/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/forester-heap/sll-rb-cnstr_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:31:17,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:31:17,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:31:17,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:31:17,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:31:17,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:31:17,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:31:17,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:31:17,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:31:17,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:31:17,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:31:17,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:31:17,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:31:17,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:31:17,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:31:17,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:31:17,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:31:17,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:31:17,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:31:17,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:31:17,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:31:17,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:31:17,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:31:17,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:31:17,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:31:17,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:31:17,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:31:17,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:31:17,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:31:17,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:31:17,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:31:17,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:31:17,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:31:17,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:31:17,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:31:17,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:31:17,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:31:17,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:31:17,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:31:17,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:31:17,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:31:17,305 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 14:31:17,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:31:17,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:31:17,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:31:17,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:31:17,355 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:31:17,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:31:17,356 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:31:17,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:31:17,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:31:17,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:31:17,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:31:17,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:31:17,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:31:17,358 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:31:17,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:31:17,358 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:31:17,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:31:17,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:31:17,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:31:17,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:31:17,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:31:17,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:31:17,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:31:17,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:31:17,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:31:17,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:31:17,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:31:17,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:31:17,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:31:17,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:31:17,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:31:17,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:31:17,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:31:17,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:31:17,857 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:31:17,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-1.i [2020-10-28 14:31:17,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93d25d0a9/88ade5da0d93469e985b496198afa384/FLAG2b2d73998 [2020-10-28 14:31:18,677 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:31:18,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-1.i [2020-10-28 14:31:18,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93d25d0a9/88ade5da0d93469e985b496198afa384/FLAG2b2d73998 [2020-10-28 14:31:18,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93d25d0a9/88ade5da0d93469e985b496198afa384 [2020-10-28 14:31:18,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:31:18,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:31:18,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:31:18,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:31:18,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:31:18,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:31:18" (1/1) ... [2020-10-28 14:31:18,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ee3921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:18, skipping insertion in model container [2020-10-28 14:31:18,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:31:18" (1/1) ... [2020-10-28 14:31:18,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:31:18,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:31:19,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:31:19,360 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:31:19,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:31:19,459 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:31:19,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19 WrapperNode [2020-10-28 14:31:19,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:31:19,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:31:19,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:31:19,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:31:19,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19" (1/1) ... [2020-10-28 14:31:19,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19" (1/1) ... [2020-10-28 14:31:19,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19" (1/1) ... [2020-10-28 14:31:19,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19" (1/1) ... [2020-10-28 14:31:19,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19" (1/1) ... [2020-10-28 14:31:19,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19" (1/1) ... [2020-10-28 14:31:19,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19" (1/1) ... [2020-10-28 14:31:19,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:31:19,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:31:19,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:31:19,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:31:19,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19" (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 14:31:19,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:31:19,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:31:19,657 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:31:19,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:31:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:31:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:31:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:31:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:31:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:31:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:31:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:31:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:31:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:31:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:31:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:31:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:31:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:31:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:31:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:31:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:31:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:31:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:31:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:31:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:31:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:31:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:31:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:31:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:31:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:31:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:31:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:31:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:31:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:31:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:31:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:31:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:31:19,683 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:31:19,683 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:31:19,683 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:31:19,683 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:31:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:31:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:31:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:31:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:31:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:31:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:31:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:31:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:31:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:31:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:31:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:31:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:31:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:31:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:31:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:31:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:31:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:31:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:31:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:31:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:31:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:31:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:31:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:31:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:31:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:31:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:31:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:31:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:31:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:31:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:31:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:31:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:31:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:31:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:31:19,694 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:31:19,694 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:31:19,694 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:31:19,694 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:31:19,694 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:31:19,694 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:31:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:31:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:31:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:31:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:31:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:31:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:31:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:31:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:31:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:31:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:31:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:31:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:31:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:31:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:31:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:31:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:31:19,697 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:31:19,697 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:31:19,697 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:31:19,697 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:31:19,697 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:31:19,697 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:31:19,697 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:31:19,698 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:31:19,698 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:31:19,698 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:31:19,698 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:31:19,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:31:19,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:31:19,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:31:19,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:31:19,699 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:31:19,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:31:19,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:31:19,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:31:19,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:31:19,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:31:19,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:31:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:31:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:31:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:31:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:31:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:31:20,281 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:31:20,281 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-28 14:31:20,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:31:20 BoogieIcfgContainer [2020-10-28 14:31:20,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:31:20,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:31:20,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:31:20,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:31:20,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:31:18" (1/3) ... [2020-10-28 14:31:20,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f08987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:31:20, skipping insertion in model container [2020-10-28 14:31:20,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:31:19" (2/3) ... [2020-10-28 14:31:20,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f08987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:31:20, skipping insertion in model container [2020-10-28 14:31:20,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:31:20" (3/3) ... [2020-10-28 14:31:20,292 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-1.i [2020-10-28 14:31:20,305 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:31:20,312 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:31:20,327 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:31:20,354 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:31:20,354 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:31:20,354 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:31:20,354 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:31:20,355 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:31:20,355 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:31:20,355 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:31:20,355 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:31:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-28 14:31:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:31:20,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:20,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:20,382 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:20,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:20,389 INFO L82 PathProgramCache]: Analyzing trace with hash -630579744, now seen corresponding path program 1 times [2020-10-28 14:31:20,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:20,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818999332] [2020-10-28 14:31:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:20,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:20,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:20,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:20,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:31:20,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:20,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 14:31:20,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:20,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:31:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 14:31:20,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:20,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:20,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:20,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:20,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 14:31:20,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:20,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:21,017 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 14:31:21,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818999332] [2020-10-28 14:31:21,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:21,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:31:21,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662035003] [2020-10-28 14:31:21,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:31:21,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:21,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:31:21,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:31:21,055 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-10-28 14:31:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:21,268 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2020-10-28 14:31:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:31:21,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:31:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:21,280 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:31:21,280 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 14:31:21,284 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 14:31:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 14:31:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 14:31:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:31:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-28 14:31:21,326 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2020-10-28 14:31:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:21,326 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-28 14:31:21,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:31:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-28 14:31:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:31:21,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:21,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:21,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:31:21,328 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:21,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1372892906, now seen corresponding path program 1 times [2020-10-28 14:31:21,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:21,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241655585] [2020-10-28 14:31:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:21,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:21,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:31:21,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:21,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-28 14:31:21,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:21,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:21,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:31:21,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:21,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:31:21,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:21,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:21,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:21,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:21,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:31:21,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:21,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:21,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:21,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:21,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:21,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:21,535 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 14:31:21,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241655585] [2020-10-28 14:31:21,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:21,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:31:21,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390533599] [2020-10-28 14:31:21,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:31:21,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:31:21,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:31:21,539 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2020-10-28 14:31:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:21,652 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-28 14:31:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:31:21,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:31:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:21,654 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:31:21,654 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:31:21,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:31:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:31:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-28 14:31:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:31:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-28 14:31:21,663 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 13 [2020-10-28 14:31:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:21,664 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-28 14:31:21,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:31:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-28 14:31:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:31:21,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:21,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:21,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:31:21,665 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:21,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1882684930, now seen corresponding path program 1 times [2020-10-28 14:31:21,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:21,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226272355] [2020-10-28 14:31:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:21,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:21,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:31:21,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:21,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 14:31:21,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:21,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:21,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:31:21,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:21,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:31:21,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:21,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:21,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:21,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:21,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:21,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:31:21,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:21,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:21,868 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 14:31:21,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226272355] [2020-10-28 14:31:21,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:21,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:31:21,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296297989] [2020-10-28 14:31:21,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:31:21,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:21,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:31:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:31:21,871 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-28 14:31:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:22,028 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-28 14:31:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:31:22,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 14:31:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:22,030 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:31:22,030 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:31:22,031 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 