/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-properties/list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:44:12,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:44:12,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:44:12,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:44:12,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:44:12,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:44:12,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:44:12,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:44:12,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:44:12,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:44:12,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:44:12,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:44:12,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:44:12,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:44:12,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:44:12,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:44:12,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:44:12,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:44:12,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:44:12,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:44:12,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:44:12,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:44:12,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:44:12,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:44:13,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:44:13,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:44:13,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:44:13,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:44:13,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:44:13,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:44:13,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:44:13,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:44:13,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:44:13,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:44:13,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:44:13,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:44:13,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:44:13,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:44:13,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:44:13,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:44:13,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:44:13,023 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 [2020-10-28 14:44:13,073 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:44:13,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:44:13,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:44:13,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:44:13,077 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:44:13,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:44:13,078 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:44:13,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:44:13,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:44:13,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:44:13,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:44:13,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:44:13,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:44:13,080 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:44:13,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:44:13,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:44:13,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:44:13,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:44:13,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:44:13,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:44:13,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:44:13,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:44:13,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:44:13,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:44:13,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:44:13,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:44:13,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:44:13,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:44:13,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:44:13,083 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:44:13,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:44:13,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:44:13,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:44:13,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:44:13,530 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:44:13,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-1.i [2020-10-28 14:44:13,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8033563b5/b66a7946568d4144ad1534c2352d2e05/FLAG529d81505 [2020-10-28 14:44:14,234 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:44:14,235 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-1.i [2020-10-28 14:44:14,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8033563b5/b66a7946568d4144ad1534c2352d2e05/FLAG529d81505 [2020-10-28 14:44:14,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8033563b5/b66a7946568d4144ad1534c2352d2e05 [2020-10-28 14:44:14,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:44:14,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:44:14,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:44:14,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:44:14,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:44:14,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:44:14" (1/1) ... [2020-10-28 14:44:14,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1841c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:14, skipping insertion in model container [2020-10-28 14:44:14,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:44:14" (1/1) ... [2020-10-28 14:44:14,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:44:14,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:44:14,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:44:14,970 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:44:15,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:44:15,115 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:44:15,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15 WrapperNode [2020-10-28 14:44:15,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:44:15,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:44:15,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:44:15,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:44:15,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15" (1/1) ... [2020-10-28 14:44:15,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15" (1/1) ... [2020-10-28 14:44:15,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15" (1/1) ... [2020-10-28 14:44:15,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15" (1/1) ... [2020-10-28 14:44:15,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15" (1/1) ... [2020-10-28 14:44:15,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15" (1/1) ... [2020-10-28 14:44:15,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15" (1/1) ... [2020-10-28 14:44:15,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:44:15,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:44:15,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:44:15,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:44:15,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15" (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 [2020-10-28 14:44:15,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:44:15,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:44:15,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:44:15,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:44:15,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:44:15,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-28 14:44:15,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-28 14:44:15,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-28 14:44:15,266 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:44:15,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:44:15,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:44:15,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:44:15,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:44:15,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:44:15,267 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:44:15,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:44:15,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:44:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:44:15,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:44:15,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:44:15,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:44:15,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:44:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:44:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:44:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:44:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:44:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-28 14:44:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-28 14:44:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-28 14:44:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:44:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:44:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:44:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:44:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:44:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:44:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:44:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:44:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:44:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:44:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:44:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:44:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:44:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:44:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:44:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:44:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:44:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:44:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:44:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:44:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:44:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:44:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:44:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:44:15,279 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:44:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:44:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:44:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:44:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:44:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:44:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:44:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:44:15,281 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:44:15,281 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:44:15,281 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:44:15,281 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:44:15,281 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:44:15,281 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:44:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:44:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:44:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:44:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:44:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:44:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:44:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:44:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:44:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:44:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:44:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:44:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:44:15,284 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:44:15,284 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:44:15,284 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:44:15,284 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:44:15,284 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:44:15,284 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:44:15,284 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:44:15,284 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:44:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:44:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:44:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:44:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:44:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:44:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:44:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:44:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:44:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:44:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:44:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:44:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:44:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:44:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:44:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:44:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:44:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:44:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:44:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:44:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:44:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:44:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:44:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:44:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:44:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:44:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:44:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:44:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:44:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:44:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:44:15,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:44:15,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:44:15,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:44:15,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:44:15,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:44:15,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:44:15,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:44:15,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:44:15,675 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:44:15,855 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:44:15,855 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 14:44:15,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:44:15 BoogieIcfgContainer [2020-10-28 14:44:15,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:44:15,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:44:15,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:44:15,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:44:15,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:44:14" (1/3) ... [2020-10-28 14:44:15,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3472eab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:44:15, skipping insertion in model container [2020-10-28 14:44:15,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:15" (2/3) ... [2020-10-28 14:44:15,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3472eab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:44:15, skipping insertion in model container [2020-10-28 14:44:15,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:44:15" (3/3) ... [2020-10-28 14:44:15,868 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2020-10-28 14:44:15,880 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:44:15,884 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:44:15,897 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:44:15,939 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:44:15,939 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:44:15,939 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:44:15,940 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:44:15,940 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:44:15,940 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:44:15,940 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:44:15,940 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:44:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-28 14:44:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:44:15,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:15,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:15,976 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash 620344659, now seen corresponding path program 1 times [2020-10-28 14:44:15,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:15,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371567837] [2020-10-28 14:44:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:16,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:16,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:16,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:16,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:16,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:16,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:44:16,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:44:16,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-28 14:44:16,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:16,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:16,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:16,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:44:16,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:16,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:44:16,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:16,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:16,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:16,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:16,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 14:44:16,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:16,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:16,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:16,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:16,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:16,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:16,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371567837] [2020-10-28 14:44:16,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:16,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:44:16,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065889892] [2020-10-28 14:44:16,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:44:16,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:16,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:44:16,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:44:16,803 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-28 14:44:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:16,943 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2020-10-28 14:44:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:44:16,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 14:44:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:16,952 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:44:16,953 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:44:16,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:44:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:44:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 14:44:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:44:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 14:44:16,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2020-10-28 14:44:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:16,997 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 14:44:16,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:44:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 14:44:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:44:16,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:16,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:16,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:44:16,999 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:17,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1278182859, now seen corresponding path program 1 times [2020-10-28 14:44:17,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:17,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581937419] [2020-10-28 14:44:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:17,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:17,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:44:17,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:17,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-28 14:44:17,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:17,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:44:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:44:17,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:17,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:17,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:17,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:17,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:17,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:44:17,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:17,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:17,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:17,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:17,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:17,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:17,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581937419] [2020-10-28 14:44:17,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:17,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:44:17,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17907050] [2020-10-28 14:44:17,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:44:17,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:17,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:44:17,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:44:17,195 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-10-28 14:44:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:17,326 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-28 14:44:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:44:17,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 14:44:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:17,330 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:44:17,330 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:44:17,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:44:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:44:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-28 14:44:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:44:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 14:44:17,341 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 22 [2020-10-28 14:44:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:17,341 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 14:44:17,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:44:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 14:44:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:44:17,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:17,344 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:17,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:44:17,345 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash -511611450, now seen corresponding path program 1 times [2020-10-28 14:44:17,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:17,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924162394] [2020-10-28 14:44:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:17,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:17,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:44:17,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:17,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-28 14:44:17,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:17,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:17,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:44:17,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:17,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:44:17,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:17,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:17,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:17,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:17,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:17,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:44:17,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:17,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:17,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:17,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:17,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924162394] [2020-10-28 14:44:17,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:17,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:44:17,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285444146] [2020-10-28 14:44:17,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:44:17,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:17,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:44:17,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:44:17,556 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-28 14:44:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:17,679 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-28 14:44:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:44:17,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 14:44:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:17,680 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:44:17,681 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:44:17,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:44:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:44:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-10-28 14:44:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:44:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-28 14:44:17,689 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2020-10-28 14:44:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:17,689 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-28 14:44:17,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:44:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-28 14:44:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:44:17,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:17,690 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:17,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:44:17,691 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:17,691 INFO L82 PathProgramCache]: Analyzing trace with hash 680437702, now seen corresponding path program 1 times [2020-10-28 14:44:17,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:17,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362834374] [2020-10-28 14:44:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:17,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:44:17,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:17,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 