:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-27 01:09:11,545 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2020-10-27 01:09:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:11,546 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-27 01:09:11,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:09:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-27 01:09:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:09:11,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:11,547 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] [2020-10-27 01:09:11,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:09:11,548 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:11,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1211749604, now seen corresponding path program 2 times [2020-10-27 01:09:11,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:11,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35108837] [2020-10-27 01:09:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:11,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:11,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:12,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:12,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:09:12,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:12,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-27 01:09:12,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:09:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:09:12,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:12,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:12,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:12,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:12,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:12,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:12,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:09:12,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:12,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:12,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35108837] [2020-10-27 01:09:12,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:12,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:09:12,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125172994] [2020-10-27 01:09:12,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:09:12,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:12,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:09:12,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:12,787 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 10 states. [2020-10-27 01:09:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:13,425 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-10-27 01:09:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:09:13,425 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 01:09:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:13,427 INFO L225 Difference]: With dead ends: 81 [2020-10-27 01:09:13,427 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:09:13,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:09:13,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-27 01:09:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:09:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-10-27 01:09:13,440 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 29 [2020-10-27 01:09:13,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:13,440 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-10-27 01:09:13,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:09:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-10-27 01:09:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:09:13,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:13,442 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] [2020-10-27 01:09:13,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:09:13,442 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:13,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2062149338, now seen corresponding path program 1 times [2020-10-27 01:09:13,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:13,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962416842] [2020-10-27 01:09:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:13,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:13,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:13,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:09:13,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:13,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 01:09:13,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:13,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:09:13,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:13,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:09:13,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:13,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:13,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:13,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:13,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:13,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:13,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:13,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:13,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:13,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962416842] [2020-10-27 01:09:13,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:13,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:09:13,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132776378] [2020-10-27 01:09:13,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:09:13,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:13,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:09:13,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:09:13,808 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 9 states. [2020-10-27 01:09:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:14,251 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2020-10-27 01:09:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:09:14,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 01:09:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:14,253 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:09:14,253 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:09:14,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:09:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-27 01:09:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:09:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-27 01:09:14,266 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 29 [2020-10-27 01:09:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:14,266 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-27 01:09:14,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:09:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-27 01:09:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:09:14,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:14,268 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] [2020-10-27 01:09:14,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:09:14,268 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash -789047778, now seen corresponding path program 2 times [2020-10-27 01:09:14,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:14,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388028867] [2020-10-27 01:09:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:14,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:14,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:14,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:14,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:16,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:16,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:09:16,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:09:16,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1793 [2020-10-27 01:09:16,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:16,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:09:16,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:16,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:09:16,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:16,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:16,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:16,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:16,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:16,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:16,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:16,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:16,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:16,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:16,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:16,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:09:16,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388028867] [2020-10-27 01:09:16,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:16,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:09:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362674016] [2020-10-27 01:09:16,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:09:16,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:16,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:09:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:09:16,191 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2020-10-27 01:09:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:16,629 INFO L93 Difference]: Finished difference Result 203 states and 256 transitions. [2020-10-27 01:09:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:09:16,629 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 01:09:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:16,632 INFO L225 Difference]: With dead ends: 203 [2020-10-27 01:09:16,632 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 01:09:16,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 01:09:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 83. [2020-10-27 01:09:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:09:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2020-10-27 01:09:16,650 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 29 [2020-10-27 01:09:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:16,651 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2020-10-27 01:09:16,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:09:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2020-10-27 01:09:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:09:16,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:16,653 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] [2020-10-27 01:09:16,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:09:16,653 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:16,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1800165028, now seen corresponding path program 1 times [2020-10-27 01:09:16,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:16,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259693219] [2020-10-27 01:09:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:16,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:16,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:16,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:17,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:17,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:17,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:19,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:19,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:09:19,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:09:19,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2600 [2020-10-27 01:09:19,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:19,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:19,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:19,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:09:19,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:19,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:19,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:19,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:19,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:19,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:19,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:19,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:19,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:19,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:19,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:19,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259693219] [2020-10-27 01:09:19,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:19,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:19,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089881777] [2020-10-27 01:09:19,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:19,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:19,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:19,677 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 12 states. [2020-10-27 01:09:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:20,748 INFO L93 Difference]: Finished difference Result 138 states and 173 transitions. [2020-10-27 01:09:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:09:20,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 01:09:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:20,750 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:09:20,750 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 01:09:20,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:09:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 01:09:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 88. [2020-10-27 01:09:20,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:09:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2020-10-27 01:09:20,773 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 29 [2020-10-27 01:09:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:20,774 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2020-10-27 01:09:20,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2020-10-27 01:09:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:09:20,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:20,775 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:20,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:09:20,775 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:20,776 INFO L82 PathProgramCache]: Analyzing trace with hash -484230536, now seen corresponding path program 1 times [2020-10-27 01:09:20,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:20,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199645666] [2020-10-27 01:09:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:20,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:20,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:21,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:22,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:22,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:09:22,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:22,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1231 [2020-10-27 01:09:22,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:22,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:22,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:22,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:09:22,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:22,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:22,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:22,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:22,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:22,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:22,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:22,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:22,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:22,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199645666] [2020-10-27 01:09:22,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:22,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:22,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332142440] [2020-10-27 01:09:22,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:22,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:22,322 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand 12 states. [2020-10-27 01:09:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:23,275 INFO L93 Difference]: Finished difference Result 218 states and 271 transitions. [2020-10-27 01:09:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:09:23,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 01:09:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:23,280 INFO L225 Difference]: With dead ends: 218 [2020-10-27 01:09:23,280 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 01:09:23,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:09:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 01:09:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 114. [2020-10-27 01:09:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:09:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 148 transitions. [2020-10-27 01:09:23,307 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 148 transitions. Word has length 31 [2020-10-27 01:09:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:23,307 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 148 transitions. [2020-10-27 01:09:23,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:23,308 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 148 transitions. [2020-10-27 01:09:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:09:23,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:23,315 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:23,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:09:23,316 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:23,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1505298890, now seen corresponding path program 1 times [2020-10-27 01:09:23,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:23,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468488924] [2020-10-27 01:09:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:23,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:23,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:23,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:09:23,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:23,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-27 01:09:23,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:09:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:09:23,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:09:23,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:23,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:23,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:23,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:23,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:23,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:23,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468488924] [2020-10-27 01:09:23,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:23,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:09:23,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755624625] [2020-10-27 01:09:23,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:09:23,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:09:23,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:09:23,639 INFO L87 Difference]: Start difference. First operand 114 states and 148 transitions. Second operand 9 states. [2020-10-27 01:09:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:24,070 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2020-10-27 01:09:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:09:24,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-27 01:09:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:24,073 INFO L225 Difference]: With dead ends: 189 [2020-10-27 01:09:24,073 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 01:09:24,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 01:09:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 151. [2020-10-27 01:09:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 01:09:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 196 transitions. [2020-10-27 01:09:24,094 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 196 transitions. Word has length 31 [2020-10-27 01:09:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:24,094 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 196 transitions. [2020-10-27 01:09:24,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:09:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 196 transitions. [2020-10-27 01:09:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:09:24,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:24,096 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:24,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:09:24,096 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1816592054, now seen corresponding path program 1 times [2020-10-27 01:09:24,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:24,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323339087] [2020-10-27 01:09:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:24,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:24,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:24,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:26,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:26,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:09:26,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:09:26,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2078 [2020-10-27 01:09:26,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:26,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:09:26,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:26,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:09:26,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:26,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:26,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:26,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:26,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:26,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:26,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:09:26,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:26,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:26,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:26,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:26,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:26,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323339087] [2020-10-27 01:09:26,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:26,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:26,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437539866] [2020-10-27 01:09:26,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:26,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:26,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:26,390 INFO L87 Difference]: Start difference. First operand 151 states and 196 transitions. Second operand 11 states. [2020-10-27 