14:31:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:31:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-10-28 14:31:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:31:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 14:31:22,040 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2020-10-28 14:31:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:22,041 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 14:31:22,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:31:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 14:31:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:31:22,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:22,042 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:22,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:31:22,042 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:22,043 INFO L82 PathProgramCache]: Analyzing trace with hash -922245935, now seen corresponding path program 1 times [2020-10-28 14:31:22,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:22,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761208637] [2020-10-28 14:31:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:22,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:22,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:31:22,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:22,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-28 14:31:22,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:22,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:22,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:31:22,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:22,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:31:22,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:22,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:22,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:22,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:22,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:22,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:22,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:22,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:22,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:22,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:22,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:22,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:22,565 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 14:31:22,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761208637] [2020-10-28 14:31:22,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:22,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:31:22,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028165419] [2020-10-28 14:31:22,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:31:22,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:22,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:31:22,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:22,568 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 8 states. [2020-10-28 14:31:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:22,833 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-28 14:31:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:31:22,834 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-28 14:31:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:22,835 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:31:22,835 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 14:31:22,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 14:31:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2020-10-28 14:31:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:31:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-28 14:31:22,845 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 19 [2020-10-28 14:31:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:22,845 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-28 14:31:22,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:31:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-28 14:31:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:31:22,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:22,847 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:22,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:31:22,847 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:22,848 INFO L82 PathProgramCache]: Analyzing trace with hash -221181357, now seen corresponding path program 1 times [2020-10-28 14:31:22,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:22,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944076824] [2020-10-28 14:31:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:22,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:23,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:31:23,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:23,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-28 14:31:23,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:23,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:31:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:31:23,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:23,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:23,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:23,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:23,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:23,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:23,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:23,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:23,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:23,265 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 14:31:23,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944076824] [2020-10-28 14:31:23,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:23,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:31:23,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95157760] [2020-10-28 14:31:23,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:31:23,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:31:23,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:23,268 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2020-10-28 14:31:23,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:23,553 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-10-28 14:31:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:23,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-28 14:31:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:23,555 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:31:23,555 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 14:31:23,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 14:31:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2020-10-28 14:31:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:31:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-28 14:31:23,564 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 19 [2020-10-28 14:31:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:23,564 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-28 14:31:23,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:31:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-28 14:31:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:31:23,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:23,565 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] [2020-10-28 14:31:23,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:31:23,566 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:23,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1654214030, now seen corresponding path program 1 times [2020-10-28 14:31:23,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:23,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400843108] [2020-10-28 14:31:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:23,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:23,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:31:23,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:23,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-28 14:31:23,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:23,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:31:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:23,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:31:23,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:23,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:23,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:23,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:23,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:23,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:23,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:23,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:23,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:23,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:23,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:23,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:23,857 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 14:31:23,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400843108] [2020-10-28 14:31:23,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:23,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:31:23,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504835714] [2020-10-28 14:31:23,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:31:23,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:23,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:31:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:31:23,860 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 6 states. [2020-10-28 14:31:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:24,028 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2020-10-28 14:31:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:31:24,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 14:31:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:24,031 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:31:24,031 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 14:31:24,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 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 14:31:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 14:31:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-10-28 14:31:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:31:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-28 14:31:24,040 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2020-10-28 14:31:24,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:24,041 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-28 14:31:24,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:31:24,041 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-28 14:31:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:31:24,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:24,042 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:24,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:31:24,042 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash 967130404, now seen corresponding path program 1 times [2020-10-28 14:31:24,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:24,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156602912] [2020-10-28 14:31:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:24,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:24,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:24,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:31:24,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:24,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-28 14:31:24,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:24,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:31:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:31:24,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:24,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:24,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:24,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:24,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:24,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:24,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:24,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:24,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:24,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:24,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:24,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:24,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:24,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156602912] [2020-10-28 14:31:24,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:24,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:24,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267924744] [2020-10-28 14:31:24,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:24,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:24,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:24,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:24,567 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 9 states. [2020-10-28 14:31:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:24,840 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-28 14:31:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:31:24,840 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:31:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:24,841 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:31:24,841 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:31:24,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:31:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-28 14:31:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:31:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 14:31:24,853 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 22 [2020-10-28 14:31:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:24,854 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 14:31:24,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 14:31:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:31:24,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:24,857 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] [2020-10-28 14:31:24,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:31:24,857 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash 128959175, now seen corresponding path program 1 times [2020-10-28 14:31:24,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:24,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792891064] [2020-10-28 14:31:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:24,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:24,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:24,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:31:24,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:24,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 14:31:24,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:24,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:24,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:31:24,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:24,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:31:24,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:25,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:25,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:25,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:25,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:25,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:25,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:25,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:25,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:25,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:25,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:25,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792891064] [2020-10-28 14:31:25,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:25,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:31:25,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734312965] [2020-10-28 14:31:25,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:31:25,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:25,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:31:25,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:31:25,055 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2020-10-28 14:31:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:25,227 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-28 14:31:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:31:25,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 14:31:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:25,229 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:31:25,229 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:31:25,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:31:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 14:31:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:31:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-28 14:31:25,242 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 23 [2020-10-28 14:31:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:25,243 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-28 14:31:25,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:31:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-28 14:31:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:31:25,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:25,247 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] [2020-10-28 14:31:25,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:31:25,247 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:25,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:25,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1442690721, now seen corresponding path program 1 times [2020-10-28 14:31:25,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:25,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833034553] [2020-10-28 14:31:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:25,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:25,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:25,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:25,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:31:25,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:25,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-28 14:31:25,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:25,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:25,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:31:25,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:25,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:31:25,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:25,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:25,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:26,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:26,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:26,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:26,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:26,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:26,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:26,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:26,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:26,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:26,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:26,011 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 14:31:26,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833034553] [2020-10-28 14:31:26,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:26,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:31:26,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262255848] [2020-10-28 14:31:26,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:31:26,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:26,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:31:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:26,019 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-28 14:31:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:26,296 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-28 14:31:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:31:26,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 14:31:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:26,298 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:31:26,298 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:31:26,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:26,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:31:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-28 14:31:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:31:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-28 14:31:26,305 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 23 [2020-10-28 14:31:26,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:26,305 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-28 14:31:26,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:31:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-28 14:31:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:31:26,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:26,306 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:26,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:31:26,307 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:26,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:26,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1868815080, now seen corresponding path program 1 times [2020-10-28 14:31:26,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:26,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338417668] [2020-10-28 14:31:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:26,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:26,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:26,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:31:26,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:26,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-28 14:31:26,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:26,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:31:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:31:26,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:26,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:26,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:26,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:26,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:26,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:26,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:26,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:26,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:26,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:26,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:26,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:26,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:26,700 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 14:31:26,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338417668] [2020-10-28 14:31:26,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:26,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:26,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359568009] [2020-10-28 14:31:26,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:26,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:26,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:26,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:26,703 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 9 states. [2020-10-28 14:31:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:27,029 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-28 14:31:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:27,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 14:31:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:27,031 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:31:27,031 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 14:31:27,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 14:31:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-28 14:31:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:31:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-28 14:31:27,039 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 26 [2020-10-28 14:31:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:27,039 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-28 14:31:27,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-28 14:31:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:31:27,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:27,040 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] [2020-10-28 14:31:27,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:31:27,041 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:27,041 INFO L82 PathProgramCache]: Analyzing trace with hash 432007510, now seen corresponding path program 1 times [2020-10-28 14:31:27,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:27,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66267313] [2020-10-28 14:31:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:27,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:27,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:27,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:31:27,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:27,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-28 14:31:27,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:27,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:31:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:31:27,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:27,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:27,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:27,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:27,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:27,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:27,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:27,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:27,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:27,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:27,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:27,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:27,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:27,417 