14:44:17,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:17,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:17,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:44:17,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:17,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:44:17,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:17,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:17,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:17,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:17,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:17,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:44:17,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:17,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:17,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:17,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362834374] [2020-10-28 14:44:17,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:17,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:44:17,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592698355] [2020-10-28 14:44:17,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:44:17,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:44:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:44:17,847 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-10-28 14:44:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:17,965 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-28 14:44:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:44:17,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 14:44:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:17,967 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:44:17,967 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:44:17,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:44:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:44:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-28 14:44:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:44:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-28 14:44:17,973 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-10-28 14:44:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:17,974 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-28 14:44:17,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:44:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-28 14:44:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:44:17,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:17,975 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:17,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:44:17,975 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:17,976 INFO L82 PathProgramCache]: Analyzing trace with hash 134346418, now seen corresponding path program 1 times [2020-10-28 14:44:17,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:17,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070434265] [2020-10-28 14:44:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:18,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:18,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:44:18,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:18,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-28 14:44:18,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:18,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:18,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:18,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:18,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:44:18,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:18,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:18,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:18,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:18,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:18,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:44:18,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:18,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:18,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:18,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:18,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:18,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:18,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070434265] [2020-10-28 14:44:18,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:18,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:18,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017337486] [2020-10-28 14:44:18,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:18,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:18,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:18,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:18,405 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 10 states. [2020-10-28 14:44:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:18,616 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-28 14:44:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:44:18,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 14:44:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:18,618 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:44:18,618 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:44:18,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:44:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-28 14:44:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:44:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-28 14:44:18,625 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 26 [2020-10-28 14:44:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:18,626 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-28 14:44:18,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-28 14:44:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:44:18,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:18,627 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:18,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:44:18,627 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:18,628 INFO L82 PathProgramCache]: Analyzing trace with hash 934657394, now seen corresponding path program 1 times [2020-10-28 14:44:18,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:18,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716284483] [2020-10-28 14:44:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:18,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:44:18,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:18,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-28 14:44:18,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:18,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:44:18,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:19,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:19,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:19,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:19,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:19,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:19,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:19,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:19,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:19,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:19,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:19,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:19,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716284483] [2020-10-28 14:44:19,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:19,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:19,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982512024] [2020-10-28 14:44:19,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:19,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:19,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:19,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:19,029 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 10 states. [2020-10-28 14:44:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:19,298 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-28 14:44:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:44:19,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 14:44:19,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:19,300 INFO L225 Difference]: With dead ends: 66 [2020-10-28 14:44:19,300 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:44:19,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:44:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-28 14:44:19,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:44:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-28 14:44:19,307 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 26 [2020-10-28 14:44:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:19,308 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-28 14:44:19,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-28 14:44:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:44:19,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:19,309 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:19,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:44:19,310 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:19,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash -226803475, now seen corresponding path program 1 times [2020-10-28 14:44:19,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:19,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200676900] [2020-10-28 14:44:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:19,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:19,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:19,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:44:19,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:19,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-28 14:44:19,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:19,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:19,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:19,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:19,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:44:19,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:19,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:19,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:19,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:19,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:19,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:19,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:19,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:19,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:19,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:44:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:19,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200676900] [2020-10-28 14:44:19,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:19,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:19,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702210755] [2020-10-28 14:44:19,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:19,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:19,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:19,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:19,632 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 10 states. [2020-10-28 14:44:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:19,967 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-28 14:44:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:44:19,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-28 14:44:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:19,968 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:44:19,968 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:44:19,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:44:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-28 14:44:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:44:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-28 14:44:19,977 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 28 [2020-10-28 14:44:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:19,977 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-28 14:44:19,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-28 14:44:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:44:19,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:19,979 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:19,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:44:19,979 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:19,980 INFO L82 PathProgramCache]: Analyzing trace with hash 600500328, now seen corresponding path program 2 times [2020-10-28 14:44:19,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:19,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950682744] [2020-10-28 14:44:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:20,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:20,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:44:20,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:20,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-28 14:44:20,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:20,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:20,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:20,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:20,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:44:20,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:20,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:20,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:20,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:20,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:20,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:44:20,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:20,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:20,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:20,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:20,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:20,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:20,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950682744] [2020-10-28 14:44:20,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:20,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:20,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179647575] [2020-10-28 14:44:20,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:20,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:20,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:20,303 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 10 states. [2020-10-28 14:44:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:20,613 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-28 14:44:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:44:20,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-28 14:44:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:20,614 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:44:20,615 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:44:20,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:44:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-28 14:44:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:44:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-28 14:44:20,622 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2020-10-28 14:44:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:20,622 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-28 14:44:20,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-28 14:44:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:44:20,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:20,623 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:20,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:44:20,624 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash 595516520, now seen corresponding path program 1 times [2020-10-28 14:44:20,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:20,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517429520] [2020-10-28 14:44:20,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:20,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:20,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:44:20,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 14:44:20,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:20,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:44:20,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:21,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:21,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:21,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:21,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:21,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:21,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:21,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:21,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:21,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:21,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:21,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517429520] [2020-10-28 14:44:21,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:21,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199045131] [2020-10-28 14:44:21,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:21,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:21,051 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2020-10-28 14:44:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:21,375 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-28 14:44:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:44:21,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-28 14:44:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:21,377 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:44:21,377 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:44:21,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:44:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-28 14:44:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:44:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 14:44:21,383 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 30 [2020-10-28 14:44:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:21,383 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 14:44:21,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 14:44:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:44:21,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:21,384 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:21,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:44:21,384 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:21,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1043096551, now seen corresponding path program 2 times [2020-10-28 14:44:21,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:21,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480407862] [2020-10-28 14:44:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:21,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:21,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:21,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:44:21,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:21,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-28 14:44:21,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:21,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:21,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:44:21,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:21,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:44:21,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:21,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:21,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:21,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:21,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:21,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:21,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:21,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:21,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:21,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:21,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:21,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:21,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:21,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480407862] [2020-10-28 14:44:21,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:21,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:44:21,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141589640] [2020-10-28 14:44:21,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:44:21,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:44:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:44:21,718 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 11 states. [2020-10-28 14:44:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:22,025 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-28 14:44:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:44:22,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 14:44:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:22,027 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:44:22,027 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:44:22,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:44:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-10-28 14:44:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:44:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-28 14:44:22,033 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 30 [2020-10-28 14:44:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:22,034 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-28 14:44:22,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:44:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-28 14:44:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:44:22,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:22,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:22,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:44:22,035 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:22,036 INFO L82 PathProgramCache]: Analyzing trace with hash -792329511, now seen corresponding path program 1 times [2020-10-28 14:44:22,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:22,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008502680] [2020-10-28 14:44:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:22,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:22,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:22,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:44:22,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:22,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 14:44:22,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:22,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:22,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:44:22,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:22,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:44:22,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:22,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:22,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:22,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:22,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:22,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:22,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:22,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:22,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:22,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:22,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:22,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008502680] [2020-10-28 14:44:22,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:22,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:44:22,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451976509] [2020-10-28 14:44:22,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:44:22,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:44:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:44:22,412 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 11 states. [2020-10-28 14:44:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:22,647 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-28 14:44:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:44:22,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 14:44:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:22,648 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:44:22,648 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:44:22,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:44:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:44:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 14:44:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:44:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-28 14:44:22,654 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 30 [2020-10-28 14:44:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:22,654 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-28 14:44:22,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:44:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-28 14:44:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:44:22,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:22,655 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:22,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:44:22,655 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:22,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2121869460, now seen corresponding path program 3 times [2020-10-28 14:44:22,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:22,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790740172] [2020-10-28 14:44:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:22,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:22,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:22,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:44:22,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:22,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-28 14:44:22,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:22,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:44:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:44:22,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:44:23,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:23,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:23,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:23,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:23,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:23,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:23,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:23,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:23,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:23,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790740172] [2020-10-28 14:44:23,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:23,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:44:23,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201419147] [2020-10-28 14:44:23,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:44:23,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:23,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:44:23,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:44:23,182 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 12 states. [2020-10-28 14:44:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:23,871 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-28 14:44:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:44:23,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:44:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:23,873 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:44:23,873 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 14:44:23,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:44:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 