01:09:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:27,049 INFO L93 Difference]: Finished difference Result 219 states and 273 transitions. [2020-10-27 01:09:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:09:27,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:09:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:27,051 INFO L225 Difference]: With dead ends: 219 [2020-10-27 01:09:27,052 INFO L226 Difference]: Without dead ends: 215 [2020-10-27 01:09:27,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:09:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-27 01:09:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 155. [2020-10-27 01:09:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:09:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 202 transitions. [2020-10-27 01:09:27,073 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 202 transitions. Word has length 31 [2020-10-27 01:09:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:27,074 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 202 transitions. [2020-10-27 01:09:27,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 202 transitions. [2020-10-27 01:09:27,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:09:27,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:27,075 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:27,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:09:27,075 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:27,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash -61528710, now seen corresponding path program 2 times [2020-10-27 01:09:27,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:27,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480402656] [2020-10-27 01:09:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:27,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:27,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:28,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:28,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:09:28,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:28,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-27 01:09:28,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:28,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:09:28,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:28,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:28,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:28,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:28,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480402656] [2020-10-27 01:09:28,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:28,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:28,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568003641] [2020-10-27 01:09:28,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:28,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:28,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:28,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:28,361 INFO L87 Difference]: Start difference. First operand 155 states and 202 transitions. Second operand 13 states. [2020-10-27 01:09:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:29,400 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2020-10-27 01:09:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:09:29,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 01:09:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:29,402 INFO L225 Difference]: With dead ends: 218 [2020-10-27 01:09:29,402 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 01:09:29,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:09:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 01:09:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 151. [2020-10-27 01:09:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 01:09:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 196 transitions. [2020-10-27 01:09:29,430 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 196 transitions. Word has length 31 [2020-10-27 01:09:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:29,430 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 196 transitions. [2020-10-27 01:09:29,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 196 transitions. [2020-10-27 01:09:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:09:29,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:29,433 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:29,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:09:29,433 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:29,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1082597064, now seen corresponding path program 1 times [2020-10-27 01:09:29,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:29,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673178585] [2020-10-27 01:09:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:29,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:29,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:29,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:09:29,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:29,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 01:09:29,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:09:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:09:29,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:29,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:29,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:29,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:29,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:29,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:29,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:29,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:29,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:29,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:29,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:29,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:29,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673178585] [2020-10-27 01:09:29,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:29,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:09:29,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457986670] [2020-10-27 01:09:29,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:09:29,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:29,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:09:29,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:29,837 INFO L87 Difference]: Start difference. First operand 151 states and 196 transitions. Second operand 10 states. [2020-10-27 01:09:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:30,554 INFO L93 Difference]: Finished difference Result 205 states and 254 transitions. [2020-10-27 01:09:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:09:30,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 01:09:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:30,558 INFO L225 Difference]: With dead ends: 205 [2020-10-27 01:09:30,559 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 01:09:30,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:09:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 01:09:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2020-10-27 01:09:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:09:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2020-10-27 01:09:30,577 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 31 [2020-10-27 01:09:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:30,577 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2020-10-27 01:09:30,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:09:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2020-10-27 01:09:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:09:30,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:30,578 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] [2020-10-27 01:09:30,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:09:30,579 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2055673416, now seen corresponding path program 1 times [2020-10-27 01:09:30,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:30,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221325605] [2020-10-27 01:09:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:30,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:33,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:33,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:09:33,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:09:33,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2517 [2020-10-27 01:09:33,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:33,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:09:33,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:09:33,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:09:33,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:33,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:33,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:33,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:33,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:33,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:33,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:33,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:33,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:33,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221325605] [2020-10-27 01:09:33,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:33,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:33,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306099938] [2020-10-27 01:09:33,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:33,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:33,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:33,405 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand 11 states. [2020-10-27 01:09:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:33,964 INFO L93 Difference]: Finished difference Result 204 states and 247 transitions. [2020-10-27 01:09:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:09:33,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:09:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:33,968 INFO L225 Difference]: With dead ends: 204 [2020-10-27 01:09:33,968 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 01:09:33,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:09:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 01:09:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 123. [2020-10-27 01:09:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 01:09:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2020-10-27 01:09:33,986 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 31 [2020-10-27 01:09:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:33,986 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2020-10-27 01:09:33,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2020-10-27 01:09:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:09:33,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:33,987 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:33,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:09:33,988 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:33,988 INFO L82 PathProgramCache]: Analyzing trace with hash 433855546, now seen corresponding path program 1 times [2020-10-27 01:09:33,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:33,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846667278] [2020-10-27 01:09:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:34,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:34,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:34,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:34,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:34,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:39,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:39,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:09:39,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:09:39,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:09:39,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:39,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:09:39,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:39,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:09:39,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:39,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:39,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:39,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:39,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:39,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:39,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:39,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:39,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:39,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846667278] [2020-10-27 01:09:39,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:39,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:39,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277221067] [2020-10-27 01:09:39,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:39,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:39,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:39,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:39,195 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand 11 states. [2020-10-27 01:09:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:40,202 INFO L93 Difference]: Finished difference Result 228 states and 280 transitions. [2020-10-27 01:09:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:09:40,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:09:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:40,205 INFO L225 Difference]: With dead ends: 228 [2020-10-27 01:09:40,206 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 01:09:40,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:09:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 01:09:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 113. [2020-10-27 01:09:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:09:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2020-10-27 01:09:40,226 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 31 [2020-10-27 01:09:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:40,226 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2020-10-27 01:09:40,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:40,226 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2020-10-27 01:09:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:40,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:40,228 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:40,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:09:40,228 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1756297603, now seen corresponding path program 1 times [2020-10-27 01:09:40,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:40,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16489761] [2020-10-27 01:09:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:40,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:40,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:40,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:40,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:40,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 01:09:40,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:40,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:09:40,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:40,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:09:40,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:40,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:40,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:40,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:40,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:40,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:40,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:40,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:40,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:40,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:40,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16489761] [2020-10-27 01:09:40,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:40,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:09:40,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061942249] [2020-10-27 01:09:40,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:09:40,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:40,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:09:40,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:09:40,524 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand 9 states. [2020-10-27 01:09:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:40,817 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2020-10-27 01:09:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:09:40,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 01:09:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:40,819 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:09:40,819 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:09:40,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:09:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-27 01:09:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 01:09:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 176 transitions. [2020-10-27 01:09:40,838 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 176 transitions. Word has length 34 [2020-10-27 01:09:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:40,839 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 176 transitions. [2020-10-27 01:09:40,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:09:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 176 transitions. [2020-10-27 01:09:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:40,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:40,841 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:40,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:09:40,843 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:40,844 INFO L82 PathProgramCache]: Analyzing trace with hash -98766784, now seen corresponding path program 3 times [2020-10-27 01:09:40,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:40,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7388592] [2020-10-27 01:09:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:40,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:40,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:41,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:42,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:42,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:42,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:09:42,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1496 [2020-10-27 01:09:42,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:42,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:42,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:09:42,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:09:42,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:42,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:42,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:42,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:42,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:42,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:42,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:42,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:42,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:42,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:42,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:42,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:42,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7388592] [2020-10-27 01:09:42,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:42,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:42,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322009859] [2020-10-27 01:09:42,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:42,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:42,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:42,653 INFO L87 Difference]: Start difference. First operand 138 states and 176 transitions. Second operand 13 states. [2020-10-27 01:09:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:43,613 INFO L93 Difference]: Finished difference Result 269 states and 331 transitions. [2020-10-27 01:09:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:09:43,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-27 01:09:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:43,620 INFO L225 Difference]: With dead ends: 269 [2020-10-27 01:09:43,620 INFO L226 Difference]: Without dead ends: 257 [2020-10-27 01:09:43,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:09:43,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-27 01:09:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 164. [2020-10-27 01:09:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:09:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 213 transitions. [2020-10-27 01:09:43,649 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 213 transitions. Word has length 34 [2020-10-27 01:09:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:43,649 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 213 transitions. [2020-10-27 01:09:43,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 213 transitions. [2020-10-27 01:09:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:43,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:43,651 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:43,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:09:43,651 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:43,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1119835138, now seen corresponding path program 4 times [2020-10-27 01:09:43,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:43,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571267343] [2020-10-27 01:09:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:43,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:43,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:43,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:43,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:43,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:43,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-27 01:09:43,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:43,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:43,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:09:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:09:43,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:44,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:44,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:44,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:44,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:44,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:44,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:44,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:44,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:44,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571267343] [2020-10-27 