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 14:31:27,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66267313] [2020-10-28 14:31:27,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:27,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:27,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167625954] [2020-10-28 14:31:27,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:27,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:27,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:27,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:27,419 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 9 states. [2020-10-28 14:31:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:27,912 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-28 14:31:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:27,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 14:31:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:27,915 INFO L225 Difference]: With dead ends: 92 [2020-10-28 14:31:27,915 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 14:31:27,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 14:31:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2020-10-28 14:31:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:31:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-28 14:31:27,929 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 26 [2020-10-28 14:31:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:27,931 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-28 14:31:27,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-28 14:31:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:31:27,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:27,934 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 14:31:27,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:31:27,934 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:27,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1718954766, now seen corresponding path program 1 times [2020-10-28 14:31:27,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:27,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891805038] [2020-10-28 14:31:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:27,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:28,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:28,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:28,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:31:28,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:28,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-28 14:31:28,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:28,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:31:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:31:28,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:31:28,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:28,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:28,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:28,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:28,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:28,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:28,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:28,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:28,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:28,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:28,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:28,582 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 14:31:28,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891805038] [2020-10-28 14:31:28,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:28,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:31:28,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015088821] [2020-10-28 14:31:28,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:31:28,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:28,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:31:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:28,584 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 8 states. [2020-10-28 14:31:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:28,866 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-28 14:31:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:31:28,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-28 14:31:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:28,870 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:31:28,870 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 14:31:28,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 14:31:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-28 14:31:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:31:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-28 14:31:28,879 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 26 [2020-10-28 14:31:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:28,879 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-28 14:31:28,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:31:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-28 14:31:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:31:28,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:28,881 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:28,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:31:28,881 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:28,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1684555517, now seen corresponding path program 2 times [2020-10-28 14:31:28,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:28,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048122830] [2020-10-28 14:31:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:28,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:29,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:29,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:31:29,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:29,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 14:31:29,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:29,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:29,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:31:29,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:29,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:31:29,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:29,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:29,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:29,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:29,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:29,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:29,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:29,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:29,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:29,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:29,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:29,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:29,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048122830] [2020-10-28 14:31:29,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:29,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:29,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697521284] [2020-10-28 14:31:29,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:29,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:29,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:29,220 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 9 states. [2020-10-28 14:31:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:29,507 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-10-28 14:31:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:31:29,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-28 14:31:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:29,509 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:31:29,509 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:31:29,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:31:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 14:31:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:31:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-28 14:31:29,523 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 29 [2020-10-28 14:31:29,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:29,523 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-28 14:31:29,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-28 14:31:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:31:29,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:29,525 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:29,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:31:29,526 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2095142183, now seen corresponding path program 3 times [2020-10-28 14:31:29,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:29,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235775679] [2020-10-28 14:31:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:29,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:29,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:30,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:30,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:31:30,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:30,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-28 14:31:30,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:30,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:30,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:31:30,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:30,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:31:30,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:30,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:30,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:30,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:30,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:30,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:30,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:30,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:30,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:30,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:30,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235775679] [2020-10-28 14:31:30,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:30,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:30,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471544664] [2020-10-28 14:31:30,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:30,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:30,377 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 10 states. [2020-10-28 14:31:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:30,790 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2020-10-28 14:31:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:30,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:31:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:30,792 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:31:30,792 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:31:30,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:31:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 50. [2020-10-28 14:31:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:31:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-28 14:31:30,812 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 29 [2020-10-28 14:31:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:30,812 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-28 14:31:30,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-28 14:31:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:31:30,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:30,813 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] [2020-10-28 14:31:30,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:31:30,814 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:30,816 INFO L82 PathProgramCache]: Analyzing trace with hash 100997477, now seen corresponding path program 1 times [2020-10-28 14:31:30,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:30,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202048198] [2020-10-28 14:31:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:30,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:31,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:31,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:31,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:31:31,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:31,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-28 14:31:31,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:31,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:31:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:31:31,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:31,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:31,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:31,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:31,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:31,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:31,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:31,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:31,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:31,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:31,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202048198] [2020-10-28 14:31:31,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:31,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:31,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141381915] [2020-10-28 14:31:31,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:31,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:31,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:31,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:31,850 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 10 states. [2020-10-28 14:31:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:32,266 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-10-28 14:31:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:31:32,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:31:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:32,267 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:31:32,267 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 14:31:32,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 14:31:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2020-10-28 14:31:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:31:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-28 14:31:32,279 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 29 [2020-10-28 14:31:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:32,279 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-28 14:31:32,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-28 14:31:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:31:32,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:32,280 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:32,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:31:32,281 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:32,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2107257343, now seen corresponding path program 2 times [2020-10-28 14:31:32,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:32,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473597102] [2020-10-28 14:31:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:32,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:32,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:32,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:32,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:31:32,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:32,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-28 14:31:32,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:32,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:32,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:31:32,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:32,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:31:32,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:33,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:33,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:33,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:33,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:33,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:33,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:33,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:33,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:33,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:33,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:33,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:33,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:33,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473597102] [2020-10-28 14:31:33,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:33,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:33,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904988015] [2020-10-28 14:31:33,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:33,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:33,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:33,114 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2020-10-28 14:31:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:33,646 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-10-28 14:31:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:31:33,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:31:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:33,650 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:31:33,650 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:31:33,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:31:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2020-10-28 14:31:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:31:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-28 14:31:33,661 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 29 [2020-10-28 14:31:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:33,661 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-28 14:31:33,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-28 14:31:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:31:33,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:33,662 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] [2020-10-28 14:31:33,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:31:33,663 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash -43704933, now seen corresponding path program 1 times [2020-10-28 14:31:33,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:33,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718176513] [2020-10-28 14:31:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:33,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:33,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:33,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:31:33,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:33,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 14:31:33,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:33,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:33,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:31:33,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:33,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:31:33,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:34,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:34,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:34,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:34,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:34,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:34,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:34,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:34,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:34,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:34,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:34,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:34,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:34,080 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 14:31:34,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718176513] [2020-10-28 14:31:34,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:34,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:34,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546932577] [2020-10-28 14:31:34,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:34,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:34,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:34,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:34,085 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 10 states. [2020-10-28 14:31:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:34,516 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-28 14:31:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:34,517 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:31:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:34,517 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:31:34,518 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 14:31:34,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:34,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 14:31:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2020-10-28 14:31:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:31:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-28 14:31:34,530 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2020-10-28 14:31:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:34,531 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-28 14:31:34,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-28 14:31:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:34,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:34,531 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] [2020-10-28 14:31:34,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:31:34,532 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:34,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1809574030, now seen corresponding path program 4 times [2020-10-28 14:31:34,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:34,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860095864] [2020-10-28 14:31:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:34,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:34,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:34,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:34,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-28 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:35,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:35,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:35,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:35,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:35,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:35,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:35,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:35,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:35,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:35,194 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 14:31:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860095864] [2020-10-28 14:31:35,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:35,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:35,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343006413] [2020-10-28 14:31:35,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:35,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:35,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:35,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:35,196 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 11 states. [2020-10-28 14:31:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:35,776 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-10-28 14:31:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:31:35,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 14:31:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:35,778 INFO L225 Difference]: With dead ends: 106 [2020-10-28 14:31:35,778 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 14:31:35,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:31:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 14:31:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-28 14:31:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:31:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-28 14:31:35,802 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 32 [2020-10-28 14:31:35,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:35,802 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-28 14:31:35,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-28 14:31:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:35,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:35,803 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, 1, 1] [2020-10-28 14:31:35,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:31:35,803 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash -341388246, now seen corresponding path program 1 times [2020-10-28 14:31:35,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:35,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342336508] [2020-10-28 14:31:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:35,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:35,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:36,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:36,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:36,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:36,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-28 