14:44:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-10-28 14:44:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:44:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-28 14:44:23,889 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 32 [2020-10-28 14:44:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:23,889 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-28 14:44:23,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:44:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-28 14:44:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:44:23,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:23,891 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:23,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:44:23,894 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:23,895 INFO L82 PathProgramCache]: Analyzing trace with hash -212389868, now seen corresponding path program 1 times [2020-10-28 14:44:23,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:23,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860212877] [2020-10-28 14:44:23,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:23,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:24,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:24,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:44:24,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:24,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-28 14:44:24,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:24,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:24,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:44:24,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:24,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:44:24,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:24,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:24,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:24,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:24,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:24,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:44:24,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:24,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:24,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:24,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:24,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:24,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:24,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860212877] [2020-10-28 14:44:24,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:24,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:44:24,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383542161] [2020-10-28 14:44:24,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:44:24,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:44:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:44:24,385 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 12 states. [2020-10-28 14:44:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:24,922 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-10-28 14:44:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:44:24,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:44:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:24,924 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:44:24,924 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 14:44:24,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:44:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 14:44:24,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-28 14:44:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 14:44:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-28 14:44:24,943 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 32 [2020-10-28 14:44:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:24,944 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-28 14:44:24,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:44:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-28 14:44:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:44:24,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:24,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:24,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:44:24,947 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1477606833, now seen corresponding path program 4 times [2020-10-28 14:44:24,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:24,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703113842] [2020-10-28 14:44:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:24,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:25,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:25,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:44:25,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:25,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-28 14:44:25,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:25,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:44:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:44:25,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:25,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:25,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:25,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:25,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:25,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:25,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:44:25,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:25,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:25,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:44:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:25,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703113842] [2020-10-28 14:44:25,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:25,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:44:25,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209719988] [2020-10-28 14:44:25,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:44:25,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:25,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:44:25,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:44:25,636 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 13 states. [2020-10-28 14:44:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:26,241 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-10-28 14:44:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:44:26,242 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-28 14:44:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:26,243 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:44:26,243 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 14:44:26,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:44:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 14:44:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-10-28 14:44:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 14:44:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-10-28 14:44:26,255 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 34 [2020-10-28 14:44:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:26,255 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-10-28 14:44:26,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:44:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-10-28 14:44:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:44:26,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:26,256 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:26,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:44:26,257 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:26,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:26,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1169316170, now seen corresponding path program 5 times [2020-10-28 14:44:26,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:26,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709222703] [2020-10-28 14:44:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:26,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:26,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:26,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:44:26,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:26,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-28 14:44:26,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:26,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:26,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:44:26,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:44:26,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:26,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:26,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:26,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:26,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:26,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:26,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:26,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:26,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:26,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:26,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709222703] [2020-10-28 14:44:26,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:26,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:44:26,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272026638] [2020-10-28 14:44:26,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:44:26,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:26,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:44:26,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:44:26,815 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 13 states. [2020-10-28 14:44:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:27,380 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2020-10-28 14:44:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:44:27,380 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-28 14:44:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:27,382 INFO L225 Difference]: With dead ends: 101 [2020-10-28 14:44:27,382 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 14:44:27,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:44:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 14:44:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-28 14:44:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 14:44:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-28 14:44:27,395 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 36 [2020-10-28 14:44:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:27,395 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-28 14:44:27,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:44:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-28 14:44:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:44:27,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:27,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:27,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:44:27,400 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1866893130, now seen corresponding path program 2 times [2020-10-28 14:44:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:27,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633590526] [2020-10-28 14:44:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:27,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:27,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:27,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:27,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:27,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:28,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:28,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:44:28,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:44:28,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1193 [2020-10-28 14:44:28,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:28,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:28,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:44:28,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:28,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:44:28,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:28,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:28,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:28,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:28,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:28,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:28,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:28,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:28,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:28,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:28,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:28,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:28,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:28,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633590526] [2020-10-28 14:44:28,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:28,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:44:28,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042081591] [2020-10-28 14:44:28,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:44:28,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:28,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:44:28,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:44:28,957 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 13 states. [2020-10-28 14:44:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:29,510 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-10-28 14:44:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:44:29,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-28 14:44:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:29,512 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:44:29,512 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 14:44:29,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:44:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 14:44:29,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-28 14:44:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:44:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-28 14:44:29,517 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 36 [2020-10-28 14:44:29,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:29,517 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-28 14:44:29,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:44:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-28 14:44:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:44:29,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:29,518 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:29,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:44:29,519 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2074286917, now seen corresponding path program 6 times [2020-10-28 14:44:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:29,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57716492] [2020-10-28 14:44:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:29,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:29,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:29,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:44:29,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:29,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-28 14:44:29,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:29,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:29,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:44:29,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:29,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:44:29,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:30,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:30,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:30,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:30,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:30,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:30,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:30,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:30,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:30,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:30,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:30,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:30,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57716492] [2020-10-28 14:44:30,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:30,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:44:30,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256666424] [2020-10-28 14:44:30,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:44:30,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:30,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:44:30,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:44:30,472 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 14 states. [2020-10-28 14:44:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:31,224 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-28 14:44:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:44:31,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-28 14:44:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:31,227 INFO L225 Difference]: With dead ends: 96 [2020-10-28 14:44:31,227 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 14:44:31,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:44:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 14:44:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2020-10-28 14:44:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:44:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-28 14:44:31,237 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 36 [2020-10-28 14:44:31,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:31,237 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-28 14:44:31,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:44:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-28 14:44:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:44:31,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:31,241 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:31,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:44:31,242 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash -518509509, now seen corresponding path program 1 times [2020-10-28 14:44:31,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:31,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521545277] [2020-10-28 14:44:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:31,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:31,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:31,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:44:31,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:31,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-28 14:44:31,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:31,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:31,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:44:31,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:31,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:44:31,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:31,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:31,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:31,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:31,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:31,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:31,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:31,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:31,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:31,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:31,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:31,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:31,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:31,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521545277] [2020-10-28 14:44:31,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:31,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:44:31,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416606230] [2020-10-28 14:44:31,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:44:31,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:44:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:44:31,995 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 14 states. [2020-10-28 14:44:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:32,690 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-10-28 14:44:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:44:32,690 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-28 14:44:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:32,691 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:44:32,691 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:44:32,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:44:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:44:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-10-28 14:44:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 14:44:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-10-28 14:44:32,699 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 36 [2020-10-28 14:44:32,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:32,699 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-10-28 14:44:32,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:44:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-10-28 14:44:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:44:32,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:32,700 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:32,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:44:32,700 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:32,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:32,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1009594186, now seen corresponding path program 7 times [2020-10-28 14:44:32,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:32,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855373079] [2020-10-28 14:44:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:32,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:33,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:33,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:44:33,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:33,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-28 14:44:33,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:33,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:33,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:44:33,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:33,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:44:33,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:33,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:33,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:33,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:33,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:33,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:33,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:33,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:33,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:33,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855373079] [2020-10-28 14:44:33,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:33,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:44:33,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207761587] [2020-10-28 14:44:33,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:44:33,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:33,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:44:33,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:33,451 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 15 states. [2020-10-28 14:44:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:34,454 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2020-10-28 14:44:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:44:34,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-28 14:44:34,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:34,456 INFO L225 Difference]: With dead ends: 122 [2020-10-28 14:44:34,456 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 14:44:34,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:44:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 14:44:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2020-10-28 14:44:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:44:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2020-10-28 14:44:34,464 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 38 [2020-10-28 14:44:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:34,464 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2020-10-28 14:44:34,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:44:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2020-10-28 14:44:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:44:34,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:34,465 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:34,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:44:34,465 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:34,466 INFO L82 PathProgramCache]: Analyzing trace with hash 886692086, now seen corresponding path program 2 times [2020-10-28 14:44:34,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:34,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573195717] [2020-10-28 14:44:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:34,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:34,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:34,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:44:34,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:34,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-28 14:44:34,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:34,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:44:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:44:34,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:35,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:35,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:35,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:35,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:35,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:35,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:35,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:35,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:35,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:35,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573195717] [2020-10-28 14:44:35,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:35,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:44:35,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831566839] [2020-10-28 14:44:35,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:44:35,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:35,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:44:35,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:35,400 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 15 states. [2020-10-28 14:44:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:36,234 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2020-10-28 14:44:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:44:36,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-28 14:44:36,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:36,236 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:44:36,236 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:44:36,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:44:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:44:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2020-10-28 14:44:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 