01:09:44,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:44,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:44,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647607380] [2020-10-27 01:09:44,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:44,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:44,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:44,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:44,230 INFO L87 Difference]: Start difference. First operand 164 states and 213 transitions. Second operand 12 states. [2020-10-27 01:09:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:44,989 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2020-10-27 01:09:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:09:44,990 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-27 01:09:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:44,992 INFO L225 Difference]: With dead ends: 266 [2020-10-27 01:09:44,992 INFO L226 Difference]: Without dead ends: 262 [2020-10-27 01:09:44,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:09:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-27 01:09:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 159. [2020-10-27 01:09:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-27 01:09:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 206 transitions. [2020-10-27 01:09:45,017 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 206 transitions. Word has length 34 [2020-10-27 01:09:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:45,017 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 206 transitions. [2020-10-27 01:09:45,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 206 transitions. [2020-10-27 01:09:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:45,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:45,018 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] [2020-10-27 01:09:45,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:09:45,018 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1787710526, now seen corresponding path program 2 times [2020-10-27 01:09:45,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:45,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119633500] [2020-10-27 01:09:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:45,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:45,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:45,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:46,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:46,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:46,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:46,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-27 01:09:46,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:46,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:09:46,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:09:46,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:09:46,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:09:46,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:46,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:46,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:46,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:46,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:46,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:46,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:46,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:09:46,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119633500] [2020-10-27 01:09:46,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:46,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:09:46,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491401353] [2020-10-27 01:09:46,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:09:46,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:46,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:09:46,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:09:46,574 INFO L87 Difference]: Start difference. First operand 159 states and 206 transitions. Second operand 8 states. [2020-10-27 01:09:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:46,882 INFO L93 Difference]: Finished difference Result 331 states and 418 transitions. [2020-10-27 01:09:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:09:46,883 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 01:09:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:46,885 INFO L225 Difference]: With dead ends: 331 [2020-10-27 01:09:46,885 INFO L226 Difference]: Without dead ends: 251 [2020-10-27 01:09:46,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-27 01:09:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-27 01:09:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 01:09:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 212 transitions. [2020-10-27 01:09:46,909 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 212 transitions. Word has length 34 [2020-10-27 01:09:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:46,909 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 212 transitions. [2020-10-27 01:09:46,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:09:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 212 transitions. [2020-10-27 01:09:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:46,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:46,910 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] [2020-10-27 01:09:46,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:09:46,911 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:46,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1496139520, now seen corresponding path program 3 times [2020-10-27 01:09:46,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:46,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866948310] [2020-10-27 01:09:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:46,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:47,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:47,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:47,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:47,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:47,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-27 01:09:47,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:09:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:09:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:47,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:47,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:47,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:47,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:47,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:47,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:47,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:47,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:47,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866948310] [2020-10-27 01:09:47,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:47,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:09:47,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350852786] [2020-10-27 01:09:47,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:09:47,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:09:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:47,901 INFO L87 Difference]: Start difference. First operand 165 states and 212 transitions. Second operand 15 states. [2020-10-27 01:09:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:49,597 INFO L93 Difference]: Finished difference Result 254 states and 313 transitions. [2020-10-27 01:09:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:09:49,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 01:09:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:49,603 INFO L225 Difference]: With dead ends: 254 [2020-10-27 01:09:49,603 INFO L226 Difference]: Without dead ends: 250 [2020-10-27 01:09:49,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:09:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-27 01:09:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 161. [2020-10-27 01:09:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:09:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 207 transitions. [2020-10-27 01:09:49,627 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 207 transitions. Word has length 34 [2020-10-27 01:09:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:49,627 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 207 transitions. [2020-10-27 01:09:49,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:09:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 207 transitions. [2020-10-27 01:09:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:49,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:49,628 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] [2020-10-27 01:09:49,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:09:49,629 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1486188416, now seen corresponding path program 4 times [2020-10-27 01:09:49,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:49,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570679329] [2020-10-27 01:09:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:49,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:49,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:49,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:49,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:49,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 01:09:49,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:49,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:09:49,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:09:49,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:09:49,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:49,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:49,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:49,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:49,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:49,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:49,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:49,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:49,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:49,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:49,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:49,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:09:49,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570679329] [2020-10-27 01:09:49,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:49,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:09:49,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516916177] [2020-10-27 01:09:49,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:09:49,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:49,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:09:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:09:49,926 INFO L87 Difference]: Start difference. First operand 161 states and 207 transitions. Second operand 9 states. [2020-10-27 01:09:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:50,478 INFO L93 Difference]: Finished difference Result 231 states and 289 transitions. [2020-10-27 01:09:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:50,479 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 01:09:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:50,480 INFO L225 Difference]: With dead ends: 231 [2020-10-27 01:09:50,480 INFO L226 Difference]: Without dead ends: 227 [2020-10-27 01:09:50,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-27 01:09:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 158. [2020-10-27 01:09:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 01:09:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2020-10-27 01:09:50,505 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 34 [2020-10-27 01:09:50,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:50,505 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2020-10-27 01:09:50,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:09:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2020-10-27 01:09:50,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:50,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:50,506 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] [2020-10-27 01:09:50,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:09:50,506 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:50,507 INFO L82 PathProgramCache]: Analyzing trace with hash -232780290, now seen corresponding path program 5 times [2020-10-27 01:09:50,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:50,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810479610] [2020-10-27 01:09:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:50,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:50,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:50,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:51,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:52,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:52,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:52,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:09:52,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2361 [2020-10-27 01:09:52,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:52,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:52,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:09:52,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:53,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:53,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:53,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:53,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:53,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:53,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:53,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:53,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:53,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:53,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:53,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:09:53,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810479610] [2020-10-27 01:09:53,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:53,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512856499] [2020-10-27 01:09:53,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:53,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:53,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:53,024 INFO L87 Difference]: Start difference. First operand 158 states and 200 transitions. Second operand 12 states. [2020-10-27 01:09:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:53,759 INFO L93 Difference]: Finished difference Result 461 states and 568 transitions. [2020-10-27 01:09:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:09:53,761 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-27 01:09:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:53,763 INFO L225 Difference]: With dead ends: 461 [2020-10-27 01:09:53,764 INFO L226 Difference]: Without dead ends: 380 [2020-10-27 01:09:53,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:09:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-27 01:09:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 148. [2020-10-27 01:09:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 01:09:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2020-10-27 01:09:53,804 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 34 [2020-10-27 01:09:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:53,804 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2020-10-27 01:09:53,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2020-10-27 01:09:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:53,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:53,807 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] [2020-10-27 01:09:53,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:09:53,807 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:53,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:53,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1243897540, now seen corresponding path program 6 times [2020-10-27 01:09:53,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:53,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347501509] [2020-10-27 01:09:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:53,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:53,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:54,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:54,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:54,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:54,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:56,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:56,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:56,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:09:56,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3133 [2020-10-27 01:09:56,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:09:56,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:57,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:57,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:57,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:57,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:57,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:57,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:57,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:57,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:57,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:57,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:57,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:57,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347501509] [2020-10-27 01:09:57,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:57,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:57,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931790924] [2020-10-27 01:09:57,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:57,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:57,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:57,203 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand 13 states. [2020-10-27 01:09:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:58,718 INFO L93 Difference]: Finished difference Result 336 states and 410 transitions. [2020-10-27 01:09:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:09:58,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-27 01:09:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:58,720 INFO L225 Difference]: With dead ends: 336 [2020-10-27 01:09:58,721 INFO L226 Difference]: Without dead ends: 332 [2020-10-27 01:09:58,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:09:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-27 01:09:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 176. [2020-10-27 01:09:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 01:09:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 229 transitions. [2020-10-27 01:09:58,756 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 229 transitions. Word has length 34 [2020-10-27 01:09:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:58,756 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 229 transitions. [2020-10-27 01:09:58,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 229 transitions. [2020-10-27 01:09:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:09:58,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:58,757 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:58,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:09:58,758 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1926040100, now seen corresponding path program 2 times [2020-10-27 01:09:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:58,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525012901] [2020-10-27 01:09:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:58,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:58,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:58,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:59,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:59,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:59,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:59,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:09:59,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:09:59,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1164 [2020-10-27 01:09:59,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:59,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:59,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:09:59,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:09:59,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:00,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:00,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:00,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:00,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:00,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:00,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:00,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:00,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:00,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:00,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:00,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:00,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525012901] [2020-10-27 01:10:00,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:00,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:10:00,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091175766] [2020-10-27 01:10:00,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:10:00,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:00,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:10:00,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:00,228 INFO L87 Difference]: Start difference. First operand 176 states and 229 transitions. Second operand 15 states. [2020-10-27 01:10:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:02,131 INFO L93 Difference]: Finished difference Result 294 states and 364 transitions. [2020-10-27 01:10:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:10:02,139 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 01:10:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:02,140 INFO L225 Difference]: With dead ends: 294 [2020-10-27 01:10:02,140 INFO L226 Difference]: Without dead ends: 290 [2020-10-27 01:10:02,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:10:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-27 01:10:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-27 01:10:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 01:10:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 219 transitions. [2020-10-27 01:10:02,169 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 219 transitions. Word has length 36 [2020-10-27 01:10:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:02,169 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 219 transitions. [2020-10-27 