14:31:36,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:36,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:36,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:36,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:36,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:31:36,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:36,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:36,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:36,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:36,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:36,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:36,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:31:36,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:36,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:36,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:36,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:36,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342336508] [2020-10-28 14:31:36,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:36,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:36,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675000477] [2020-10-28 14:31:36,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:36,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:36,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:36,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:36,484 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 11 states. [2020-10-28 14:31:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:37,045 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-10-28 14:31:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:31:37,045 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 14:31:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:37,047 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:31:37,047 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:31:37,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:31:37,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:31:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2020-10-28 14:31:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:31:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-28 14:31:37,056 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 32 [2020-10-28 14:31:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:37,056 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-28 14:31:37,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-28 14:31:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:37,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:37,057 INFO L422 BasicCegarLoop]: trace histogram [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 14:31:37,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:31:37,057 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:37,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2062691440, now seen corresponding path program 2 times [2020-10-28 14:31:37,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:37,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706172526] [2020-10-28 14:31:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:37,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:37,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:37,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:37,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-28 14:31:37,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:37,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:31:37,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:37,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:37,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:37,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:37,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:37,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:37,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:37,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:37,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:37,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:37,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:37,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:37,617 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 14:31:37,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706172526] [2020-10-28 14:31:37,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:37,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:37,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690766747] [2020-10-28 14:31:37,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:37,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:37,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:37,621 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 11 states. [2020-10-28 14:31:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:38,385 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-10-28 14:31:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:31:38,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 14:31:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:38,386 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:31:38,386 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 14:31:38,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:31:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 14:31:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2020-10-28 14:31:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:31:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-28 14:31:38,396 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 32 [2020-10-28 14:31:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:38,396 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-28 14:31:38,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-28 14:31:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:38,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:38,397 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, 1, 1] [2020-10-28 14:31:38,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:31:38,398 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:38,398 INFO L82 PathProgramCache]: Analyzing trace with hash 81313580, now seen corresponding path program 1 times [2020-10-28 14:31:38,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:38,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508833698] [2020-10-28 14:31:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:38,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:38,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:38,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:38,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-28 14:31:38,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:38,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:38,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:31:38,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:38,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:31:38,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:39,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:39,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:39,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:39,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:39,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:39,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:39,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:39,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:39,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:39,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:39,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:39,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508833698] [2020-10-28 14:31:39,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:39,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:39,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193402715] [2020-10-28 14:31:39,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:39,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:39,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:39,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:39,088 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 11 states. [2020-10-28 14:31:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:39,852 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2020-10-28 14:31:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:39,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 14:31:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:39,853 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:31:39,853 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 14:31:39,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 14:31:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-28 14:31:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 14:31:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2020-10-28 14:31:39,865 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 32 [2020-10-28 14:31:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:39,865 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2020-10-28 14:31:39,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2020-10-28 14:31:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:39,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:39,866 INFO L422 BasicCegarLoop]: trace histogram [4, 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 14:31:39,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:31:39,866 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:39,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1955052726, now seen corresponding path program 3 times [2020-10-28 14:31:39,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:39,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733725644] [2020-10-28 14:31:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:39,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:40,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:40,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:40,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:40,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-28 14:31:40,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:40,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:40,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:31:40,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:40,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:31:40,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:40,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:40,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:40,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:40,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:40,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:40,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:40,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:40,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:40,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:40,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:40,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:40,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:40,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733725644] [2020-10-28 14:31:40,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:40,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:40,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639461461] [2020-10-28 14:31:40,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:40,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:40,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:40,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:40,552 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 10 states. [2020-10-28 14:31:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:41,028 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-10-28 14:31:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:41,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-28 14:31:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:41,029 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:31:41,029 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 14:31:41,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 14:31:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 14:31:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 14:31:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-28 14:31:41,038 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 32 [2020-10-28 14:31:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:41,039 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-28 14:31:41,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-28 14:31:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:41,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:41,040 INFO L422 BasicCegarLoop]: trace histogram [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 14:31:41,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:31:41,040 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:41,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1675560524, now seen corresponding path program 3 times [2020-10-28 14:31:41,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:41,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626176148] [2020-10-28 14:31:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:41,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:41,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:42,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:42,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:42,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:42,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-28 14:31:42,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:42,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:42,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:42,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:42,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:31:42,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:42,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:42,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:42,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:42,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:42,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:42,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:42,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:42,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:42,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:42,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:42,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:42,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:42,293 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 14:31:42,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626176148] [2020-10-28 14:31:42,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:42,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:42,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113561530] [2020-10-28 14:31:42,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:42,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:42,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:42,295 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 12 states. [2020-10-28 14:31:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:43,095 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2020-10-28 14:31:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:43,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:31:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:43,096 INFO L225 Difference]: With dead ends: 123 [2020-10-28 14:31:43,096 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:31:43,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:31:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:31:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2020-10-28 14:31:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 14:31:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-10-28 14:31:43,106 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 32 [2020-10-28 14:31:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:43,106 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-10-28 14:31:43,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-10-28 14:31:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:43,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:43,107 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, 1, 1] [2020-10-28 14:31:43,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:31:43,107 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:43,108 INFO L82 PathProgramCache]: Analyzing trace with hash -475401752, now seen corresponding path program 2 times [2020-10-28 14:31:43,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:43,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023415568] [2020-10-28 14:31:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:43,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:43,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:43,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:43,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-28 14:31:43,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:43,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:31:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:43,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:43,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:43,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:43,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:43,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:43,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:43,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:43,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:43,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:43,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:43,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:43,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:43,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023415568] [2020-10-28 14:31:43,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:43,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:43,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326174690] [2020-10-28 14:31:43,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:43,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:43,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:43,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:43,725 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 12 states. [2020-10-28 14:31:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:44,506 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-28 14:31:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:44,506 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:31:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:44,508 INFO L225 Difference]: With dead ends: 124 [2020-10-28 14:31:44,508 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 14:31:44,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:31:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 14:31:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2020-10-28 14:31:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:31:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-10-28 14:31:44,521 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 32 [2020-10-28 14:31:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:44,521 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-10-28 14:31:44,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-10-28 14:31:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:44,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:44,522 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] [2020-10-28 14:31:44,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:31:44,522 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2098262350, now seen corresponding path program 4 times [2020-10-28 14:31:44,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:44,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571247678] [2020-10-28 14:31:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:44,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:44,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:44,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:45,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:45,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:45,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:45,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1271 [2020-10-28 14:31:45,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:45,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:45,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:45,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:45,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:31:45,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:46,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:46,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:46,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:46,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:46,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:46,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:46,047 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 14:31:46,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571247678] [2020-10-28 14:31:46,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:46,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:46,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725365154] [2020-10-28 14:31:46,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:46,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:46,049 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 12 states. [2020-10-28 14:31:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:46,906 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2020-10-28 14:31:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:46,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:31:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:46,912 INFO L225 Difference]: With dead ends: 140 [2020-10-28 14:31:46,913 INFO L226 Difference]: Without dead ends: 136 [2020-10-28 14:31:46,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:31:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-28 14:31:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 92. [2020-10-28 14:31:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 14:31:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-28 14:31:46,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 32 [2020-10-28 14:31:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:46,923 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-28 14:31:46,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-28 14:31:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:31:46,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:46,924 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, 1, 1] [2020-10-28 14:31:46,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:31:46,925 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash -52699926, now seen corresponding path program 2 times [2020-10-28 14:31:46,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:46,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066587678] [2020-10-28 14:31:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:46,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:47,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:47,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:31:47,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:47,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-28 14:31:47,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:47,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:47,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:47,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:47,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:31:47,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:47,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:47,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:47,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:47,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:47,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:47,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:47,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:47,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:47,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:47,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:47,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:47,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066587678] [2020-10-28 14:31:47,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:47,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:47,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214038498] [2020-10-28 14:31:47,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:47,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:47,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:47,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:47,533 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 12 states. [2020-10-28 14:31:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:48,220 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2020-10-28 14:31:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:31:48,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:31:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:48,223 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:31:48,223 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:31:48,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:31:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:31:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 