14:44:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2020-10-28 14:44:36,252 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 38 [2020-10-28 14:44:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:36,252 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2020-10-28 14:44:36,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:44:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2020-10-28 14:44:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:44:36,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:36,257 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:36,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:44:36,258 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:36,258 INFO L82 PathProgramCache]: Analyzing trace with hash -42096143, now seen corresponding path program 8 times [2020-10-28 14:44:36,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:36,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450305975] [2020-10-28 14:44:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:36,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:36,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:44:36,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:36,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-28 14:44:36,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:36,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:44:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:44:36,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:37,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:37,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:37,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:37,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:37,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:37,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:37,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:37,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:37,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:37,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:37,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:37,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:37,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450305975] [2020-10-28 14:44:37,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:37,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:44:37,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211622020] [2020-10-28 14:44:37,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:44:37,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:44:37,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:44:37,303 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand 16 states. [2020-10-28 14:44:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:38,222 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2020-10-28 14:44:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:44:38,223 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-28 14:44:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:38,224 INFO L225 Difference]: With dead ends: 139 [2020-10-28 14:44:38,224 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 14:44:38,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:44:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 14:44:38,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2020-10-28 14:44:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 14:44:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2020-10-28 14:44:38,234 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 40 [2020-10-28 14:44:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:38,235 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2020-10-28 14:44:38,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:44:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2020-10-28 14:44:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:44:38,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:38,236 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:38,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:44:38,236 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1009268066, now seen corresponding path program 9 times [2020-10-28 14:44:38,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:38,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815485375] [2020-10-28 14:44:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:38,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:38,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:38,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:44:38,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:38,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-28 14:44:38,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:38,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:44:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:38,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:44:38,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:39,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:39,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:39,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:39,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:39,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:39,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:39,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:39,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:39,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:39,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:44:39,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815485375] [2020-10-28 14:44:39,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:39,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:44:39,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858034140] [2020-10-28 14:44:39,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:44:39,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:44:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:39,106 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 15 states. [2020-10-28 14:44:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:39,577 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2020-10-28 14:44:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:44:39,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-28 14:44:39,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:39,581 INFO L225 Difference]: With dead ends: 135 [2020-10-28 14:44:39,581 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:44:39,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:44:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:44:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2020-10-28 14:44:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 14:44:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2020-10-28 14:44:39,597 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 40 [2020-10-28 14:44:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:39,597 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2020-10-28 14:44:39,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:44:39,598 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2020-10-28 14:44:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:44:39,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:39,598 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:39,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:44:39,599 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2010587244, now seen corresponding path program 10 times [2020-10-28 14:44:39,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:39,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562505742] [2020-10-28 14:44:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:39,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:40,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:40,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:44:40,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:40,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-28 14:44:40,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:40,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:40,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:44:40,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:40,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:44:40,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:40,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:40,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:40,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:40,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:40,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:40,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:40,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:40,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:40,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:40,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:40,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:40,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:40,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562505742] [2020-10-28 14:44:40,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:40,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:44:40,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994163547] [2020-10-28 14:44:40,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:44:40,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:40,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:44:40,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:44:40,733 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 16 states. [2020-10-28 14:44:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:41,864 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2020-10-28 14:44:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:44:41,864 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-28 14:44:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:41,866 INFO L225 Difference]: With dead ends: 145 [2020-10-28 14:44:41,866 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:44:41,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:44:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:44:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2020-10-28 14:44:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 14:44:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-28 14:44:41,879 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 42 [2020-10-28 14:44:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:41,879 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-28 14:44:41,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:44:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-28 14:44:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:44:41,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:41,880 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:41,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:44:41,880 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -735770516, now seen corresponding path program 3 times [2020-10-28 14:44:41,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:41,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874426973] [2020-10-28 14:44:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:41,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:42,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:42,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:42,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:43,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:43,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:45,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:45,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:44:45,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:44:45,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4045 [2020-10-28 14:44:45,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:45,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:45,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:44:45,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:45,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:44:45,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:46,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:46,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:46,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:46,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:46,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:46,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:46,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:46,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:46,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:46,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:46,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:46,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:46,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874426973] [2020-10-28 14:44:46,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:46,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:44:46,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496481315] [2020-10-28 14:44:46,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:44:46,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:46,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:44:46,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:44:46,585 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 16 states. [2020-10-28 14:44:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:47,572 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2020-10-28 14:44:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:44:47,572 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-28 14:44:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:47,573 INFO L225 Difference]: With dead ends: 122 [2020-10-28 14:44:47,573 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:44:47,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:44:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:44:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-10-28 14:44:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 14:44:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-10-28 14:44:47,581 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 42 [2020-10-28 14:44:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:47,581 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-10-28 14:44:47,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:44:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-10-28 14:44:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:44:47,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:47,582 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:47,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:44:47,582 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1240689763, now seen corresponding path program 11 times [2020-10-28 14:44:47,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:47,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283824058] [2020-10-28 14:44:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:47,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:48,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:48,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:44:48,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:48,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-28 14:44:48,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:48,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:48,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:44:48,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:48,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:44:48,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:48,598 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-28 14:44:48,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:48,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:48,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:48,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:48,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:48,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:48,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:48,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:48,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:48,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:48,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:48,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:48,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283824058] [2020-10-28 14:44:48,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:48,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:44:48,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986715483] [2020-10-28 14:44:48,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:44:48,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:44:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:44:48,972 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 17 states. [2020-10-28 14:44:49,919 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-28 14:44:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:50,393 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2020-10-28 14:44:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:44:50,394 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-28 14:44:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:50,395 INFO L225 Difference]: With dead ends: 142 [2020-10-28 14:44:50,395 INFO L226 Difference]: Without dead ends: 136 [2020-10-28 14:44:50,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:44:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-28 14:44:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2020-10-28 14:44:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 14:44:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2020-10-28 14:44:50,405 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 42 [2020-10-28 14:44:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:50,406 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2020-10-28 14:44:50,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:44:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2020-10-28 14:44:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:44:50,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:50,407 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:50,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:44:50,407 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:50,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1659861981, now seen corresponding path program 2 times [2020-10-28 14:44:50,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:50,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254737590] [2020-10-28 14:44:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:50,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:50,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:50,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:44:50,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-28 14:44:50,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:50,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:44:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:44:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:51,223 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-28 14:44:51,434 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-28 14:44:51,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:51,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:51,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:51,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:51,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:51,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:51,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:51,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:51,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:51,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254737590] [2020-10-28 14:44:51,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:51,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:44:51,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597240454] [2020-10-28 14:44:51,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:44:51,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:51,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:44:51,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:44:51,765 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand 17 states. [2020-10-28 14:44:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:53,068 INFO L93 Difference]: Finished difference Result 145 states and 163 transitions. [2020-10-28 14:44:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:44:53,069 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-28 14:44:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:53,070 INFO L225 Difference]: With dead ends: 145 [2020-10-28 14:44:53,070 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 14:44:53,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:44:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 14:44:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2020-10-28 14:44:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:44:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2020-10-28 14:44:53,082 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 42 [2020-10-28 14:44:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:53,082 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2020-10-28 14:44:53,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:44:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2020-10-28 14:44:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:44:53,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:53,083 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:53,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:44:53,083 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1213353752, now seen corresponding path program 12 times [2020-10-28 14:44:53,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:53,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385366225] [2020-10-28 14:44:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:53,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:53,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:53,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:44:53,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:53,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-28 14:44:53,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:53,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:53,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:44:53,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:53,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:44:53,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:54,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:54,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:54,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:54,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:54,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:54,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:54,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:54,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:54,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:54,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:54,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:54,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385366225] [2020-10-28 14:44:54,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:54,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:44:54,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438792911] [2020-10-28 14:44:54,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:44:54,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:54,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:44:54,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:44:54,455 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand 18 states. [2020-10-28 14:44:55,428 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-28 14:44:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:56,057 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2020-10-28 14:44:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:44:56,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-28 14:44:56,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:56,060 INFO L225 Difference]: With dead ends: 170 [2020-10-28 14:44:56,060 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 14:44:56,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:44:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 14:44:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 142. [2020-10-28 14:44:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:44:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2020-10-28 14:44:56,073 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 44 [2020-10-28 14:44:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:56,073 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2020-10-28 14:44:56,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:44:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2020-10-28 14:44:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:44:56,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:56,074 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:56,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:44:56,075 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:56,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1424156648, now seen corresponding path program 3 times [2020-10-28 14:44:56,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:56,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543195683] [2020-10-28 14:44:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:56,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:56,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:56,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:44:56,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:56,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-28 14:44:56,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:56,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:56,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:44:56,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:56,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:44:56,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:57,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:57,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:57,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:57,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:57,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:57,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:57,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:57,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:57,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:57,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:57,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:57,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543195683] [2020-10-28 14:44:57,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:57,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:44:57,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816220670] [2020-10-28 14:44:57,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:44:57,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:57,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:44:57,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:44:57,241 INFO L87 Difference]: Start difference. First operand 142 states and 160 transitions. Second operand 18 states. [2020-10-28 14:44:58,382 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-28 