01:10:02,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:10:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 219 transitions. [2020-10-27 01:10:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:10:02,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:02,170 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:02,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:10:02,171 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1864000486, now seen corresponding path program 3 times [2020-10-27 01:10:02,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:02,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662953954] [2020-10-27 01:10:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:02,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:02,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:02,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:10:02,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:02,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 01:10:02,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:10:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:10:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:10:02,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:02,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:02,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:02,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:02,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:02,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:02,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:10:02,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:02,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:02,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:10:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:10:02,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662953954] [2020-10-27 01:10:02,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:02,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:02,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852336231] [2020-10-27 01:10:02,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:02,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:02,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:02,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:02,725 INFO L87 Difference]: Start difference. First operand 169 states and 219 transitions. Second operand 12 states. [2020-10-27 01:10:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:03,835 INFO L93 Difference]: Finished difference Result 203 states and 257 transitions. [2020-10-27 01:10:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:10:03,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-27 01:10:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:03,837 INFO L225 Difference]: With dead ends: 203 [2020-10-27 01:10:03,837 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 01:10:03,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:10:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 01:10:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 140. [2020-10-27 01:10:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:10:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 179 transitions. [2020-10-27 01:10:03,862 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 179 transitions. Word has length 36 [2020-10-27 01:10:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:03,862 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 179 transitions. [2020-10-27 01:10:03,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2020-10-27 01:10:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:10:03,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:03,863 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:03,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:10:03,863 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2004204961, now seen corresponding path program 2 times [2020-10-27 01:10:03,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:03,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611307546] [2020-10-27 01:10:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:03,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:03,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:04,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:04,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:05,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:06,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:06,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:07,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:08,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:08,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:08,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:10:08,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:10:08,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:10:08,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:08,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:10:08,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:10:08,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:10:08,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:09,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:09,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:09,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:09,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:09,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:09,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:09,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:09,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:09,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611307546] [2020-10-27 01:10:09,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:09,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:10:09,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66778861] [2020-10-27 01:10:09,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:10:09,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:09,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:10:09,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:09,259 INFO L87 Difference]: Start difference. First operand 140 states and 179 transitions. Second operand 15 states. [2020-10-27 01:10:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:11,097 INFO L93 Difference]: Finished difference Result 305 states and 389 transitions. [2020-10-27 01:10:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:10:11,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 01:10:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:11,100 INFO L225 Difference]: With dead ends: 305 [2020-10-27 01:10:11,100 INFO L226 Difference]: Without dead ends: 301 [2020-10-27 01:10:11,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:10:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-27 01:10:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 239. [2020-10-27 01:10:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 01:10:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 312 transitions. [2020-10-27 01:10:11,143 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 312 transitions. Word has length 39 [2020-10-27 01:10:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:11,144 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 312 transitions. [2020-10-27 01:10:11,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:10:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 312 transitions. [2020-10-27 01:10:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:10:11,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:11,145 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:11,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:10:11,145 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:11,146 INFO L82 PathProgramCache]: Analyzing trace with hash 107440607, now seen corresponding path program 7 times [2020-10-27 01:10:11,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:11,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461315968] [2020-10-27 01:10:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:11,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:11,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:11,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:12,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:12,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:10:12,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:12,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-27 01:10:12,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:10:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:10:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:10:12,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:12,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:12,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:12,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:12,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:12,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:12,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:12,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:12,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:12,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461315968] [2020-10-27 01:10:12,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:12,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:12,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736231337] [2020-10-27 01:10:12,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:12,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:12,382 INFO L87 Difference]: Start difference. First operand 239 states and 312 transitions. Second operand 12 states. [2020-10-27 01:10:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:14,083 INFO L93 Difference]: Finished difference Result 428 states and 530 transitions. [2020-10-27 01:10:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:10:14,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 01:10:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:14,087 INFO L225 Difference]: With dead ends: 428 [2020-10-27 01:10:14,087 INFO L226 Difference]: Without dead ends: 424 [2020-10-27 01:10:14,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:10:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-27 01:10:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 158. [2020-10-27 01:10:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 01:10:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2020-10-27 01:10:14,130 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 39 [2020-10-27 01:10:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:14,130 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2020-10-27 01:10:14,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2020-10-27 01:10:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:10:14,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:14,131 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:14,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:10:14,132 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:14,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1808151841, now seen corresponding path program 8 times [2020-10-27 01:10:14,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:14,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406714768] [2020-10-27 01:10:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:14,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:14,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:14,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:10:14,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:14,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 01:10:14,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:10:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:10:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:10:14,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:14,689 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-10-27 01:10:14,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:14,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:14,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:14,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:14,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:14,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:14,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:14,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:14,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:14,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:14,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:14,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406714768] [2020-10-27 01:10:14,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:14,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326536580] [2020-10-27 01:10:14,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:14,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:14,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:14,949 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand 12 states. [2020-10-27 01:10:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:16,125 INFO L93 Difference]: Finished difference Result 310 states and 379 transitions. [2020-10-27 01:10:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:10:16,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 01:10:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:16,127 INFO L225 Difference]: With dead ends: 310 [2020-10-27 01:10:16,127 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 01:10:16,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:10:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 01:10:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 171. [2020-10-27 01:10:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 01:10:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 220 transitions. [2020-10-27 01:10:16,169 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 220 transitions. Word has length 39 [2020-10-27 01:10:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:16,169 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 220 transitions. [2020-10-27 01:10:16,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 220 transitions. [2020-10-27 01:10:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:10:16,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:16,170 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:16,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:10:16,170 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:16,171 INFO L82 PathProgramCache]: Analyzing trace with hash 217611813, now seen corresponding path program 9 times [2020-10-27 01:10:16,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:16,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37932890] [2020-10-27 01:10:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:16,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:16,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:16,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:16,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:16,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:16,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:17,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:17,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:21,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:21,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:10:21,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:10:21,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:10:21,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:10:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:21,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:21,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:21,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:21,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:21,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:21,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:21,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:21,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:21,472 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 01:10:21,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37932890] [2020-10-27 01:10:21,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:21,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:10:21,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525152160] [2020-10-27 01:10:21,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:10:21,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:21,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:10:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:10:21,474 INFO L87 Difference]: Start difference. First operand 171 states and 220 transitions. Second operand 13 states. [2020-10-27 01:10:22,807 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-27 01:10:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:24,005 INFO L93 Difference]: Finished difference Result 348 states and 421 transitions. [2020-10-27 01:10:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:10:24,009 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 01:10:24,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:24,011 INFO L225 Difference]: With dead ends: 348 [2020-10-27 01:10:24,011 INFO L226 Difference]: Without dead ends: 344 [2020-10-27 01:10:24,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:10:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-27 01:10:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 173. [2020-10-27 01:10:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 01:10:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 224 transitions. [2020-10-27 01:10:24,045 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 224 transitions. Word has length 39 [2020-10-27 01:10:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:24,045 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 224 transitions. [2020-10-27 01:10:24,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:10:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 224 transitions. [2020-10-27 01:10:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:10:24,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:24,046 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:24,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:10:24,047 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1965709915, now seen corresponding path program 10 times [2020-10-27 01:10:24,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:24,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020551509] [2020-10-27 01:10:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:24,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:24,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:24,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:24,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:26,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:27,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:27,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:10:27,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:10:27,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3118 [2020-10-27 01:10:27,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:10:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:27,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:27,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:27,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:27,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:27,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:27,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:27,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:27,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:27,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:27,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:27,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:27,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:27,489 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 01:10:27,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020551509] [2020-10-27 01:10:27,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:27,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:10:27,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225827833] [2020-10-27 01:10:27,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:10:27,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:10:27,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:10:27,491 INFO L87 Difference]: Start difference. First operand 173 states and 224 transitions. Second operand 14 states. [2020-10-27 01:10:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:30,140 INFO L93 Difference]: Finished difference Result 304 states and 374 transitions. [2020-10-27 01:10:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:10:30,140 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 01:10:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:30,142 INFO L225 Difference]: With dead ends: 304 [2020-10-27 01:10:30,142 INFO L226 Difference]: Without dead ends: 300 [2020-10-27 01:10:30,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:10:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-27 01:10:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 149. [2020-10-27 01:10:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:10:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 191 transitions. [2020-10-27 01:10:30,181 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 191 transitions. Word has length 39 [2020-10-27 01:10:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:30,182 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 191 transitions. [2020-10-27 01:10:30,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:10:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 191 transitions. [2020-10-27 01:10:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:30,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:30,183 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:30,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:10:30,183 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1824617221, now seen corresponding path program 3 times [2020-10-27 01:10:30,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:30,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501579154] [2020-10-27 01:10:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:30,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:30,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:30,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:30,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:30,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 