92. [2020-10-28 14:31:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 14:31:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-28 14:31:48,234 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 32 [2020-10-28 14:31:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:48,234 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-28 14:31:48,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-28 14:31:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:48,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:48,235 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:48,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:31:48,235 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:48,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1516025913, now seen corresponding path program 5 times [2020-10-28 14:31:48,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:48,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324816302] [2020-10-28 14:31:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:48,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:48,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:48,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:48,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-28 14:31:48,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:48,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:31:48,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:48,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:48,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:48,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:48,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:48,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:48,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:48,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:48,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:48,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:48,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:48,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:48,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:48,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324816302] [2020-10-28 14:31:48,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:48,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:48,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715421730] [2020-10-28 14:31:48,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:48,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:48,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:48,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:48,781 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 11 states. [2020-10-28 14:31:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:49,260 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2020-10-28 14:31:49,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:31:49,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-28 14:31:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:49,262 INFO L225 Difference]: With dead ends: 107 [2020-10-28 14:31:49,262 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 14:31:49,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:31:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 14:31:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 14:31:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 14:31:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-10-28 14:31:49,282 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 35 [2020-10-28 14:31:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:49,282 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-10-28 14:31:49,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-10-28 14:31:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:49,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:49,283 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:49,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:31:49,283 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash 348486905, now seen corresponding path program 2 times [2020-10-28 14:31:49,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:49,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843974756] [2020-10-28 14:31:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:49,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:49,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:50,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:50,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:50,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:50,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-28 14:31:50,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:50,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:50,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:50,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:50,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:31:50,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:50,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:50,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:50,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:50,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:50,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:50,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:50,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:50,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:50,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:50,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-28 14:31:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:50,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843974756] [2020-10-28 14:31:50,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:50,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:50,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205447533] [2020-10-28 14:31:50,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:50,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:50,585 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 13 states. [2020-10-28 14:31:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:51,320 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2020-10-28 14:31:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:51,320 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:31:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:51,322 INFO L225 Difference]: With dead ends: 136 [2020-10-28 14:31:51,322 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 14:31:51,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 14:31:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 79. [2020-10-28 14:31:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 14:31:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2020-10-28 14:31:51,333 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 35 [2020-10-28 14:31:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:51,334 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2020-10-28 14:31:51,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2020-10-28 14:31:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:51,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:51,334 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-28 14:31:51,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:31:51,335 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:51,335 INFO L82 PathProgramCache]: Analyzing trace with hash 771188731, now seen corresponding path program 3 times [2020-10-28 14:31:51,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:51,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768222186] [2020-10-28 14:31:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:51,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:51,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:52,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:52,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:52,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:52,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-28 14:31:52,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:52,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:52,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:31:52,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:52,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:52,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:52,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:52,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:52,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:52,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:52,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:52,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:52,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:52,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768222186] [2020-10-28 14:31:52,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:52,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:52,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286515193] [2020-10-28 14:31:52,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:52,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:52,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:52,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:52,599 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 13 states. [2020-10-28 14:31:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:53,370 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2020-10-28 14:31:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:31:53,371 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:31:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:53,372 INFO L225 Difference]: With dead ends: 126 [2020-10-28 14:31:53,372 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 14:31:53,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 14:31:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 76. [2020-10-28 14:31:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:31:53,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2020-10-28 14:31:53,385 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 35 [2020-10-28 14:31:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:53,385 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2020-10-28 14:31:53,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2020-10-28 14:31:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:53,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:53,386 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] [2020-10-28 14:31:53,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:31:53,386 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:53,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1650039419, now seen corresponding path program 4 times [2020-10-28 14:31:53,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:53,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435415192] [2020-10-28 14:31:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:53,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:53,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:54,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:54,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:54,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-28 14:31:54,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:54,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:54,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:54,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:54,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:31:54,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:54,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:54,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:54,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:54,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:54,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:54,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:54,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:54,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:54,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:54,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:54,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435415192] [2020-10-28 14:31:54,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:54,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:54,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568484074] [2020-10-28 14:31:54,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:54,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:54,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:54,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:54,681 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand 12 states. [2020-10-28 14:31:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:55,376 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2020-10-28 14:31:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:55,376 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:31:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:55,377 INFO L225 Difference]: With dead ends: 112 [2020-10-28 14:31:55,377 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:31:55,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:31:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2020-10-28 14:31:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:31:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-28 14:31:55,392 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 35 [2020-10-28 14:31:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:55,393 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-28 14:31:55,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-28 14:31:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:55,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:55,394 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-10-28 14:31:55,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:31:55,396 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash 493965601, now seen corresponding path program 4 times [2020-10-28 14:31:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:55,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998479455] [2020-10-28 14:31:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:55,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:55,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:55,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:55,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:55,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-28 14:31:55,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:55,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:55,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:55,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:55,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:31:55,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:56,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:56,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:56,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:56,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:56,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:56,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:56,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:56,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:56,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:56,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:56,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:56,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:56,063 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 14:31:56,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998479455] [2020-10-28 14:31:56,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:56,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:56,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931260575] [2020-10-28 14:31:56,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:56,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:56,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:56,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:56,065 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 12 states. [2020-10-28 14:31:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:56,757 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-10-28 14:31:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:56,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:31:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:56,758 INFO L225 Difference]: With dead ends: 110 [2020-10-28 14:31:56,758 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 14:31:56,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 14:31:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2020-10-28 14:31:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:31:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-28 14:31:56,768 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 35 [2020-10-28 14:31:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:56,768 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-28 14:31:56,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-28 14:31:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:56,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:56,769 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-28 14:31:56,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:31:56,769 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash 214473399, now seen corresponding path program 5 times [2020-10-28 14:31:56,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:56,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990973159] [2020-10-28 14:31:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:56,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:57,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:57,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:57,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:57,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-28 14:31:57,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:57,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:57,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:57,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:57,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:31:57,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:57,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:57,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:57,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:57,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:57,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:57,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:57,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:57,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:57,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:57,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:57,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990973159] [2020-10-28 14:31:57,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:57,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:57,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746878028] [2020-10-28 14:31:57,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:57,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:57,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:57,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:57,727 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 13 states. [2020-10-28 14:31:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:58,626 INFO L93 Difference]: Finished difference Result 143 states and 168 transitions. [2020-10-28 14:31:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:58,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:31:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:58,628 INFO L225 Difference]: With dead ends: 143 [2020-10-28 14:31:58,628 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:31:58,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:31:58,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:31:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2020-10-28 14:31:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 14:31:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2020-10-28 14:31:58,646 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 35 [2020-10-28 14:31:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:58,646 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2020-10-28 14:31:58,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2020-10-28 14:31:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:58,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:58,648 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] [2020-10-28 14:31:58,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:31:58,648 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash 407202121, now seen corresponding path program 5 times [2020-10-28 14:31:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:58,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901209025] [2020-10-28 14:31:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:58,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:58,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:59,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:59,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:59,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:59,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-28 14:31:59,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:59,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:59,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:59,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:59,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:31:59,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:59,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:59,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:59,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:59,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:59,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:59,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:59,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:59,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:59,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:59,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901209025] [2020-10-28 14:31:59,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:59,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:59,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59736369] [2020-10-28 14:31:59,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:59,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:59,722 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand 13 states. [2020-10-28 14:32:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:00,610 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2020-10-28 14:32:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:00,611 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:32:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:00,612 INFO L225 Difference]: With dead ends: 163 [2020-10-28 14:32:00,612 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:32:00,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:32:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 120. [2020-10-28 14:32:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 14:32:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 138 transitions. [2020-10-28 14:32:00,635 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 138 transitions. Word has length 35 [2020-10-28 14:32:00,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:00,635 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 138 transitions. [2020-10-28 14:32:00,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:32:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 138 transitions. [2020-10-28 14:32:00,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:32:00,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:00,636 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-10-28 14:32:00,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:32:00,636 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:00,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1743760155, now seen corresponding path program 6 times [2020-10-28 14:32:00,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:00,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008835929] [2020-10-28 14:32:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:00,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:00,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:01,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:01,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:32:01,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:01,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-10-28 14:32:01,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:01,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:01,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:32:01,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:01,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:32:01,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:02,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:02,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:02,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:02,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:02,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:02,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:02,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:02,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:02,330 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 14:32:02,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008835929] [2020-10-28 