14:44:59,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:59,056 INFO L93 Difference]: Finished difference Result 177 states and 199 transitions. [2020-10-28 14:44:59,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:44:59,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-28 14:44:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:59,058 INFO L225 Difference]: With dead ends: 177 [2020-10-28 14:44:59,058 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 14:44:59,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:44:59,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 14:44:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 151. [2020-10-28 14:44:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 14:44:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2020-10-28 14:44:59,071 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 44 [2020-10-28 14:44:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:59,071 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2020-10-28 14:44:59,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:44:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2020-10-28 14:44:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:44:59,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:59,072 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:59,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:44:59,073 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:59,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1612126163, now seen corresponding path program 13 times [2020-10-28 14:44:59,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:59,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184008108] [2020-10-28 14:44:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:59,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:59,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:59,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:44:59,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:59,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 582 [2020-10-28 14:44:59,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:59,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:44:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:59,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:44:59,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:00,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:00,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:00,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:00,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:00,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:00,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:45:00,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:00,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:00,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:00,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:00,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184008108] [2020-10-28 14:45:00,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:00,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:45:00,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354918547] [2020-10-28 14:45:00,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:45:00,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:00,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:45:00,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:45:00,547 INFO L87 Difference]: Start difference. First operand 151 states and 171 transitions. Second operand 19 states. [2020-10-28 14:45:01,513 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-28 14:45:02,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:02,424 INFO L93 Difference]: Finished difference Result 189 states and 212 transitions. [2020-10-28 14:45:02,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:45:02,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-28 14:45:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:02,426 INFO L225 Difference]: With dead ends: 189 [2020-10-28 14:45:02,426 INFO L226 Difference]: Without dead ends: 183 [2020-10-28 14:45:02,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:45:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-28 14:45:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 161. [2020-10-28 14:45:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-28 14:45:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2020-10-28 14:45:02,442 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 46 [2020-10-28 14:45:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:02,442 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2020-10-28 14:45:02,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:45:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2020-10-28 14:45:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:45:02,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:02,443 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:02,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:45:02,443 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:02,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1639150844, now seen corresponding path program 14 times [2020-10-28 14:45:02,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:02,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150563600] [2020-10-28 14:45:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:02,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:02,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:02,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:45:02,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:02,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-28 14:45:02,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:02,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:02,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:45:02,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:02,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:45:02,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:03,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:03,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:03,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:03,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:03,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:03,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:45:03,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:03,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:03,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:03,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:03,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:03,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:45:03,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150563600] [2020-10-28 14:45:03,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:03,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:45:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187235499] [2020-10-28 14:45:03,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:45:03,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:03,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:45:03,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:45:03,586 INFO L87 Difference]: Start difference. First operand 161 states and 182 transitions. Second operand 18 states. [2020-10-28 14:45:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:04,922 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2020-10-28 14:45:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:45:04,922 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-28 14:45:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:04,934 INFO L225 Difference]: With dead ends: 185 [2020-10-28 14:45:04,934 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 14:45:04,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:45:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 14:45:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2020-10-28 14:45:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-28 14:45:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2020-10-28 14:45:04,950 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 46 [2020-10-28 14:45:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:04,951 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2020-10-28 14:45:04,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:45:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2020-10-28 14:45:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:45:04,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:04,952 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:04,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:45:04,952 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:04,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1714643506, now seen corresponding path program 15 times [2020-10-28 14:45:04,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:04,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329368299] [2020-10-28 14:45:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:05,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:05,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:05,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:45:05,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:05,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-28 14:45:05,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:05,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:05,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:45:05,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:05,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:45:05,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:06,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:06,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:06,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:06,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:06,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:06,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:06,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:06,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:06,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:45:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:06,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329368299] [2020-10-28 14:45:06,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:06,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:45:06,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967734834] [2020-10-28 14:45:06,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:45:06,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:06,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:45:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:45:06,476 INFO L87 Difference]: Start difference. First operand 161 states and 182 transitions. Second operand 19 states. [2020-10-28 14:45:07,460 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-28 14:45:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:08,275 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2020-10-28 14:45:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:45:08,276 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-28 14:45:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:08,278 INFO L225 Difference]: With dead ends: 197 [2020-10-28 14:45:08,278 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 14:45:08,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:45:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 14:45:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2020-10-28 14:45:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 14:45:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2020-10-28 14:45:08,291 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 48 [2020-10-28 14:45:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:08,291 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2020-10-28 14:45:08,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:45:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2020-10-28 14:45:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:45:08,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:08,292 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:08,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:45:08,292 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1632485326, now seen corresponding path program 4 times [2020-10-28 14:45:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:08,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361606714] [2020-10-28 14:45:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:08,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:08,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:08,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:08,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:09,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:10,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:10,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:11,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:13,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:13,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:45:13,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:45:13,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:45:13,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:13,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:45:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:45:13,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:13,789 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-28 14:45:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:14,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:14,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:14,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:14,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:14,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:14,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361606714] [2020-10-28 14:45:14,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:14,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:45:14,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217009606] [2020-10-28 14:45:14,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:45:14,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:14,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:45:14,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:45:14,371 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand 19 states. [2020-10-28 14:45:15,030 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-28 14:45:15,420 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-28 14:45:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:16,190 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2020-10-28 14:45:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:45:16,191 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-28 14:45:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:16,192 INFO L225 Difference]: With dead ends: 163 [2020-10-28 14:45:16,193 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 14:45:16,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:45:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 14:45:16,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2020-10-28 14:45:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 14:45:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2020-10-28 14:45:16,202 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 48 [2020-10-28 14:45:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:16,203 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2020-10-28 14:45:16,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:45:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2020-10-28 14:45:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:45:16,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:16,203 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:16,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:45:16,204 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash 544344255, now seen corresponding path program 16 times [2020-10-28 14:45:16,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:16,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862776891] [2020-10-28 14:45:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:16,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:17,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:17,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:45:17,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:17,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-28 14:45:17,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:17,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:17,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:45:17,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:17,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:45:17,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:17,538 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-28 14:45:17,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:17,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:17,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:17,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:17,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:17,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:17,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:17,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:17,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:17,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862776891] [2020-10-28 14:45:17,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:17,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:45:17,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190544801] [2020-10-28 14:45:17,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:45:17,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:17,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:45:17,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:45:17,983 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand 20 states. [2020-10-28 14:45:19,117 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-28 14:45:19,331 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-28 14:45:19,519 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-28 14:45:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:20,207 INFO L93 Difference]: Finished difference Result 196 states and 218 transitions. [2020-10-28 14:45:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:45:20,208 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-28 14:45:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:20,210 INFO L225 Difference]: With dead ends: 196 [2020-10-28 14:45:20,210 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 14:45:20,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:45:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 14:45:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2020-10-28 14:45:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 14:45:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 183 transitions. [2020-10-28 14:45:20,224 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 183 transitions. Word has length 48 [2020-10-28 14:45:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:20,224 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 183 transitions. [2020-10-28 14:45:20,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:45:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 183 transitions. [2020-10-28 14:45:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:45:20,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:20,225 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:20,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:45:20,225 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:20,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2139663937, now seen corresponding path program 3 times [2020-10-28 14:45:20,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:20,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893407034] [2020-10-28 14:45:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:20,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:21,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:21,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:45:21,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:21,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-28 14:45:21,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:21,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:45:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:45:21,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:21,572 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-28 14:45:22,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:22,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:22,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:22,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:22,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:22,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:22,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:22,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:22,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:22,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:22,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:22,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:22,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893407034] [2020-10-28 14:45:22,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:22,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:45:22,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364822476] [2020-10-28 14:45:22,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:45:22,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:22,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:45:22,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:45:22,052 INFO L87 Difference]: Start difference. First operand 164 states and 183 transitions. Second operand 20 states. [2020-10-28 14:45:23,212 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-28 14:45:23,421 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-28 14:45:23,649 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-28 14:45:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:24,168 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2020-10-28 14:45:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:45:24,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-28 14:45:24,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:24,170 INFO L225 Difference]: With dead ends: 193 [2020-10-28 14:45:24,170 INFO L226 Difference]: Without dead ends: 185 [2020-10-28 14:45:24,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:45:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-28 14:45:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2020-10-28 14:45:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-28 14:45:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2020-10-28 14:45:24,185 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 48 [2020-10-28 14:45:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:24,185 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2020-10-28 14:45:24,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:45:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2020-10-28 14:45:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:45:24,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:24,186 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:24,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:45:24,186 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:24,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1355873350, now seen corresponding path program 17 times [2020-10-28 14:45:24,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:24,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237146835] [2020-10-28 14:45:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:24,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:25,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:25,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:45:25,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:25,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-10-28 14:45:25,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:25,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:45:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:45:25,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:25,618 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-28 14:45:25,906 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-28 14:45:26,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:26,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:26,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:26,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:26,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:26,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:26,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:26,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:26,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:26,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237146835] [2020-10-28 14:45:26,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:26,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:45:26,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519980838] [2020-10-28 14:45:26,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:45:26,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:26,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:45:26,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:45:26,502 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand 21 states. [2020-10-28 14:45:27,198 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-28 14:45:27,382 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-28 14:45:27,963 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-28 14:45:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:28,817 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2020-10-28 14:45:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:45:28,818 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-28 14:45:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:28,819 INFO L225 Difference]: With dead ends: 226 [2020-10-28 14:45:28,820 INFO L226 Difference]: Without dead ends: 220 [2020-10-28 14:45:28,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:45:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-28 14:45:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 188. [2020-10-28 14:45:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-28 14:45:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 210 transitions. [2020-10-28 14:45:28,836 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 210 transitions. Word has length 50 [2020-10-28 14:45:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:28,836 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 210 transitions. [2020-10-28 14:45:28,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:45:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 210 transitions. [2020-10-28 14:45:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:45:28,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:28,837 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:28,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:45:28,837 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:28,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1475628410, now seen corresponding path program 4 times [2020-10-28 14:45:28,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:28,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975290997] [2020-10-28 