01:10:30,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:30,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:10:30,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:10:30,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:30,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:30,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:30,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:30,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:30,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:30,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:30,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:10:30,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:30,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:30,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:30,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:30,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:30,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501579154] [2020-10-27 01:10:30,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:30,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:10:30,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671721591] [2020-10-27 01:10:30,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:10:30,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:10:30,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:10:30,632 INFO L87 Difference]: Start difference. First operand 149 states and 191 transitions. Second operand 11 states. [2020-10-27 01:10:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:31,706 INFO L93 Difference]: Finished difference Result 311 states and 386 transitions. [2020-10-27 01:10:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:10:31,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 01:10:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:31,709 INFO L225 Difference]: With dead ends: 311 [2020-10-27 01:10:31,709 INFO L226 Difference]: Without dead ends: 307 [2020-10-27 01:10:31,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:10:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-27 01:10:31,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 229. [2020-10-27 01:10:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 01:10:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 298 transitions. [2020-10-27 01:10:31,771 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 298 transitions. Word has length 41 [2020-10-27 01:10:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:31,771 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 298 transitions. [2020-10-27 01:10:31,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:10:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 298 transitions. [2020-10-27 01:10:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:31,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:31,773 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:31,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:10:31,773 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash 242209915, now seen corresponding path program 4 times [2020-10-27 01:10:31,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:31,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542137917] [2020-10-27 01:10:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:31,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:32,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:32,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:32,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:32,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-27 01:10:32,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:10:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:10:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:32,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:32,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:32,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:32,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:32,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:32,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:32,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:32,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:32,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542137917] [2020-10-27 01:10:32,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:32,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:10:32,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430171328] [2020-10-27 01:10:32,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:10:32,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:10:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:10:32,381 INFO L87 Difference]: Start difference. First operand 229 states and 298 transitions. Second operand 13 states. [2020-10-27 01:10:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:33,530 INFO L93 Difference]: Finished difference Result 352 states and 433 transitions. [2020-10-27 01:10:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:10:33,531 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 01:10:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:33,533 INFO L225 Difference]: With dead ends: 352 [2020-10-27 01:10:33,533 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 01:10:33,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:10:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 01:10:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 248. [2020-10-27 01:10:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-27 01:10:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 321 transitions. [2020-10-27 01:10:33,606 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 321 transitions. Word has length 41 [2020-10-27 01:10:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:33,606 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 321 transitions. [2020-10-27 01:10:33,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:10:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 321 transitions. [2020-10-27 01:10:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:33,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:33,612 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:33,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:10:33,612 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:33,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1898837371, now seen corresponding path program 5 times [2020-10-27 01:10:33,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:33,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989670078] [2020-10-27 01:10:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:33,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:33,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:35,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:35,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:35,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:35,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1536 [2020-10-27 01:10:35,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:35,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:10:35,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:10:35,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:35,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:35,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:35,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:35,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:35,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:35,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:35,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:35,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:35,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989670078] [2020-10-27 01:10:35,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:35,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:10:35,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309593835] [2020-10-27 01:10:35,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:10:35,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:35,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:10:35,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:10:35,471 INFO L87 Difference]: Start difference. First operand 248 states and 321 transitions. Second operand 13 states. [2020-10-27 01:10:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:37,303 INFO L93 Difference]: Finished difference Result 415 states and 504 transitions. [2020-10-27 01:10:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:10:37,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 01:10:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:37,306 INFO L225 Difference]: With dead ends: 415 [2020-10-27 01:10:37,307 INFO L226 Difference]: Without dead ends: 411 [2020-10-27 01:10:37,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:10:37,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-27 01:10:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 257. [2020-10-27 01:10:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-27 01:10:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 334 transitions. [2020-10-27 01:10:37,381 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 334 transitions. Word has length 41 [2020-10-27 01:10:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:37,381 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 334 transitions. [2020-10-27 01:10:37,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:10:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 334 transitions. [2020-10-27 01:10:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:37,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:37,382 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:37,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:10:37,383 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:37,383 INFO L82 PathProgramCache]: Analyzing trace with hash -329302789, now seen corresponding path program 2 times [2020-10-27 01:10:37,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:37,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675488072] [2020-10-27 01:10:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:37,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:37,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:37,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:37,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:37,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:37,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:38,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:38,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:38,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:42,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:42,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:42,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:10:42,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:10:42,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:10:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:10:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:42,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:42,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:42,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:42,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:42,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:42,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:42,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:42,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:42,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:42,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:42,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:42,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:42,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675488072] [2020-10-27 01:10:42,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:42,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:10:42,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796392439] [2020-10-27 01:10:42,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:10:42,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:42,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:10:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:10:42,812 INFO L87 Difference]: Start difference. First operand 257 states and 334 transitions. Second operand 14 states. [2020-10-27 01:10:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:44,073 INFO L93 Difference]: Finished difference Result 391 states and 485 transitions. [2020-10-27 01:10:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:10:44,074 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-27 01:10:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:44,077 INFO L225 Difference]: With dead ends: 391 [2020-10-27 01:10:44,077 INFO L226 Difference]: Without dead ends: 387 [2020-10-27 01:10:44,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:10:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-27 01:10:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 265. [2020-10-27 01:10:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-27 01:10:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 346 transitions. [2020-10-27 01:10:44,150 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 346 transitions. Word has length 41 [2020-10-27 01:10:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:44,151 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 346 transitions. [2020-10-27 01:10:44,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:10:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 346 transitions. [2020-10-27 01:10:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:44,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:44,152 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:44,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:10:44,152 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1123017347, now seen corresponding path program 2 times [2020-10-27 01:10:44,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:44,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441445949] [2020-10-27 01:10:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:44,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:44,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:45,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:45,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:45,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:45,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-27 01:10:45,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:10:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:10:45,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:45,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:45,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:45,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:45,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:45,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:45,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:45,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:45,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 01:10:45,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441445949] [2020-10-27 01:10:45,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:45,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:10:45,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618208080] [2020-10-27 01:10:45,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:10:45,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:45,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:10:45,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:10:45,190 INFO L87 Difference]: Start difference. First operand 265 states and 346 transitions. Second operand 10 states. [2020-10-27 01:10:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:45,946 INFO L93 Difference]: Finished difference Result 820 states and 1052 transitions. [2020-10-27 01:10:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:10:45,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-27 01:10:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:45,950 INFO L225 Difference]: With dead ends: 820 [2020-10-27 01:10:45,950 INFO L226 Difference]: Without dead ends: 686 [2020-10-27 01:10:45,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:10:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-10-27 01:10:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 403. [2020-10-27 01:10:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-27 01:10:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 545 transitions. [2020-10-27 01:10:46,044 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 545 transitions. Word has length 41 [2020-10-27 01:10:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:46,044 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 545 transitions. [2020-10-27 01:10:46,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:10:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 545 transitions. [2020-10-27 01:10:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:46,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:46,046 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:46,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:10:46,046 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:46,047 INFO L82 PathProgramCache]: Analyzing trace with hash 943809789, now seen corresponding path program 6 times [2020-10-27 01:10:46,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:46,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409415451] [2020-10-27 01:10:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:46,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:46,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:46,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:46,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:46,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 01:10:46,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:10:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:10:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:46,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:46,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:46,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:46,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:46,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:46,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:46,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:46,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409415451] [2020-10-27 01:10:46,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:46,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:10:46,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364581812] [2020-10-27 01:10:46,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:10:46,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:46,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:10:46,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:10:46,716 INFO L87 Difference]: Start difference. First operand 403 states and 545 transitions. Second operand 14 states. [2020-10-27 01:10:47,870 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-27 01:10:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:48,531 INFO L93 Difference]: Finished difference Result 425 states and 568 transitions. [2020-10-27 01:10:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:10:48,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-27 01:10:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:48,535 INFO L225 Difference]: With dead ends: 425 [2020-10-27 01:10:48,535 INFO L226 Difference]: Without dead ends: 421 [2020-10-27 01:10:48,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:10:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-27 01:10:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 233. [2020-10-27 01:10:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 01:10:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 308 transitions. [2020-10-27 01:10:48,582 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 308 transitions. Word has length 41 [2020-10-27 01:10:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:48,582 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 308 transitions. [2020-10-27 01:10:48,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:10:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 308 transitions. [2020-10-27 01:10:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:10:48,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:48,586 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:48,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:10:48,586 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:48,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:48,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1998507874, now seen corresponding path program 3 times [2020-10-27 01:10:48,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:48,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626440345] [2020-10-27 01:10:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:48,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:48,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:48,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:10:48,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:48,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 01:10:48,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:48,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:10:48,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:48,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:10:48,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:48,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:48,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:48,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:48,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:48,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:48,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:48,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:48,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:48,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626440345] [2020-10-27 01:10:48,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:48,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:10:48,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639299170] [2020-10-27 01:10:48,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:10:48,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:48,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:10:48,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:10:48,977 INFO L87 Difference]: Start difference. First operand 233 states and 308 transitions. Second operand 11 states. [2020-10-27 01:10:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:49,450 INFO L93 Difference]: Finished difference Result 336 states and 447 transitions. [2020-10-27 01:10:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:10:49,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-27 01:10:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:49,452 INFO L225 Difference]: With dead ends: 336 [2020-10-27 01:10:49,452 INFO L226 Difference]: Without dead ends: 309 [2020-10-27 01:10:49,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:10:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-27 01:10:49,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 305. [2020-10-27 01:10:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-27 01:10:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 398 transitions. [2020-10-27 01:10:49,537 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 398 transitions. Word has length 44 [2020-10-27 