14:32:02,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:02,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:32:02,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467855125] [2020-10-28 14:32:02,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:32:02,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:32:02,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:02,332 INFO L87 Difference]: Start difference. First operand 120 states and 138 transitions. Second operand 13 states. [2020-10-28 14:32:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:03,175 INFO L93 Difference]: Finished difference Result 150 states and 173 transitions. [2020-10-28 14:32:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:03,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:32:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:03,178 INFO L225 Difference]: With dead ends: 150 [2020-10-28 14:32:03,178 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 14:32:03,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 14:32:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-10-28 14:32:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 14:32:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-10-28 14:32:03,190 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 35 [2020-10-28 14:32:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:03,191 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-10-28 14:32:03,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:32:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-10-28 14:32:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:32:03,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:03,191 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:03,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:32:03,192 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:03,192 INFO L82 PathProgramCache]: Analyzing trace with hash 273188615, now seen corresponding path program 5 times [2020-10-28 14:32:03,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:03,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626155572] [2020-10-28 14:32:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:03,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:03,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:03,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:03,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:32:03,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:03,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 664 [2020-10-28 14:32:03,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:03,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:03,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:32:03,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:03,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:32:03,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:04,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:04,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:04,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:04,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:04,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:04,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:04,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:04,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:04,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:04,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:04,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:04,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:04,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626155572] [2020-10-28 14:32:04,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:04,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:32:04,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037904128] [2020-10-28 14:32:04,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:32:04,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:04,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:32:04,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:04,146 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 13 states. [2020-10-28 14:32:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:05,321 INFO L93 Difference]: Finished difference Result 179 states and 208 transitions. [2020-10-28 14:32:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:32:05,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:32:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:05,322 INFO L225 Difference]: With dead ends: 179 [2020-10-28 14:32:05,323 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 14:32:05,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:32:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 14:32:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2020-10-28 14:32:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 14:32:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2020-10-28 14:32:05,341 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 35 [2020-10-28 14:32:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:05,341 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2020-10-28 14:32:05,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:32:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2020-10-28 14:32:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:32:05,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:05,358 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, 1] [2020-10-28 14:32:05,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:32:05,359 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:05,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1877773661, now seen corresponding path program 3 times [2020-10-28 14:32:05,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:05,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644152409] [2020-10-28 14:32:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:05,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:06,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:06,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:32:06,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:06,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-28 14:32:06,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:06,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:06,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:32:06,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:06,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:32:06,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:06,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:06,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:06,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:06,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:06,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:06,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:06,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:06,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:06,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:06,542 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 14:32:06,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644152409] [2020-10-28 14:32:06,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:06,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:06,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083023796] [2020-10-28 14:32:06,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:06,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:06,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:06,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:06,543 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand 12 states. [2020-10-28 14:32:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:07,210 INFO L93 Difference]: Finished difference Result 197 states and 229 transitions. [2020-10-28 14:32:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:32:07,211 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:32:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:07,213 INFO L225 Difference]: With dead ends: 197 [2020-10-28 14:32:07,213 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 14:32:07,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:32:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 14:32:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 136. [2020-10-28 14:32:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 14:32:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2020-10-28 14:32:07,230 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 35 [2020-10-28 14:32:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:07,231 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2020-10-28 14:32:07,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2020-10-28 14:32:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:32:07,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:07,232 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, 1, 1] [2020-10-28 14:32:07,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:32:07,232 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:07,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:07,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1146077682, now seen corresponding path program 7 times [2020-10-28 14:32:07,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:07,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216942930] [2020-10-28 14:32:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:07,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:07,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:32:07,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:07,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-28 14:32:07,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:07,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:07,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:32:07,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:07,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:32:07,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:08,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:08,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:08,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:08,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:08,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:08,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:08,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:08,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:08,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216942930] [2020-10-28 14:32:08,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:08,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:32:08,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101047338] [2020-10-28 14:32:08,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:32:08,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:08,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:32:08,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:08,050 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand 13 states. [2020-10-28 14:32:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:09,211 INFO L93 Difference]: Finished difference Result 198 states and 229 transitions. [2020-10-28 14:32:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:09,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 14:32:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:09,214 INFO L225 Difference]: With dead ends: 198 [2020-10-28 14:32:09,214 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 14:32:09,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 14:32:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-28 14:32:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:32:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2020-10-28 14:32:09,232 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 38 [2020-10-28 14:32:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:09,232 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2020-10-28 14:32:09,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:32:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2020-10-28 14:32:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:32:09,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:09,233 INFO L422 BasicCegarLoop]: trace histogram [5, 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 14:32:09,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:32:09,233 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash -530082960, now seen corresponding path program 6 times [2020-10-28 14:32:09,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:09,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177630709] [2020-10-28 14:32:09,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:09,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:09,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:09,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:09,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:32:09,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:09,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-28 14:32:09,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:09,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:09,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:32:09,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:09,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:32:09,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:09,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:09,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:09,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:09,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:09,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:09,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:09,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:09,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:09,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:09,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:09,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:09,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:09,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177630709] [2020-10-28 14:32:09,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:09,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:09,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852172703] [2020-10-28 14:32:09,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:09,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:09,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:09,976 INFO L87 Difference]: Start difference. First operand 144 states and 163 transitions. Second operand 12 states. [2020-10-28 14:32:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:10,705 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2020-10-28 14:32:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:32:10,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-28 14:32:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:10,707 INFO L225 Difference]: With dead ends: 172 [2020-10-28 14:32:10,707 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 14:32:10,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 14:32:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-28 14:32:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 14:32:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2020-10-28 14:32:10,720 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 38 [2020-10-28 14:32:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:10,720 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2020-10-28 14:32:10,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2020-10-28 14:32:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:32:10,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:10,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:10,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:32:10,721 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:10,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1059314202, now seen corresponding path program 7 times [2020-10-28 14:32:10,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:10,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36661484] [2020-10-28 14:32:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:10,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:10,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:11,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:12,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:12,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:32:12,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1969 [2020-10-28 14:32:12,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:12,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:32:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:32:12,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:13,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:13,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:13,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:13,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:13,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:13,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:13,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:13,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:13,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:13,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:13,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:13,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:13,021 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 14:32:13,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36661484] [2020-10-28 14:32:13,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:13,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:13,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465898645] [2020-10-28 14:32:13,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:13,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:13,023 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand 14 states. [2020-10-28 14:32:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:14,273 INFO L93 Difference]: Finished difference Result 220 states and 252 transitions. [2020-10-28 14:32:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:32:14,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:32:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:14,275 INFO L225 Difference]: With dead ends: 220 [2020-10-28 14:32:14,275 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 14:32:14,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:32:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 14:32:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 153. [2020-10-28 14:32:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-28 14:32:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2020-10-28 14:32:14,295 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 38 [2020-10-28 14:32:14,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:14,295 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2020-10-28 14:32:14,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2020-10-28 14:32:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:32:14,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:14,297 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, 1, 1] [2020-10-28 14:32:14,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:32:14,297 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1091648074, now seen corresponding path program 8 times [2020-10-28 14:32:14,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:14,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499538066] [2020-10-28 14:32:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:14,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:14,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:32:14,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:14,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-28 14:32:14,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:14,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:32:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:32:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:15,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:15,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:15,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:15,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:15,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:15,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:15,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:15,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:15,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:15,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:15,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:15,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499538066] [2020-10-28 14:32:15,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:15,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:15,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826021444] [2020-10-28 14:32:15,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:15,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:15,193 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand 14 states. [2020-10-28 14:32:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:16,290 INFO L93 Difference]: Finished difference Result 197 states and 226 transitions. [2020-10-28 14:32:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:16,290 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:32:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:16,292 INFO L225 Difference]: With dead ends: 197 [2020-10-28 14:32:16,292 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 14:32:16,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:32:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 14:32:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 170. [2020-10-28 14:32:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 14:32:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 195 transitions. [2020-10-28 14:32:16,313 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 195 transitions. Word has length 38 [2020-10-28 14:32:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:16,313 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 195 transitions. [2020-10-28 14:32:16,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 195 transitions. [2020-10-28 14:32:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:32:16,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:16,314 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:16,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:32:16,315 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:16,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:16,315 INFO L82 PathProgramCache]: Analyzing trace with hash 925300696, now seen corresponding path program 8 times [2020-10-28 14:32:16,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:16,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43335026] [2020-10-28 14:32:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:16,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:16,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:18,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:18,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:32:18,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:18,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2111 [2020-10-28 14:32:18,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:18,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:18,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:32:18,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:18,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:32:18,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:18,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:18,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:18,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:18,802 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 14:32:18,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43335026] [2020-10-28 14:32:18,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:18,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:18,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636753634] [2020-10-28 14:32:18,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:18,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:18,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:18,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:18,803 INFO L87 Difference]: Start difference. First operand 170 states and 195 transitions. Second operand 14 states. [2020-10-28 14:32:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:20,111 INFO L93 Difference]: Finished difference Result 220 states and 253 transitions. [2020-10-28 14:32:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:32:20,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:32:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:20,113 INFO L225 Difference]: With dead ends: 220 [2020-10-28 14:32:20,113 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 14:32:20,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:32:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 14:32:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 147. [2020-10-28 14:32:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 14:32:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2020-10-28 14:32:20,132 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 38 [2020-10-28 14:32:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:20,133 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2020-10-28 14:32:20,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2020-10-28 14:32:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:32:20,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:20,134 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, 1, 1] [2020-10-28 14:32:20,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:32:20,134 