14:45:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:28,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:29,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:29,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:45:29,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:29,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-28 14:45:29,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:29,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:45:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:29,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:45:29,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:30,256 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-28 14:45:30,513 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-28 14:45:30,641 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-28 14:45:30,773 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-28 14:45:31,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:31,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:31,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:31,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:31,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:31,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:31,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:31,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:31,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:31,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:31,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975290997] [2020-10-28 14:45:31,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:31,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:45:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259077225] [2020-10-28 14:45:31,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:45:31,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:45:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:45:31,168 INFO L87 Difference]: Start difference. First operand 188 states and 210 transitions. Second operand 21 states. [2020-10-28 14:45:32,126 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-28 14:45:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:32,872 INFO L93 Difference]: Finished difference Result 227 states and 253 transitions. [2020-10-28 14:45:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:45:32,873 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-28 14:45:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:32,875 INFO L225 Difference]: With dead ends: 227 [2020-10-28 14:45:32,875 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 14:45:32,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:45:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 14:45:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2020-10-28 14:45:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-28 14:45:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 221 transitions. [2020-10-28 14:45:32,897 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 221 transitions. Word has length 50 [2020-10-28 14:45:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:32,897 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 221 transitions. [2020-10-28 14:45:32,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:45:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 221 transitions. [2020-10-28 14:45:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:45:32,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:32,898 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:32,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:45:32,899 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:32,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2103890955, now seen corresponding path program 18 times [2020-10-28 14:45:32,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:32,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17258749] [2020-10-28 14:45:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:32,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:33,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:33,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:45:33,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:33,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-28 14:45:33,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:33,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:33,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:45:33,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:33,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:45:33,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:34,205 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-28 14:45:34,468 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-28 14:45:34,616 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-28 14:45:34,762 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-28 14:45:35,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:35,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:35,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:35,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:35,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:35,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:45:35,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:35,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:35,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17258749] [2020-10-28 14:45:35,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:35,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:45:35,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514082987] [2020-10-28 14:45:35,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:45:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:35,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:45:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:45:35,376 INFO L87 Difference]: Start difference. First operand 197 states and 221 transitions. Second operand 22 states. [2020-10-28 14:45:35,901 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-28 14:45:36,326 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 14:45:36,545 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 14:45:36,815 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-28 14:45:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:37,946 INFO L93 Difference]: Finished difference Result 247 states and 275 transitions. [2020-10-28 14:45:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:45:37,946 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-28 14:45:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:37,948 INFO L225 Difference]: With dead ends: 247 [2020-10-28 14:45:37,949 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 14:45:37,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:45:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 14:45:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 209. [2020-10-28 14:45:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 14:45:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 234 transitions. [2020-10-28 14:45:37,975 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 234 transitions. Word has length 52 [2020-10-28 14:45:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:37,975 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 234 transitions. [2020-10-28 14:45:37,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:45:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 234 transitions. [2020-10-28 14:45:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:45:37,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:37,976 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:37,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:45:37,976 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash 155096806, now seen corresponding path program 19 times [2020-10-28 14:45:37,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:37,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430296486] [2020-10-28 14:45:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:38,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:39,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:39,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:45:39,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:39,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 993 [2020-10-28 14:45:39,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:39,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:39,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:45:39,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:39,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:45:39,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:39,563 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-28 14:45:39,695 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 14:45:39,875 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-28 14:45:40,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:40,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:40,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:40,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:40,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:45:40,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:40,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:40,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:40,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:40,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430296486] [2020-10-28 14:45:40,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:40,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:45:40,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221162333] [2020-10-28 14:45:40,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:45:40,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:45:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:45:40,324 INFO L87 Difference]: Start difference. First operand 209 states and 234 transitions. Second operand 22 states. [2020-10-28 14:45:41,160 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-28 14:45:41,539 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-28 14:45:41,711 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-28 14:45:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:42,208 INFO L93 Difference]: Finished difference Result 243 states and 272 transitions. [2020-10-28 14:45:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:45:42,209 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-28 14:45:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:42,211 INFO L225 Difference]: With dead ends: 243 [2020-10-28 14:45:42,211 INFO L226 Difference]: Without dead ends: 237 [2020-10-28 14:45:42,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:45:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-28 14:45:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 209. [2020-10-28 14:45:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 14:45:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 234 transitions. [2020-10-28 14:45:42,230 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 234 transitions. Word has length 52 [2020-10-28 14:45:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:42,230 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 234 transitions. [2020-10-28 14:45:42,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:45:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 234 transitions. [2020-10-28 14:45:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:45:42,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:42,231 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:42,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:45:42,231 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash 605696368, now seen corresponding path program 20 times [2020-10-28 14:45:42,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:42,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115877796] [2020-10-28 14:45:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:42,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:43,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:43,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:45:43,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:43,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 738 [2020-10-28 14:45:43,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:43,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:45:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:45:43,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:43,325 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-28 14:45:43,506 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 14:45:43,753 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-28 14:45:44,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:44,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:44,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:44,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:44,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:44,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:45:44,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:44,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:44,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:44,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:44,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:44,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:44,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115877796] [2020-10-28 14:45:44,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:44,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:45:44,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696413386] [2020-10-28 14:45:44,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:45:44,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:44,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:45:44,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:45:44,554 INFO L87 Difference]: Start difference. First operand 209 states and 234 transitions. Second operand 22 states. [2020-10-28 14:45:45,048 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 14:45:45,445 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:45:45,647 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 14:45:45,918 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-28 14:45:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:47,003 INFO L93 Difference]: Finished difference Result 257 states and 286 transitions. [2020-10-28 14:45:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:45:47,004 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-28 14:45:47,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:47,006 INFO L225 Difference]: With dead ends: 257 [2020-10-28 14:45:47,006 INFO L226 Difference]: Without dead ends: 237 [2020-10-28 14:45:47,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:45:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-28 14:45:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 180. [2020-10-28 14:45:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 14:45:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2020-10-28 14:45:47,024 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 54 [2020-10-28 14:45:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:47,024 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2020-10-28 14:45:47,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:45:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2020-10-28 14:45:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:45:47,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:47,025 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:47,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:45:47,025 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:47,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1458048368, now seen corresponding path program 5 times [2020-10-28 14:45:47,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:47,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118917874] [2020-10-28 14:45:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:47,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:47,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:47,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:47,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:48,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:48,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:52,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:52,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:45:52,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:45:52,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:45:52,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:52,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:52,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:45:52,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:45:52,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:45:52,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:52,868 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 14:45:53,197 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-10-28 14:45:53,850 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 73 [2020-10-28 14:45:54,742 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 92 [2020-10-28 14:45:55,552 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 111 [2020-10-28 14:45:56,580 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 124 [2020-10-28 14:45:57,136 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 80 [2020-10-28 14:45:57,657 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 73 [2020-10-28 14:45:57,909 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2020-10-28 14:45:58,135 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2020-10-28 14:45:58,316 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2020-10-28 14:45:58,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:58,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:58,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:58,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:58,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:58,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:58,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:58,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:58,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:58,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:58,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:58,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:58,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118917874] [2020-10-28 14:45:58,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:58,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:45:58,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926852868] [2020-10-28 14:45:58,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:45:58,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:58,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:45:58,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:45:58,865 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand 22 states. [2020-10-28 14:45:59,450 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 60 [2020-10-28 14:46:00,193 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 106 [2020-10-28 14:46:00,955 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 158 [2020-10-28 14:46:01,429 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 105 [2020-10-28 14:46:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:02,327 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2020-10-28 14:46:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:46:02,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-28 14:46:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:02,329 INFO L225 Difference]: With dead ends: 207 [2020-10-28 14:46:02,329 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 14:46:02,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:46:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 14:46:02,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-10-28 14:46:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 14:46:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 201 transitions. [2020-10-28 14:46:02,354 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 201 transitions. Word has length 54 [2020-10-28 14:46:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:02,355 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 201 transitions. [2020-10-28 14:46:02,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:46:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 201 transitions. [2020-10-28 14:46:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:46:02,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:02,356 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:02,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:46:02,356 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1760517087, now seen corresponding path program 21 times [2020-10-28 14:46:02,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:02,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121157878] [2020-10-28 14:46:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:02,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:03,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:03,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:46:03,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:03,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1175 [2020-10-28 14:46:03,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:03,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:46:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:46:03,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:46:03,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:04,154 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-28 14:46:04,421 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-28 14:46:04,678 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-28 14:46:05,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:46:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:05,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:05,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:05,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:46:05,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:05,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:46:05,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:05,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:05,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:46:05,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:46:05,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:46:05,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:46:05,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121157878] [2020-10-28 14:46:05,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:46:05,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:46:05,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788233031] [2020-10-28 14:46:05,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:46:05,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:46:05,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:46:05,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:46:05,212 INFO L87 Difference]: Start difference. First operand 180 states and 201 transitions. Second operand 23 states. [2020-10-28 14:46:06,404 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2020-10-28 14:46:06,657 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-28 14:46:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:07,334 INFO L93 Difference]: Finished difference Result 218 states and 242 transitions. [2020-10-28 14:46:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:46:07,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-28 14:46:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:07,337 INFO L225 Difference]: With dead ends: 218 [2020-10-28 14:46:07,337 INFO L226 Difference]: Without dead ends: 212 [2020-10-28 14:46:07,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:46:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-28 14:46:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2020-10-28 14:46:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-28 14:46:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 223 transitions. [2020-10-28 14:46:07,364 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 223 transitions. Word has length 54 [2020-10-28 14:46:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:07,364 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 223 transitions. [2020-10-28 14:46:07,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:46:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 223 transitions. [2020-10-28 14:46:07,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:46:07,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:07,365 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:07,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:46:07,366 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:07,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1832766416, now seen corresponding path program 4 times [2020-10-28 14:46:07,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:07,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631057884] [2020-10-28 14:46:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:07,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:07,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:07,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:08,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:08,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:11,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:11,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:46:11,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:46:11,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4277 [2020-10-28 14:46:11,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:11,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:11,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:46:11,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:46:11,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:46:11,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:12,062 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-28 14:46:12,525 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-28 14:46:13,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:46:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:13,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:13,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:13,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:46:13,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:13,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:46:13,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:13,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:13,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:46:13,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:46:13,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:46:13,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:46:13,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631057884] [2020-10-28 14:46:13,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:46:13,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:46:13,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625217877] [2020-10-28 14:46:13,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:46:13,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:46:13,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:46:13,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:46:13,355 INFO L87 Difference]: Start difference. First operand 199 states and 223 transitions. Second operand 22 states. [2020-10-28 14:46:14,435 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:46:14,904 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-28 