01:10:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:49,537 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 398 transitions. [2020-10-27 01:10:49,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:10:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 398 transitions. [2020-10-27 01:10:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:10:49,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:49,539 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:49,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:10:49,539 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:49,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:49,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1355248387, now seen corresponding path program 11 times [2020-10-27 01:10:49,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:49,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895462974] [2020-10-27 01:10:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:49,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:49,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:50,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:50,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:10:50,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:50,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-27 01:10:50,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:10:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:10:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:10:50,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:50,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:50,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:50,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:50,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:50,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:50,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:10:50,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:50,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:50,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895462974] [2020-10-27 01:10:50,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:50,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:10:50,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70999435] [2020-10-27 01:10:50,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:10:50,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:10:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:50,545 INFO L87 Difference]: Start difference. First operand 305 states and 398 transitions. Second operand 15 states. [2020-10-27 01:10:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:51,894 INFO L93 Difference]: Finished difference Result 547 states and 682 transitions. [2020-10-27 01:10:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:10:51,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-27 01:10:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:51,897 INFO L225 Difference]: With dead ends: 547 [2020-10-27 01:10:51,898 INFO L226 Difference]: Without dead ends: 543 [2020-10-27 01:10:51,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:10:51,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-10-27 01:10:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 345. [2020-10-27 01:10:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-27 01:10:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 455 transitions. [2020-10-27 01:10:52,016 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 455 transitions. Word has length 44 [2020-10-27 01:10:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:52,017 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 455 transitions. [2020-10-27 01:10:52,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:10:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 455 transitions. [2020-10-27 01:10:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:10:52,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:52,018 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:52,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:10:52,018 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:52,018 INFO L82 PathProgramCache]: Analyzing trace with hash -828073341, now seen corresponding path program 5 times [2020-10-27 01:10:52,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:52,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318737248] [2020-10-27 01:10:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:52,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:52,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:52,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:52,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:10:52,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:52,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-27 01:10:52,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:52,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:10:52,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:10:52,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:10:52,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:52,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:52,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:52,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:52,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:52,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:52,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:52,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:52,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:52,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:52,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318737248] [2020-10-27 01:10:52,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:52,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:10:52,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430553165] [2020-10-27 01:10:52,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:10:52,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:52,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:10:52,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:10:52,666 INFO L87 Difference]: Start difference. First operand 345 states and 455 transitions. Second operand 14 states. [2020-10-27 01:10:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:54,055 INFO L93 Difference]: Finished difference Result 557 states and 699 transitions. [2020-10-27 01:10:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:10:54,056 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-27 01:10:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:54,059 INFO L225 Difference]: With dead ends: 557 [2020-10-27 01:10:54,059 INFO L226 Difference]: Without dead ends: 553 [2020-10-27 01:10:54,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:10:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-10-27 01:10:54,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 338. [2020-10-27 01:10:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-27 01:10:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 446 transitions. [2020-10-27 01:10:54,167 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 446 transitions. Word has length 44 [2020-10-27 01:10:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:54,168 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 446 transitions. [2020-10-27 01:10:54,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:10:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 446 transitions. [2020-10-27 01:10:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:10:54,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:54,169 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:54,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:10:54,169 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1553515515, now seen corresponding path program 12 times [2020-10-27 01:10:54,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:54,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905240335] [2020-10-27 01:10:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:54,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:54,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:54,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:10:54,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:54,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 01:10:54,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:54,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:10:54,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:10:54,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:10:54,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:54,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:54,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:54,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:54,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:54,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:54,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:54,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:54,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:54,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:54,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:54,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:10:54,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905240335] [2020-10-27 01:10:54,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:54,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:54,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689897426] [2020-10-27 01:10:54,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:54,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:54,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:54,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:54,797 INFO L87 Difference]: Start difference. First operand 338 states and 446 transitions. Second operand 12 states. [2020-10-27 01:10:55,269 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-27 01:10:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:56,073 INFO L93 Difference]: Finished difference Result 470 states and 604 transitions. [2020-10-27 01:10:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:10:56,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-27 01:10:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:56,076 INFO L225 Difference]: With dead ends: 470 [2020-10-27 01:10:56,076 INFO L226 Difference]: Without dead ends: 466 [2020-10-27 01:10:56,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:10:56,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-27 01:10:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 326. [2020-10-27 01:10:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-27 01:10:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 431 transitions. [2020-10-27 01:10:56,148 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 431 transitions. Word has length 44 [2020-10-27 01:10:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:56,149 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 431 transitions. [2020-10-27 01:10:56,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 431 transitions. [2020-10-27 01:10:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:10:56,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:56,150 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:56,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:10:56,150 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:56,151 INFO L82 PathProgramCache]: Analyzing trace with hash 558130053, now seen corresponding path program 13 times [2020-10-27 01:10:56,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:56,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700368910] [2020-10-27 01:10:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:56,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:56,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:56,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:10:56,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:56,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 01:10:56,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:10:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:10:56,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:10:56,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:56,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:56,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:56,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:56,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:56,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:56,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:56,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:56,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:56,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:10:56,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700368910] [2020-10-27 01:10:56,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:56,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:10:56,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001273737] [2020-10-27 01:10:56,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:10:56,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:56,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:10:56,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:10:56,633 INFO L87 Difference]: Start difference. First operand 326 states and 431 transitions. Second operand 11 states. [2020-10-27 01:10:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:57,972 INFO L93 Difference]: Finished difference Result 457 states and 598 transitions. [2020-10-27 01:10:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:10:57,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-27 01:10:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:57,976 INFO L225 Difference]: With dead ends: 457 [2020-10-27 01:10:57,976 INFO L226 Difference]: Without dead ends: 453 [2020-10-27 01:10:57,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:10:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-27 01:10:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 136. [2020-10-27 01:10:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:10:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2020-10-27 01:10:58,025 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 44 [2020-10-27 01:10:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:58,025 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2020-10-27 01:10:58,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:10:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2020-10-27 01:10:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:10:58,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:58,026 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:58,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:10:58,027 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash 432805498, now seen corresponding path program 4 times [2020-10-27 01:10:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:58,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108056357] [2020-10-27 01:10:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:58,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:58,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:58,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:58,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:58,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:59,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:03,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:03,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:11:03,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:11:03,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:11:03,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:03,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:11:03,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:11:03,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:11:03,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:03,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:03,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:03,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:03,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:03,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:03,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:11:03,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:03,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:03,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108056357] [2020-10-27 01:11:03,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:03,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:11:03,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668701083] [2020-10-27 01:11:03,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:11:03,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:03,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:11:03,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:11:03,627 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand 17 states. [2020-10-27 01:11:06,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:06,085 INFO L93 Difference]: Finished difference Result 350 states and 433 transitions. [2020-10-27 01:11:06,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:11:06,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-27 01:11:06,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:06,087 INFO L225 Difference]: With dead ends: 350 [2020-10-27 01:11:06,087 INFO L226 Difference]: Without dead ends: 346 [2020-10-27 01:11:06,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:11:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-27 01:11:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-27 01:11:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-27 01:11:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 343 transitions. [2020-10-27 01:11:06,170 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 343 transitions. Word has length 49 [2020-10-27 01:11:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:06,170 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 343 transitions. [2020-10-27 01:11:06,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:11:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 343 transitions. [2020-10-27 01:11:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:11:06,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:06,172 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:06,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:11:06,172 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash 628858618, now seen corresponding path program 14 times [2020-10-27 01:11:06,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:06,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991464680] [2020-10-27 01:11:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:06,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:06,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:06,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:06,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:07,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:07,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:11,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:11,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:11:11,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:11:11,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:11:11,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:11,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:11:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:11:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:11:11,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:11,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:11,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:11,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:11,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:11,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:11,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:11,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:11,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:11,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:11,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:11,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:11,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991464680] [2020-10-27 01:11:11,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:11,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:11:11,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142828999] [2020-10-27 01:11:11,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:11:11,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:11,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:11:11,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:11:11,705 INFO L87 Difference]: Start difference. First operand 269 states and 343 transitions. Second operand 16 states. [2020-10-27 01:11:12,737 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-27 01:11:12,994 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-27 01:11:13,679 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2020-10-27 01:11:13,861 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-27 01:11:14,016 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-27 01:11:14,305 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-27 01:11:14,817 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2020-10-27 01:11:14,989 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-27 01:11:15,181 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-27 01:11:15,614 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-10-27 01:11:15,807 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-27 01:11:15,961 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-27 01:11:16,238 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-27 01:11:16,715 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2020-10-27 01:11:16,904 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-27 01:11:17,046 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 01:11:17,217 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-27 01:11:17,664 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-27 01:11:18,033 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-27 01:11:18,213 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-27 01:11:18,948 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-27 01:11:19,139 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-27 01:11:19,527 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-27 01:11:20,104 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-27 01:11:20,254 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-27 01:11:20,681 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 01:11:20,844 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-27 01:11:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:21,305 INFO L93 Difference]: Finished difference Result 854 states and 1033 transitions. [2020-10-27 01:11:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-27 01:11:21,306 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 01:11:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:21,308 INFO L225 Difference]: With dead ends: 854 [2020-10-27 01:11:21,309 INFO L226 Difference]: Without dead ends: 850 [2020-10-27 01:11:21,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1004, Invalid=4696, Unknown=0, NotChecked=0, Total=5700 [2020-10-27 01:11:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-10-27 01:11:21,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 402. [2020-10-27 01:11:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-27 01:11:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 524 transitions. [2020-10-27 01:11:21,447 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 524 transitions. Word has length 49 [2020-10-27 01:11:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:21,448 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 524 transitions. [2020-10-27 01:11:21,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:11:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 524 transitions. [2020-10-27 01:11:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:11:21,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:21,449 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:21,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:11:21,449 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:21,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:21,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2012545286, now seen corresponding path program 15 times [2020-10-27 01:11:21,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:21,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406176388] [2020-10-27 01:11:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:21,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:21,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:22,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:22,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:11:22,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:11:22,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-27 01:11:22,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:22,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:11:22,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:11:22,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:11:22,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:23,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:23,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:23,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:23,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:23,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:11:23,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:23,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406176388] [2020-10-27 01:11:23,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:23,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:11:23,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963208523] [2020-10-27 01:11:23,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:11:23,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:23,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:11:23,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:11:23,104 INFO L87 Difference]: Start difference. First operand 402 states and 524 transitions. Second operand 16 states. [2020-10-27 01:11:24,615 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-27 01:11:24,794 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 01:11:25,002 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 01:11:25,331 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-27 01:11:25,502 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 01:11:26,089 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 01:11:26,281 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-27 01:11:26,617 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 01:11:26,852 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-27 01:11:27,085 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 01:11:27,603 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 01:11:28,337 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:11:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:28,677 INFO L93 Difference]: Finished difference Result 758 states and 939 transitions. [2020-10-27 01:11:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:11:28,678 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 01:11:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:28,681 INFO L225 Difference]: With dead ends: 758 [2020-10-27 01:11:28,681 INFO L226 Difference]: Without dead ends: 754 [2020-10-27 01:11:28,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:11:28,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2020-10-27 01:11:28,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 480. [2020-10-27 01:11:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-27 01:11:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 630 transitions. [2020-10-27 01:11:28,842 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 630 transitions. Word has length 49 [2020-10-27 01:11:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:28,843 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 630 transitions. [2020-10-27 01:11:28,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:11:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 630 transitions. [2020-10-27 01:11:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:11:28,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:28,844 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:28,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:11:28,844 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1597818490, now seen corresponding path program 16 times [2020-10-27 01:11:28,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:28,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72761986] [2020-10-27 01:11:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:28,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:29,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:29,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:11:29,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:29,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-27 01:11:29,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:11:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:11:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:11:29,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:29,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:29,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:29,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:29,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:29,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:29,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:11:29,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:29,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:29,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:29,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72761986] [2020-10-27 01:11:29,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:29,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:11:29,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826481138] [2020-10-27 01:11:29,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:11:29,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:11:29,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:11:29,582 INFO L87 Difference]: Start difference. First operand 480 states and 630 transitions. Second operand 14 states. [2020-10-27 01:11:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:31,647 INFO L93 Difference]: Finished difference Result 714 states and 900 transitions. [2020-10-27 01:11:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:11:31,648 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-27 01:11:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:31,652 INFO L225 Difference]: With dead ends: 714 [2020-10-27 01:11:31,652 INFO L226 Difference]: Without dead ends: 710 [2020-10-27 01:11:31,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:11:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-10-27 01:11:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 519. [2020-10-27 01:11:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-10-27 01:11:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 689 transitions. [2020-10-27 01:11:31,819 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 689 transitions. Word has length 49 [2020-10-27 01:11:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:31,819 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 689 transitions. [2020-10-27 01:11:31,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:11:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 689 transitions. [2020-10-27 01:11:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:11:31,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:31,820 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:31,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:11:31,821 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:31,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:31,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1793871610, now seen corresponding path program 6 times [2020-10-27 01:11:31,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:31,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784325809] [2020-10-27 01:11:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:31,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:32,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:32,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:11:32,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:32,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-27 01:11:32,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:32,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:11:32,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:11:32,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:11:32,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:32,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:32,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:32,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:32,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:32,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:32,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:32,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:32,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:32,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784325809] [2020-10-27 01:11:32,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:32,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:11:32,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341039095] [2020-10-27 01:11:32,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:11:32,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:32,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:11:32,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:11:32,456 INFO L87 Difference]: Start difference. First operand 519 states and 689 transitions. Second operand 13 states. [2020-10-27 01:11:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:35,041 INFO L93 Difference]: Finished difference Result 749 states and 955 transitions. [2020-10-27 01:11:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:11:35,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 01:11:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:35,044 INFO L225 Difference]: With dead ends: 749 [2020-10-27 01:11:35,044 INFO L226 Difference]: Without dead ends: 745 [2020-10-27 01:11:35,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:11:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-10-27 01:11:35,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 566. [2020-10-27 01:11:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-10-27 01:11:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 757 transitions. [2020-10-27 01:11:35,236 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 757 transitions. Word has length 49 [2020-10-27 01:11:35,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:35,237 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 757 transitions. [2020-10-27 01:11:35,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:11:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 757 transitions. [2020-10-27 01:11:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:11:35,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:35,238 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:35,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:11:35,238 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:35,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:35,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1255068352, now seen corresponding path program 17 times [2020-10-27 01:11:35,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:35,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207470120] [2020-10-27 01:11:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:35,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:35,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:35,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:35,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:36,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:36,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:37,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:37,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:39,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:39,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:39,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:40,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:40,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:11:40,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 01:11:40,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:11:40,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:11:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:11:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:40,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:40,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:40,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:40,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:40,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:40,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-27 01:11:40,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207470120] [2020-10-27 01:11:40,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:11:40,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:11:40,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584470408] [2020-10-27 01:11:40,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:11:40,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:11:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:11:40,347 INFO L87 Difference]: Start difference. First operand 566 states and 757 transitions. Second operand 7 states. [2020-10-27 01:11:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:40,798 INFO L93 Difference]: Finished difference Result 892 states and 1208 transitions. [2020-10-27 01:11:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:11:40,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-27 01:11:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:40,801 INFO L225 Difference]: With dead ends: 892 [2020-10-27 01:11:40,801 INFO L226 Difference]: Without dead ends: 440 [2020-10-27 01:11:40,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:11:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-27 01:11:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2020-10-27 01:11:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-10-27 01:11:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 585 transitions. [2020-10-27 01:11:41,060 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 585 transitions. Word has length 49 [2020-10-27 01:11:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:41,060 INFO L481 AbstractCegarLoop]: Abstraction has 440 states and 585 transitions. [2020-10-27 01:11:41,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:11:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 585 transitions. [2020-10-27 01:11:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:11:41,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:41,065 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:41,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:11:41,065 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:41,066 INFO L82 PathProgramCache]: Analyzing trace with hash -614742442, now seen corresponding path program 4 times [2020-10-27 01:11:41,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:41,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250514174] [2020-10-27 01:11:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:41,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:41,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:41,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:11:41,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:41,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-27 01:11:41,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:11:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:11:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:11:41,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:41,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:41,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:41,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:41,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:41,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:41,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:41,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:41,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:41,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:41,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:41,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:41,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250514174] [2020-10-27 01:11:41,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:41,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:11:41,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985950564] [2020-10-27 01:11:41,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:11:41,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:41,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:11:41,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:11:41,921 INFO L87 Difference]: Start difference. First operand 440 states and 585 transitions. Second operand 13 states. [2020-10-27 01:11:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:44,281 INFO L93 Difference]: Finished difference Result 705 states and 898 transitions. [2020-10-27 01:11:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:11:44,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-27 01:11:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:44,286 INFO L225 Difference]: With dead ends: 705 [2020-10-27 01:11:44,286 INFO L226 Difference]: Without dead ends: 701 [2020-10-27 01:11:44,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:11:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-10-27 01:11:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 558. [2020-10-27 01:11:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-10-27 01:11:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 743 transitions. [2020-10-27 01:11:44,479 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 743 transitions. Word has length 51 [2020-10-27 01:11:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:44,480 INFO L481 AbstractCegarLoop]: Abstraction has 558 states and 743 transitions. [2020-10-27 01:11:44,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:11:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 743 transitions. [2020-10-27 01:11:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:11:44,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:44,481 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:44,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:11:44,482 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:44,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1186255146, now seen corresponding path program 7 times [2020-10-27 01:11:44,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:44,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545327544] [2020-10-27 01:11:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:44,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:45,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:45,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:11:45,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:45,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-27 01:11:45,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:11:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:11:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:11:45,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:45,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:45,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:45,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:45,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:45,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:45,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:11:45,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:45,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:45,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:45,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:45,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:45,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545327544] [2020-10-27 01:11:45,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:45,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:11:45,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341634404] [2020-10-27 01:11:45,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:11:45,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:45,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:11:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:11:45,719 INFO L87 Difference]: Start difference. First operand 558 states and 743 transitions. Second operand 15 states. [2020-10-27 01:11:47,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:47,954 INFO L93 Difference]: Finished difference Result 768 states and 973 transitions. [2020-10-27 01:11:47,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:11:47,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-27 01:11:47,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:47,959 INFO L225 Difference]: With dead ends: 768 [2020-10-27 01:11:47,960 INFO L226 Difference]: Without dead ends: 764 [2020-10-27 01:11:47,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:11:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-10-27 01:11:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 594. [2020-10-27 01:11:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-10-27 01:11:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 789 transitions. [2020-10-27 01:11:48,205 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 789 transitions. Word has length 51 [2020-10-27 01:11:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:48,206 