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:20,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1225661580, now seen corresponding path program 9 times [2020-10-28 14:32:20,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:20,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822990717] [2020-10-28 14:32:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:20,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:20,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:20,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:32:20,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:20,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-28 14:32:20,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:20,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:20,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:32:20,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:20,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:32:20,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:20,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:20,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:20,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:20,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:20,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:20,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:20,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:20,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:20,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:20,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822990717] [2020-10-28 14:32:20,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:20,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:20,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914918395] [2020-10-28 14:32:20,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:20,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:20,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:20,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:20,976 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand 14 states. [2020-10-28 14:32:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:22,008 INFO L93 Difference]: Finished difference Result 194 states and 223 transitions. [2020-10-28 14:32:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:22,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:32:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:22,011 INFO L225 Difference]: With dead ends: 194 [2020-10-28 14:32:22,011 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 14:32:22,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 14:32:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2020-10-28 14:32:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 14:32:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2020-10-28 14:32:22,030 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 38 [2020-10-28 14:32:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:22,030 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2020-10-28 14:32:22,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2020-10-28 14:32:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:32:22,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:22,031 INFO L422 BasicCegarLoop]: trace histogram [5, 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 14:32:22,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:32:22,032 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:22,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:22,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1864288556, now seen corresponding path program 9 times [2020-10-28 14:32:22,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:22,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002388352] [2020-10-28 14:32:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:22,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:22,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:22,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:22,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:32:22,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:22,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-28 14:32:22,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:22,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:22,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:32:22,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:22,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:32:22,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:22,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:22,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:22,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:22,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002388352] [2020-10-28 14:32:22,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:22,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:32:22,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885971777] [2020-10-28 14:32:22,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:32:22,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:22,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:32:22,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:22,909 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand 13 states. [2020-10-28 14:32:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:23,681 INFO L93 Difference]: Finished difference Result 162 states and 184 transitions. [2020-10-28 14:32:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:32:23,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 14:32:23,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:23,683 INFO L225 Difference]: With dead ends: 162 [2020-10-28 14:32:23,683 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 14:32:23,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 14:32:23,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-28 14:32:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 14:32:23,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2020-10-28 14:32:23,700 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 38 [2020-10-28 14:32:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:23,700 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2020-10-28 14:32:23,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:32:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2020-10-28 14:32:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:32:23,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:23,701 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:23,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:32:23,702 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:23,702 INFO L82 PathProgramCache]: Analyzing trace with hash -507450706, now seen corresponding path program 6 times [2020-10-28 14:32:23,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:23,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516740766] [2020-10-28 14:32:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:23,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:24,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:25,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:25,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:32:25,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:25,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1534 [2020-10-28 14:32:25,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:25,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:32:25,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:25,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:32:25,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:25,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:25,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:25,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:25,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:25,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:25,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:32:25,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:25,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:25,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:25,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:25,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:25,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:25,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516740766] [2020-10-28 14:32:25,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:25,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:25,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821530529] [2020-10-28 14:32:25,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:25,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:25,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:25,773 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand 14 states. [2020-10-28 14:32:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:26,856 INFO L93 Difference]: Finished difference Result 180 states and 210 transitions. [2020-10-28 14:32:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:32:26,857 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:32:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:26,857 INFO L225 Difference]: With dead ends: 180 [2020-10-28 14:32:26,858 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 14:32:26,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:32:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 14:32:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 141. [2020-10-28 14:32:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 14:32:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2020-10-28 14:32:26,876 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 38 [2020-10-28 14:32:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:26,876 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2020-10-28 14:32:26,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2020-10-28 14:32:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:32:26,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:26,877 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:26,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:32:26,877 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:26,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1636554314, now seen corresponding path program 4 times [2020-10-28 14:32:26,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:26,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173344322] [2020-10-28 14:32:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:26,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:27,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:27,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:27,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:32:27,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:27,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-28 14:32:27,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:27,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:27,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:32:27,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:27,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:32:27,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:28,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:28,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:28,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:28,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173344322] [2020-10-28 14:32:28,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:28,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:28,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994680387] [2020-10-28 14:32:28,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:28,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:28,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:28,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:28,485 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand 14 states. [2020-10-28 14:32:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:29,583 INFO L93 Difference]: Finished difference Result 170 states and 196 transitions. [2020-10-28 14:32:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:32:29,584 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:32:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:29,585 INFO L225 Difference]: With dead ends: 170 [2020-10-28 14:32:29,586 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 14:32:29,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:32:29,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 14:32:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2020-10-28 14:32:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 14:32:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2020-10-28 14:32:29,606 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 38 [2020-10-28 14:32:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:29,606 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2020-10-28 14:32:29,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2020-10-28 14:32:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:29,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:29,607 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 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 14:32:29,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:32:29,608 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:29,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2080950845, now seen corresponding path program 3 times [2020-10-28 14:32:29,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:29,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889480388] [2020-10-28 14:32:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:29,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:29,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:30,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:30,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:30,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:30,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-28 14:32:30,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:30,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:30,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:32:30,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:30,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:32:30,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:30,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:30,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:30,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:30,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:30,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:30,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:30,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:30,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:30,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:30,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:30,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:30,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:30,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889480388] [2020-10-28 14:32:30,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:30,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:30,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630039346] [2020-10-28 14:32:30,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:30,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:30,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:30,731 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand 15 states. [2020-10-28 14:32:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:31,960 INFO L93 Difference]: Finished difference Result 224 states and 256 transitions. [2020-10-28 14:32:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:31,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:32:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:31,963 INFO L225 Difference]: With dead ends: 224 [2020-10-28 14:32:31,963 INFO L226 Difference]: Without dead ends: 220 [2020-10-28 14:32:31,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:32:31,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-28 14:32:31,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 142. [2020-10-28 14:32:31,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:32:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2020-10-28 14:32:31,983 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 41 [2020-10-28 14:32:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:31,984 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2020-10-28 14:32:31,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2020-10-28 14:32:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:31,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:31,985 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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 14:32:31,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:32:31,985 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2080002945, now seen corresponding path program 10 times [2020-10-28 14:32:31,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:31,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282531721] [2020-10-28 14:32:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:32,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:32,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:33,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:33,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:33,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:33,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-28 14:32:33,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:33,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:33,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:32:33,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:33,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:32:33,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:33,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:33,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:33,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:33,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:33,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:33,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:33,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:33,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:33,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:33,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:33,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:33,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282531721] [2020-10-28 14:32:33,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:33,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:33,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968822667] [2020-10-28 14:32:33,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:33,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:33,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:33,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:33,589 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand 15 states. [2020-10-28 14:32:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:34,718 INFO L93 Difference]: Finished difference Result 216 states and 250 transitions. [2020-10-28 14:32:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:34,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:32:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:34,721 INFO L225 Difference]: With dead ends: 216 [2020-10-28 14:32:34,721 INFO L226 Difference]: Without dead ends: 212 [2020-10-28 14:32:34,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:32:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-28 14:32:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 139. [2020-10-28 14:32:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 14:32:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2020-10-28 14:32:34,741 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 41 [2020-10-28 14:32:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:34,742 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2020-10-28 14:32:34,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2020-10-28 14:32:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:34,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:34,743 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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 14:32:34,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:32:34,743 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:34,743 INFO L82 PathProgramCache]: Analyzing trace with hash -157722811, now seen corresponding path program 11 times [2020-10-28 14:32:34,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:34,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930325216] [2020-10-28 14:32:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:34,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:32:35,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:35,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:35,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:35,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:35,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:35,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:35,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:35,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930325216] [2020-10-28 14:32:35,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:35,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:35,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043163152] [2020-10-28 14:32:35,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:35,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:35,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:35,874 INFO L87 Difference]: Start difference. First operand 139 states and 159 transitions. Second operand 14 states. [2020-10-28 14:32:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:36,654 INFO L93 Difference]: Finished difference Result 226 states and 263 transitions. [2020-10-28 14:32:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:36,655 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 14:32:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:36,656 INFO L225 Difference]: With dead ends: 226 [2020-10-28 14:32:36,656 INFO L226 Difference]: Without dead ends: 208 [2020-10-28 14:32:36,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-28 14:32:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-28 14:32:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-28 14:32:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 177 transitions. [2020-10-28 14:32:36,680 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 177 transitions. Word has length 41 [2020-10-28 14:32:36,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:36,681 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 177 transitions. [2020-10-28 14:32:36,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 177 transitions. [2020-10-28 14:32:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:36,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:36,682 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] [2020-10-28 14:32:36,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:32:36,682 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:36,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:36,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1496753477, now seen corresponding path program 10 times [2020-10-28 14:32:36,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:36,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010076197] [2020-10-28 14:32:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:36,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:37,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:37,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:37,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:37,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-10-28 14:32:37,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:37,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:32:37,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:38,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:38,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:38,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:38,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:38,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:38,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:38,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:38,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:38,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:38,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:38,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010076197] [2020-10-28 14:32:38,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:38,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:38,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404772677] [2020-10-28 14:32:38,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:38,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:38,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:38,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:38,119 INFO L87 Difference]: Start difference. First operand 155 states and 177 transitions. Second operand 15 states. [2020-10-28 14:32:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:39,463 INFO L93 Difference]: Finished difference Result 252 states and 289 transitions. [2020-10-28 14:32:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:32:39,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:32:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:39,465 INFO L225 Difference]: With dead ends: 252 [2020-10-28 14:32:39,465 INFO L226 Difference]: Without dead ends: 239 [2020-10-28 14:32:39,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-28 14:32:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 