14:46:15,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:15,864 INFO L93 Difference]: Finished difference Result 231 states and 256 transitions. [2020-10-28 14:46:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:46:15,865 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-28 14:46:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:15,866 INFO L225 Difference]: With dead ends: 231 [2020-10-28 14:46:15,867 INFO L226 Difference]: Without dead ends: 208 [2020-10-28 14:46:15,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:46:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-28 14:46:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 194. [2020-10-28 14:46:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-28 14:46:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 213 transitions. [2020-10-28 14:46:15,889 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 213 transitions. Word has length 54 [2020-10-28 14:46:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:15,890 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 213 transitions. [2020-10-28 14:46:15,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:46:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 213 transitions. [2020-10-28 14:46:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:46:15,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:15,891 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:15,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:46:15,891 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1915810335, now seen corresponding path program 5 times [2020-10-28 14:46:15,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:15,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372972000] [2020-10-28 14:46:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:16,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:16,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:16,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:46:16,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:16,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 916 [2020-10-28 14:46:16,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:16,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:46:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:46:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:46:16,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:17,376 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-28 14:46:17,629 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-28 14:46:17,880 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-28 14:46:18,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:46:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:18,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:18,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:18,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:46:18,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:18,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:46:18,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:18,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:18,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:46:18,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:46:18,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:46:18,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:46:18,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372972000] [2020-10-28 14:46:18,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:46:18,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:46:18,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084994080] [2020-10-28 14:46:18,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:46:18,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:46:18,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:46:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:46:18,487 INFO L87 Difference]: Start difference. First operand 194 states and 213 transitions. Second operand 23 states. [2020-10-28 14:46:19,267 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-28 14:46:19,474 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-28 14:46:19,866 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-28 14:46:20,135 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-28 14:46:20,424 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-28 14:46:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:21,090 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2020-10-28 14:46:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:46:21,090 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-28 14:46:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:21,091 INFO L225 Difference]: With dead ends: 204 [2020-10-28 14:46:21,092 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 14:46:21,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:46:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 14:46:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-28 14:46:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-28 14:46:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 215 transitions. [2020-10-28 14:46:21,127 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 215 transitions. Word has length 54 [2020-10-28 14:46:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:21,129 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 215 transitions. [2020-10-28 14:46:21,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:46:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 215 transitions. [2020-10-28 14:46:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:46:21,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:21,130 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:21,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:46:21,131 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:21,131 INFO L82 PathProgramCache]: Analyzing trace with hash -124498276, now seen corresponding path program 22 times [2020-10-28 14:46:21,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:21,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527514219] [2020-10-28 14:46:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:21,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:22,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:22,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:46:22,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:22,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-28 14:46:22,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:22,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:46:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:46:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:46:22,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:22,590 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-28 14:46:22,867 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-28 14:46:23,002 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-28 14:46:23,193 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-28 14:46:24,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:46:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:24,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:24,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:24,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:46:24,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:24,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:46:24,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:24,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:46:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:46:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:46:24,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:46:24,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527514219] [2020-10-28 14:46:24,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:46:24,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:46:24,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855413594] [2020-10-28 14:46:24,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:46:24,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:46:24,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:46:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:46:24,066 INFO L87 Difference]: Start difference. First operand 196 states and 215 transitions. Second operand 24 states. [2020-10-28 14:46:24,728 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-28 14:46:24,936 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-28 14:46:25,348 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 14:46:25,571 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-28 14:46:25,745 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-28 14:46:26,032 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-28 14:46:26,281 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-28 14:46:26,478 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:46:26,908 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2020-10-28 14:46:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:28,102 INFO L93 Difference]: Finished difference Result 300 states and 331 transitions. [2020-10-28 14:46:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:46:28,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-28 14:46:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:28,105 INFO L225 Difference]: With dead ends: 300 [2020-10-28 14:46:28,105 INFO L226 Difference]: Without dead ends: 294 [2020-10-28 14:46:28,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:46:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-28 14:46:28,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 240. [2020-10-28 14:46:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-28 14:46:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 266 transitions. [2020-10-28 14:46:28,129 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 266 transitions. Word has length 56 [2020-10-28 14:46:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:28,129 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 266 transitions. [2020-10-28 14:46:28,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:46:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 266 transitions. [2020-10-28 14:46:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:46:28,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:28,130 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:28,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:46:28,131 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:28,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2049366300, now seen corresponding path program 5 times [2020-10-28 14:46:28,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:28,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396255603] [2020-10-28 14:46:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:28,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:28,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:28,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:46:28,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:28,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 772 [2020-10-28 14:46:28,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:28,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:28,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:46:28,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:46:28,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:46:28,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:29,394 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 14:46:29,525 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-28 14:46:29,740 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-28 14:46:30,061 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-28 14:46:30,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:46:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:30,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:30,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:30,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:46:30,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:30,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:46:30,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:30,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:46:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:46:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:46:30,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:46:30,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396255603] [2020-10-28 14:46:30,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:46:30,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:46:30,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531991419] [2020-10-28 14:46:30,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:46:30,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:46:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:46:30,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:46:30,796 INFO L87 Difference]: Start difference. First operand 240 states and 266 transitions. Second operand 24 states. [2020-10-28 14:46:32,304 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2020-10-28 14:46:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:33,328 INFO L93 Difference]: Finished difference Result 283 states and 313 transitions. [2020-10-28 14:46:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:46:33,329 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-28 14:46:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:33,331 INFO L225 Difference]: With dead ends: 283 [2020-10-28 14:46:33,331 INFO L226 Difference]: Without dead ends: 275 [2020-10-28 14:46:33,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:46:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-28 14:46:33,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 249. [2020-10-28 14:46:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-28 14:46:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 277 transitions. [2020-10-28 14:46:33,358 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 277 transitions. Word has length 56 [2020-10-28 14:46:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:33,359 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 277 transitions. [2020-10-28 14:46:33,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:46:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 277 transitions. [2020-10-28 14:46:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 14:46:33,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:33,360 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:33,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:46:33,360 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash 131548759, now seen corresponding path program 23 times [2020-10-28 14:46:33,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:33,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3196242] [2020-10-28 14:46:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:33,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:34,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:34,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 14:46:34,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:34,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-28 14:46:34,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:34,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:34,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:46:34,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:46:34,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:46:34,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:35,023 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-28 14:46:35,285 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-28 14:46:35,590 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-28 14:46:35,741 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-28 14:46:35,888 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-28 14:46:36,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:46:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:36,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:36,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:36,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:46:36,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:36,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:46:36,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:36,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:36,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:46:36,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:46:36,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:46:36,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:46:36,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3196242] [2020-10-28 14:46:36,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:46:36,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:46:36,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095400059] [2020-10-28 14:46:36,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:46:36,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:46:36,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:46:36,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:46:36,576 INFO L87 Difference]: Start difference. First operand 249 states and 277 transitions. Second operand 25 states. [2020-10-28 14:46:37,720 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-28 14:46:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:39,036 INFO L93 Difference]: Finished difference Result 323 states and 357 transitions. [2020-10-28 14:46:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:46:39,037 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-28 14:46:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:39,038 INFO L225 Difference]: With dead ends: 323 [2020-10-28 14:46:39,038 INFO L226 Difference]: Without dead ends: 317 [2020-10-28 14:46:39,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:46:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-28 14:46:39,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 263. [2020-10-28 14:46:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-28 14:46:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2020-10-28 14:46:39,081 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 292 transitions. Word has length 58 [2020-10-28 14:46:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:39,081 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 292 transitions. [2020-10-28 14:46:39,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:46:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 292 transitions. [2020-10-28 14:46:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:46:39,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:39,083 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:39,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:46:39,083 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:39,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1379613522, now seen corresponding path program 24 times [2020-10-28 14:46:39,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:39,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325913743] [2020-10-28 14:46:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:39,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:40,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:40,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:46:40,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:40,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-28 14:46:40,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:40,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:46:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:46:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:46:40,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:40,482 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-28 14:46:40,743 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-28 14:46:41,001 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-28 14:46:41,334 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-28 14:46:41,492 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-28 14:46:41,654 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-28 14:46:42,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:46:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:42,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:42,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:42,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:46:42,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:42,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:46:42,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:42,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:42,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:46:42,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:46:42,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:46:42,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:46:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325913743] [2020-10-28 14:46:42,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:46:42,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:46:42,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854874402] [2020-10-28 14:46:42,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:46:42,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:46:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:46:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:46:42,425 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand 25 states. [2020-10-28 14:46:43,165 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-28 14:46:43,602 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:46:44,116 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 14:46:44,357 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:46:44,715 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-28 14:46:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:46,171 INFO L93 Difference]: Finished difference Result 325 states and 359 transitions. [2020-10-28 14:46:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:46:46,172 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-28 14:46:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:46,175 INFO L225 Difference]: With dead ends: 325 [2020-10-28 14:46:46,175 INFO L226 Difference]: Without dead ends: 303 [2020-10-28 14:46:46,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:46:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-28 14:46:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 229. [2020-10-28 14:46:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-28 14:46:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 255 transitions. [2020-10-28 14:46:46,202 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 255 transitions. Word has length 60 [2020-10-28 14:46:46,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:46,202 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 255 transitions. [2020-10-28 14:46:46,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:46:46,202 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 255 transitions. [2020-10-28 14:46:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:46:46,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:46,203 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:46,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:46:46,203 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:46,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1343181138, now seen corresponding path program 6 times [2020-10-28 14:46:46,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:46,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318726981] [2020-10-28 14:46:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:46,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:46,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:46,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:47,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:47,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:47,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:51,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:51,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:46:51,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:46:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:46:51,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:51,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:46:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:46:51,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:46:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:52,937 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 50 [2020-10-28 14:46:53,569 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 60 [2020-10-28 14:46:54,264 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 85 [2020-10-28 14:46:55,270 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 90 [2020-10-28 14:46:56,342 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 68 [2020-10-28 14:46:57,650 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 307 DAG size of output: 93 [2020-10-28 14:46:59,083 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 320 DAG size of output: 107 [2020-10-28 14:47:00,344 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 341 DAG size of output: 123 [2020-10-28 14:47:01,323 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 135 [2020-10-28 14:47:01,891 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 80 [2020-10-28 14:47:02,167 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 68 [2020-10-28 14:47:02,355 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 50 [2020-10-28 14:47:02,544 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2020-10-28 14:47:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:47:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:03,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:03,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:03,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:47:03,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:03,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:47:03,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:03,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:47:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:47:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:47:03,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:47:03,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318726981] [2020-10-28 14:47:03,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:47:03,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:47:03,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955209087] [2020-10-28 14:47:03,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:47:03,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:47:03,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:47:03,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:47:03,283 INFO L87 Difference]: Start difference. First operand 229 states and 255 transitions. Second operand 25 states. [2020-10-28 14:47:03,877 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 52 [2020-10-28 14:47:04,327 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2020-10-28 14:47:04,779 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 94 [2020-10-28 14:47:05,794 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 156 [2020-10-28 14:47:06,385 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 128 [2020-10-28 14:47:06,664 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-28 14:47:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:47:07,391 INFO L93 Difference]: Finished difference Result 258 states and 285 transitions. [2020-10-28 14:47:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:47:07,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-28 