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 789 transitions. [2020-10-27 01:11:48,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:11:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 789 transitions. [2020-10-27 01:11:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:11:48,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:48,207 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:48,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:11:48,208 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1388728874, now seen corresponding path program 8 times [2020-10-27 01:11:48,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:48,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486871165] [2020-10-27 01:11:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:48,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:48,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:48,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:11:48,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:48,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-27 01:11:48,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:11:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:11:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:11:48,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:49,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:49,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:49,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:49,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:49,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:49,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:49,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:49,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:49,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:49,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:49,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486871165] [2020-10-27 01:11:49,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:49,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:11:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783736076] [2020-10-27 01:11:49,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:11:49,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:49,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:11:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:11:49,341 INFO L87 Difference]: Start difference. First operand 594 states and 789 transitions. Second operand 15 states. [2020-10-27 01:11:51,706 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 01:11:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:52,310 INFO L93 Difference]: Finished difference Result 880 states and 1116 transitions. [2020-10-27 01:11:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:11:52,311 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-27 01:11:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:52,331 INFO L225 Difference]: With dead ends: 880 [2020-10-27 01:11:52,331 INFO L226 Difference]: Without dead ends: 876 [2020-10-27 01:11:52,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:11:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-10-27 01:11:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 662. [2020-10-27 01:11:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-10-27 01:11:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 887 transitions. [2020-10-27 01:11:52,760 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 887 transitions. Word has length 51 [2020-10-27 01:11:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:52,760 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 887 transitions. [2020-10-27 01:11:52,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:11:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 887 transitions. [2020-10-27 01:11:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:11:52,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:52,762 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:52,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:11:52,763 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:52,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:52,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1960241578, now seen corresponding path program 9 times [2020-10-27 01:11:52,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:52,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715669958] [2020-10-27 01:11:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:52,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:52,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:54,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:54,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:11:54,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:11:54,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-27 01:11:54,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:54,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:11:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:11:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:11:54,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:54,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:54,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:54,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:54,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:54,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:54,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:54,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:54,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:54,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:54,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:54,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715669958] [2020-10-27 01:11:54,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:54,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:11:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578792410] [2020-10-27 01:11:54,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:11:54,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:11:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:11:54,799 INFO L87 Difference]: Start difference. First operand 662 states and 887 transitions. Second operand 17 states. [2020-10-27 01:11:56,796 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-27 01:11:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:59,359 INFO L93 Difference]: Finished difference Result 939 states and 1184 transitions. [2020-10-27 01:11:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:11:59,360 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-27 01:11:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:59,365 INFO L225 Difference]: With dead ends: 939 [2020-10-27 01:11:59,365 INFO L226 Difference]: Without dead ends: 935 [2020-10-27 01:11:59,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:11:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2020-10-27 01:11:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 662. [2020-10-27 01:11:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-10-27 01:11:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 887 transitions. [2020-10-27 01:11:59,638 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 887 transitions. Word has length 51 [2020-10-27 01:11:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:59,638 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 887 transitions. [2020-10-27 01:11:59,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:11:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 887 transitions. [2020-10-27 01:11:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:11:59,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:59,640 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:59,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:11:59,640 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1249734954, now seen corresponding path program 10 times [2020-10-27 01:11:59,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:59,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373795391] [2020-10-27 01:11:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:59,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:00,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:01,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:01,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:12:01,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:12:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1745 [2020-10-27 01:12:01,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:12:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:12:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:12:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:01,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:01,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:01,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:01,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:01,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:01,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:12:01,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:01,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:01,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373795391] [2020-10-27 01:12:01,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:01,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:12:01,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573325627] [2020-10-27 01:12:01,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:12:01,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:01,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:12:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:12:01,841 INFO L87 Difference]: Start difference. First operand 662 states and 887 transitions. Second operand 15 states. [2020-10-27 01:12:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:06,565 INFO L93 Difference]: Finished difference Result 1024 states and 1269 transitions. [2020-10-27 01:12:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:12:06,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-27 01:12:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:06,571 INFO L225 Difference]: With dead ends: 1024 [2020-10-27 01:12:06,571 INFO L226 Difference]: Without dead ends: 1020 [2020-10-27 01:12:06,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=297, Invalid=2055, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:12:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2020-10-27 01:12:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 662. [2020-10-27 01:12:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-10-27 01:12:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 887 transitions. [2020-10-27 01:12:06,842 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 887 transitions. Word has length 51 [2020-10-27 01:12:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:06,842 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 887 transitions. [2020-10-27 01:12:06,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:12:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 887 transitions. [2020-10-27 01:12:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:12:06,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:06,843 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:06,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:12:06,843 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:06,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1821247658, now seen corresponding path program 11 times [2020-10-27 01:12:06,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:06,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998668033] [2020-10-27 01:12:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:06,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:07,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:11,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:11,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:12:11,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:12:11,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4745 [2020-10-27 01:12:11,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:11,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:12:11,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:12:11,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:12:11,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:12,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:12,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:12,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:12,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:12,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:12,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:12:12,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:12,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:12,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:12,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:12,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:12,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998668033] [2020-10-27 01:12:12,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:12,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:12:12,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64213179] [2020-10-27 01:12:12,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:12:12,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:12,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:12:12,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:12:12,159 INFO L87 Difference]: Start difference. First operand 662 states and 887 transitions. Second operand 17 states. [2020-10-27 01:12:14,177 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-27 01:12:14,978 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-27 01:12:16,079 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-27 01:12:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:16,694 INFO L93 Difference]: Finished difference Result 1173 states and 1444 transitions. [2020-10-27 01:12:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:12:16,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-27 01:12:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:16,701 INFO L225 Difference]: With dead ends: 1173 [2020-10-27 01:12:16,701 INFO L226 Difference]: Without dead ends: 1169 [2020-10-27 01:12:16,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:12:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2020-10-27 01:12:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 698. [2020-10-27 01:12:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-10-27 01:12:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 940 transitions. [2020-10-27 01:12:16,994 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 940 transitions. Word has length 51 [2020-10-27 01:12:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:16,994 INFO L481 AbstractCegarLoop]: Abstraction has 698 states and 940 transitions. [2020-10-27 01:12:16,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:12:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 940 transitions. [2020-10-27 01:12:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:12:16,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:16,995 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:16,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:12:16,996 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2023721386, now seen corresponding path program 12 times [2020-10-27 01:12:16,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:16,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65600247] [2020-10-27 01:12:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:17,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:17,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:17,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:17,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:18,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:20,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:22,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:22,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:12:22,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:12:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:12:22,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:12:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:12:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:12:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:22,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:22,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:22,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:22,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:22,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:22,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:12:22,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:22,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:22,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:22,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:22,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:22,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65600247] [2020-10-27 01:12:22,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:22,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:12:22,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577755400] [2020-10-27 01:12:22,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:12:22,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:12:22,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:12:22,622 INFO L87 Difference]: Start difference. First operand 698 states and 940 transitions. Second operand 16 states. [2020-10-27 01:12:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:29,207 INFO L93 Difference]: Finished difference Result 1149 states and 1429 transitions. [2020-10-27 01:12:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 01:12:29,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-27 01:12:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:29,213 INFO L225 Difference]: With dead ends: 1149 [2020-10-27 01:12:29,213 INFO L226 Difference]: Without dead ends: 1145 [2020-10-27 01:12:29,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=503, Invalid=3787, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 01:12:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2020-10-27 01:12:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 642. [2020-10-27 01:12:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-10-27 01:12:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 857 transitions. [2020-10-27 01:12:29,476 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 857 transitions. Word has length 51 [2020-10-27 01:12:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:29,477 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 857 transitions. [2020-10-27 01:12:29,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:12:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 857 transitions. [2020-10-27 01:12:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:12:29,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:29,478 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:29,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:12:29,478 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:29,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1536594856, now seen corresponding path program 13 times [2020-10-27 01:12:29,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:29,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795418640] [2020-10-27 01:12:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:29,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:29,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:30,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:31,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:31,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:12:31,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:12:31,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-27 01:12:31,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:12:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:12:31,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:32,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:32,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:32,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:32,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:32,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:12:32,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:32,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:32,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:32,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:32,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:32,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795418640] [2020-10-27 01:12:32,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:32,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:12:32,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128279213] [2020-10-27 01:12:32,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:12:32,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:12:32,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:12:32,098 INFO L87 Difference]: Start difference. First operand 642 states and 857 transitions. Second operand 18 states. [2020-10-27 01:12:33,395 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-27 01:12:33,818 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 01:12:34,155 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-27 01:12:34,350 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-27 01:12:34,513 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-27 01:12:34,684 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-27 01:12:34,901 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-27 01:12:35,375 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2020-10-27 01:12:35,608 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-10-27 01:12:36,292 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-27 01:12:36,509 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-27 01:12:36,985 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-27 01:12:37,178 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-10-27 01:12:37,587 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-27 01:12:37,773 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-27 01:12:38,107 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-27 01:12:38,307 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-27 01:12:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:38,771 INFO L93 Difference]: Finished difference Result 1100 states and 1397 transitions. [2020-10-27 01:12:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:12:38,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-27 01:12:38,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:38,777 INFO L225 Difference]: With dead ends: 1100 [2020-10-27 01:12:38,777 INFO L226 Difference]: Without dead ends: 1096 [2020-10-27 01:12:38,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=392, Invalid=2364, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:12:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states.