14:47:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:47:07,394 INFO L225 Difference]: With dead ends: 258 [2020-10-28 14:47:07,394 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 14:47:07,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:47:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 14:47:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2020-10-28 14:47:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-28 14:47:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 254 transitions. [2020-10-28 14:47:07,417 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 254 transitions. Word has length 60 [2020-10-28 14:47:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:47:07,417 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 254 transitions. [2020-10-28 14:47:07,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:47:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 254 transitions. [2020-10-28 14:47:07,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:47:07,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:47:07,418 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:47:07,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:47:07,418 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:47:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:47:07,419 INFO L82 PathProgramCache]: Analyzing trace with hash -513817149, now seen corresponding path program 25 times [2020-10-28 14:47:07,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:47:07,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316751460] [2020-10-28 14:47:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:47:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:07,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:08,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:08,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:47:08,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:08,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1305 [2020-10-28 14:47:08,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:08,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:08,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:47:08,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:47:08,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:47:08,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:09,289 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-28 14:47:09,473 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-28 14:47:09,731 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-28 14:47:10,037 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-28 14:47:10,372 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-28 14:47:11,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:47:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:11,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:11,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:11,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:47:11,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:11,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:47:11,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:11,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:47:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:47:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:47:11,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:47:11,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316751460] [2020-10-28 14:47:11,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:47:11,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:47:11,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985997877] [2020-10-28 14:47:11,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:47:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:47:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:47:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:47:11,245 INFO L87 Difference]: Start difference. First operand 229 states and 254 transitions. Second operand 26 states. [2020-10-28 14:47:12,220 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-28 14:47:12,471 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-28 14:47:12,947 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:47:13,209 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 14:47:13,410 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:47:13,824 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-28 14:47:14,212 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2020-10-28 14:47:14,539 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2020-10-28 14:47:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:47:15,556 INFO L93 Difference]: Finished difference Result 271 states and 299 transitions. [2020-10-28 14:47:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:47:15,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-28 14:47:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:47:15,559 INFO L225 Difference]: With dead ends: 271 [2020-10-28 14:47:15,559 INFO L226 Difference]: Without dead ends: 265 [2020-10-28 14:47:15,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:47:15,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-28 14:47:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 250. [2020-10-28 14:47:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-28 14:47:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2020-10-28 14:47:15,587 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 60 [2020-10-28 14:47:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:47:15,588 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2020-10-28 14:47:15,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:47:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2020-10-28 14:47:15,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:47:15,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:47:15,589 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:47:15,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:47:15,589 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:47:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:47:15,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1713281006, now seen corresponding path program 6 times [2020-10-28 14:47:15,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:47:15,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572434912] [2020-10-28 14:47:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:47:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:15,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:15,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:16,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:16,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:17,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:20,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:20,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:47:20,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:47:20,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 14:47:20,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:20,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:47:20,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:47:20,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:47:20,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:21,226 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 14:47:21,488 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-28 14:47:21,672 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-28 14:47:21,840 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-28 14:47:22,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:47:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:22,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:22,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:22,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:47:22,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:22,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:47:22,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:22,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:47:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:47:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:47:22,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:47:22,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572434912] [2020-10-28 14:47:22,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:47:22,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:47:22,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76865466] [2020-10-28 14:47:22,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:47:22,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:47:22,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:47:22,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:47:22,604 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand 25 states. [2020-10-28 14:47:23,159 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 14:47:23,627 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:47:24,136 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 14:47:24,396 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-28 14:47:24,769 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-28 14:47:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:47:25,903 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2020-10-28 14:47:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:47:25,903 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-28 14:47:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:47:25,905 INFO L225 Difference]: With dead ends: 286 [2020-10-28 14:47:25,906 INFO L226 Difference]: Without dead ends: 261 [2020-10-28 14:47:25,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:47:25,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-28 14:47:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 245. [2020-10-28 14:47:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-28 14:47:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 267 transitions. [2020-10-28 14:47:25,938 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 267 transitions. Word has length 60 [2020-10-28 14:47:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:47:25,938 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 267 transitions. [2020-10-28 14:47:25,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:47:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 267 transitions. [2020-10-28 14:47:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:47:25,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:47:25,940 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:47:25,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:47:25,940 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:47:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:47:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1291186109, now seen corresponding path program 7 times [2020-10-28 14:47:25,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:47:25,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229106616] [2020-10-28 14:47:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:47:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:26,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:27,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:27,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:47:27,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:27,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1217 [2020-10-28 14:47:27,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:27,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:27,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:47:27,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:47:27,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:47:27,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:27,799 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 14:47:28,068 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-28 14:47:28,373 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-28 14:47:28,707 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-28 14:47:29,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:47:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:29,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:29,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:29,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:47:29,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:29,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:47:29,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:29,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:29,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:47:29,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:47:29,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:47:29,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:47:29,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229106616] [2020-10-28 14:47:29,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:47:29,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:47:29,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37498850] [2020-10-28 14:47:29,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:47:29,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:47:29,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:47:29,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:47:29,557 INFO L87 Difference]: Start difference. First operand 245 states and 267 transitions. Second operand 26 states. [2020-10-28 14:47:30,882 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-28 14:47:31,171 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-28 14:47:31,356 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:47:31,721 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-28 14:47:32,083 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 96 [2020-10-28 14:47:32,470 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2020-10-28 14:47:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:47:33,362 INFO L93 Difference]: Finished difference Result 255 states and 278 transitions. [2020-10-28 14:47:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:47:33,363 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-28 14:47:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:47:33,365 INFO L225 Difference]: With dead ends: 255 [2020-10-28 14:47:33,365 INFO L226 Difference]: Without dead ends: 247 [2020-10-28 14:47:33,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:47:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-28 14:47:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2020-10-28 14:47:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 14:47:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 269 transitions. [2020-10-28 14:47:33,397 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 269 transitions. Word has length 60 [2020-10-28 14:47:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:47:33,397 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 269 transitions. [2020-10-28 14:47:33,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:47:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 269 transitions. [2020-10-28 14:47:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:47:33,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:47:33,398 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:47:33,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:47:33,399 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:47:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:47:33,399 INFO L82 PathProgramCache]: Analyzing trace with hash -341733442, now seen corresponding path program 26 times [2020-10-28 14:47:33,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:47:33,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403039155] [2020-10-28 14:47:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:47:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:34,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:34,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:47:34,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:34,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1278 [2020-10-28 14:47:34,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:34,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:47:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:47:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 14:47:34,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:35,288 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-28 14:47:35,613 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-28 14:47:35,944 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-28 14:47:36,096 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-28 14:47:36,349 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-28 14:47:36,536 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-28 14:47:36,766 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-28 14:47:37,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:47:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:37,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:37,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:37,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:47:37,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:37,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:47:37,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:37,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:47:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:47:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:47:37,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:47:37,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403039155] [2020-10-28 14:47:37,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:47:37,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:47:37,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094663724] [2020-10-28 14:47:37,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:47:37,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:47:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:47:37,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:47:37,618 INFO L87 Difference]: Start difference. First operand 247 states and 269 transitions. Second operand 27 states. [2020-10-28 14:47:38,346 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 14:47:38,552 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-28 14:47:38,969 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:47:39,202 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:47:39,681 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 14:47:39,958 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-28 14:47:40,156 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:47:40,495 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-28 14:47:40,798 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-28 14:47:41,019 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-28 14:47:41,529 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2020-10-28 14:47:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:47:43,077 INFO L93 Difference]: Finished difference Result 374 states and 410 transitions. [2020-10-28 14:47:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:47:43,078 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-28 14:47:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:47:43,080 INFO L225 Difference]: With dead ends: 374 [2020-10-28 14:47:43,080 INFO L226 Difference]: Without dead ends: 368 [2020-10-28 14:47:43,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=204, Invalid=2448, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 14:47:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-28 14:47:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 298. [2020-10-28 14:47:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-28 14:47:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 328 transitions. [2020-10-28 14:47:43,112 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 328 transitions. Word has length 62 [2020-10-28 14:47:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:47:43,112 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 328 transitions. [2020-10-28 14:47:43,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:47:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 328 transitions. [2020-10-28 14:47:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:47:43,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:47:43,113 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:47:43,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:47:43,113 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:47:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:47:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1217389826, now seen corresponding path program 6 times [2020-10-28 14:47:43,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:47:43,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944802485] [2020-10-28 14:47:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:47:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:43,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:44,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:44,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:47:44,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1245 [2020-10-28 14:47:44,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:44,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:47:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:47:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:47:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:44,999 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-28 14:47:45,355 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-28 14:47:45,624 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-28 14:47:45,955 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2020-10-28 14:47:46,154 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-28 14:47:46,380 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-28 14:47:47,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:47:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:47,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:47:47,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:47:47,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:47:47,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944802485] [2020-10-28 14:47:47,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:47:47,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:47:47,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891638563] [2020-10-28 14:47:47,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:47:47,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:47:47,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:47:47,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:47:47,192 INFO L87 Difference]: Start difference. First operand 298 states and 328 transitions. Second operand 27 states. [2020-10-28 14:47:49,266 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 102 [2020-10-28 14:47:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:47:50,578 INFO L93 Difference]: Finished difference Result 345 states and 379 transitions. [2020-10-28 14:47:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:47:50,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-28 14:47:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:47:50,581 INFO L225 Difference]: With dead ends: 345 [2020-10-28 14:47:50,581 INFO L226 Difference]: Without dead ends: 337 [2020-10-28 14:47:50,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:47:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-28 14:47:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 307. [2020-10-28 14:47:50,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-28 14:47:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 339 transitions. [2020-10-28 14:47:50,622 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 339 transitions. Word has length 62 [2020-10-28 14:47:50,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:47:50,623 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 339 transitions. [2020-10-28 14:47:50,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:47:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 339 transitions. [2020-10-28 14:47:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 14:47:50,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:47:50,624 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:47:50,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:47:50,624 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:47:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:47:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1821951737, now seen corresponding path program 27 times [2020-10-28 14:47:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:47:50,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407700592] [2020-10-28 14:47:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:47:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:50,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:51,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:51,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:47:51,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:51,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1248 [2020-10-28 14:47:51,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:51,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:47:51,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:47:51,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:47:51,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:52,725 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-28 14:47:52,864 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-28 14:47:53,081 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-28 14:47:53,235 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-28 14:47:53,483 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-28 14:47:53,678 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-28 14:47:53,887 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-10-28 14:47:54,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:47:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:54,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:54,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:54,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:47:54,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:54,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:47:54,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:54,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:54,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:47:54,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:47:54,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:47:54,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:47:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:47:54,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407700592] [2020-10-28 14:47:54,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:47:54,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:47:54,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414413847] [2020-10-28 14:47:54,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:47:54,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:47:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:47:54,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:47:54,914 INFO L87 Difference]: Start difference. First operand 307 states and 339 transitions. Second operand 28 states. [2020-10-28 14:47:55,562 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 14:47:56,042 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:47:56,293 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 14:47:56,610 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 14:47:56,886 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66