215. [2020-10-28 14:32:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 14:32:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 245 transitions. [2020-10-28 14:32:39,498 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 245 transitions. Word has length 41 [2020-10-28 14:32:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:39,498 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 245 transitions. [2020-10-28 14:32:39,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 245 transitions. [2020-10-28 14:32:39,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:39,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:39,499 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:39,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:32:39,499 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash 647251543, now seen corresponding path program 12 times [2020-10-28 14:32:39,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:39,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458398724] [2020-10-28 14:32:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:39,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:40,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:41,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:41,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:41,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-28 14:32:41,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:41,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:41,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:41,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:41,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:32:41,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:41,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:41,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:41,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:41,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:41,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:41,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:41,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:41,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:41,458 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 14:32:41,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458398724] [2020-10-28 14:32:41,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:41,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:41,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969108259] [2020-10-28 14:32:41,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:41,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:41,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:41,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:41,459 INFO L87 Difference]: Start difference. First operand 215 states and 245 transitions. Second operand 15 states. [2020-10-28 14:32:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:42,798 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2020-10-28 14:32:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:32:42,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:32:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:42,800 INFO L225 Difference]: With dead ends: 239 [2020-10-28 14:32:42,800 INFO L226 Difference]: Without dead ends: 235 [2020-10-28 14:32:42,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:42,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-28 14:32:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 178. [2020-10-28 14:32:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-28 14:32:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 204 transitions. [2020-10-28 14:32:42,831 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 204 transitions. Word has length 41 [2020-10-28 14:32:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:42,831 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 204 transitions. [2020-10-28 14:32:42,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 204 transitions. [2020-10-28 14:32:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:42,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:42,832 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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 14:32:42,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:32:42,832 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:42,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:42,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2058318591, now seen corresponding path program 13 times [2020-10-28 14:32:42,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:42,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684735213] [2020-10-28 14:32:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:42,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:43,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:43,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:43,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:43,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-28 14:32:43,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:43,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:43,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:32:43,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:43,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:32:43,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:43,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:43,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:43,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:43,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:43,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:43,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:43,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:43,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:43,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:43,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684735213] [2020-10-28 14:32:43,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:43,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:43,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234466975] [2020-10-28 14:32:43,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:43,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:43,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:43,898 INFO L87 Difference]: Start difference. First operand 178 states and 204 transitions. Second operand 15 states. [2020-10-28 14:32:45,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:45,407 INFO L93 Difference]: Finished difference Result 231 states and 267 transitions. [2020-10-28 14:32:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:45,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:32:45,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:45,410 INFO L225 Difference]: With dead ends: 231 [2020-10-28 14:32:45,410 INFO L226 Difference]: Without dead ends: 227 [2020-10-28 14:32:45,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:32:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-28 14:32:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 162. [2020-10-28 14:32:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 14:32:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2020-10-28 14:32:45,434 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 41 [2020-10-28 14:32:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:45,435 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2020-10-28 14:32:45,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2020-10-28 14:32:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:45,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:45,436 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] [2020-10-28 14:32:45,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:32:45,436 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:45,436 INFO L82 PathProgramCache]: Analyzing trace with hash 426474557, now seen corresponding path program 11 times [2020-10-28 14:32:45,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:45,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133452748] [2020-10-28 14:32:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:45,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:45,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:46,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:46,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-28 14:32:46,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:46,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:32:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:46,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:46,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:46,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:46,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:46,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:46,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:46,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:46,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:46,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:46,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:46,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:46,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133452748] [2020-10-28 14:32:46,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:46,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:46,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447831476] [2020-10-28 14:32:46,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:46,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:46,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:46,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:46,813 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand 15 states. [2020-10-28 14:32:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:48,596 INFO L93 Difference]: Finished difference Result 262 states and 302 transitions. [2020-10-28 14:32:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:32:48,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:32:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:48,598 INFO L225 Difference]: With dead ends: 262 [2020-10-28 14:32:48,598 INFO L226 Difference]: Without dead ends: 258 [2020-10-28 14:32:48,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:32:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-28 14:32:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 215. [2020-10-28 14:32:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 14:32:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 245 transitions. [2020-10-28 14:32:48,623 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 245 transitions. Word has length 41 [2020-10-28 14:32:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:48,623 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 245 transitions. [2020-10-28 14:32:48,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 245 transitions. [2020-10-28 14:32:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:48,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:48,624 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:48,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:32:48,624 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1724487719, now seen corresponding path program 14 times [2020-10-28 14:32:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:48,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216872006] [2020-10-28 14:32:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:48,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:48,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:49,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:49,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:49,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:49,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-28 14:32:49,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:49,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:32:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:32:49,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:50,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:50,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:50,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:50,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:50,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:50,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:50,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:50,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:50,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:50,091 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 14:32:50,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216872006] [2020-10-28 14:32:50,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:50,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:50,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502964719] [2020-10-28 14:32:50,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:50,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:50,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:50,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:50,092 INFO L87 Difference]: Start difference. First operand 215 states and 245 transitions. Second operand 14 states. [2020-10-28 14:32:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:51,065 INFO L93 Difference]: Finished difference Result 277 states and 321 transitions. [2020-10-28 14:32:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:32:51,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 14:32:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:51,068 INFO L225 Difference]: With dead ends: 277 [2020-10-28 14:32:51,068 INFO L226 Difference]: Without dead ends: 259 [2020-10-28 14:32:51,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:32:51,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-28 14:32:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 213. [2020-10-28 14:32:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-28 14:32:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 242 transitions. [2020-10-28 14:32:51,099 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 242 transitions. Word has length 41 [2020-10-28 14:32:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:51,099 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 242 transitions. [2020-10-28 14:32:51,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 242 transitions. [2020-10-28 14:32:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:51,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:51,100 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:51,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:32:51,100 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1819506531, now seen corresponding path program 15 times [2020-10-28 14:32:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:51,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804224925] [2020-10-28 14:32:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:51,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:51,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:52,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:52,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:52,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:52,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-28 14:32:52,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:52,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:52,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:32:52,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:52,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:32:52,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:53,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:53,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:53,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:53,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:53,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:53,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:53,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:53,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:53,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:53,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:53,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:53,022 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 14:32:53,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804224925] [2020-10-28 14:32:53,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:53,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:53,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875322039] [2020-10-28 14:32:53,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:53,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:53,023 INFO L87 Difference]: Start difference. First operand 213 states and 242 transitions. Second operand 15 states. [2020-10-28 14:32:53,506 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-28 14:32:53,789 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-28 14:32:53,985 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-28 14:32:54,311 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-28 14:32:54,501 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-28 14:32:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:55,392 INFO L93 Difference]: Finished difference Result 263 states and 304 transitions. [2020-10-28 14:32:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:32:55,392 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:32:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:55,394 INFO L225 Difference]: With dead ends: 263 [2020-10-28 14:32:55,394 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 14:32:55,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:32:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 14:32:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 205. [2020-10-28 14:32:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-28 14:32:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 233 transitions. [2020-10-28 14:32:55,426 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 233 transitions. Word has length 41 [2020-10-28 14:32:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:55,426 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 233 transitions. [2020-10-28 14:32:55,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 233 transitions. [2020-10-28 14:32:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:55,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:55,427 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:55,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:32:55,428 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:55,428 INFO L82 PathProgramCache]: Analyzing trace with hash 714445223, now seen corresponding path program 7 times [2020-10-28 14:32:55,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:55,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172765126] [2020-10-28 14:32:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:55,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:55,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:57,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:57,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:32:57,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:57,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2296 [2020-10-28 14:32:57,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:57,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:57,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:32:57,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:57,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:32:57,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:58,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:58,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:58,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:58,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:58,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:58,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:58,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:58,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:58,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172765126] [2020-10-28 14:32:58,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:58,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:32:58,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152141884] [2020-10-28 14:32:58,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:32:58,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:32:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:58,093 INFO L87 Difference]: Start difference. First operand 205 states and 233 transitions. Second operand 14 states. [2020-10-28 14:32:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:59,282 INFO L93 Difference]: Finished difference Result 265 states and 299 transitions. [2020-10-28 14:32:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:32:59,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 14:32:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:59,284 INFO L225 Difference]: With dead ends: 265 [2020-10-28 14:32:59,284 INFO L226 Difference]: Without dead ends: 209 [2020-10-28 14:32:59,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:32:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-28 14:32:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2020-10-28 14:32:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 14:32:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 237 transitions. [2020-10-28 14:32:59,326 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 237 transitions. Word has length 41 [2020-10-28 14:32:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:59,327 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 237 transitions. [2020-10-28 14:32:59,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:32:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 237 transitions. [2020-10-28 14:32:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:32:59,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:59,328 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] [2020-10-28 14:32:59,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:32:59,328 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:59,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1569140035, now seen corresponding path program 12 times [2020-10-28 14:32:59,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:59,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616903329] [2020-10-28 14:32:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:59,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:59,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:59,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:00,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:03,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:03,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:33:03,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:03,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3859 [2020-10-28 14:33:03,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:03,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:03,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:33:03,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:03,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:33:03,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:03,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:03,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:03,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:03,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:03,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:03,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:03,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:03,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:03,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:03,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:03,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:03,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:03,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616903329] [2020-10-28 14:33:03,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:03,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:03,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287723410] [2020-10-28 14:33:03,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:03,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:03,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:03,642 INFO L87 Difference]: Start difference. First operand 209 states and 237 transitions. Second operand 16 states. [2020-10-28 14:33:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:05,618 INFO L93 Difference]: Finished difference Result 331 states and 377 transitions. [2020-10-28 14:33:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:33:05,618 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 14:33:05,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:05,620 INFO L225 Difference]: With dead ends: 331 [2020-10-28 14:33:05,620 INFO L226 Difference]: Without dead ends: 327 [2020-10-28 14:33:05,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:33:05,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-28 14:33:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 265. [2020-10-28 14:33:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-28 14:33:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 302 transitions. [2020-10-28 14:33:05,647 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 302 transitions. Word has length 41 [2020-10-28 14:33:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:05,648 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 302 transitions. [2020-10-28 14:33:05,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 302 transitions. [2020-10-28 14:33:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:33:05,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:05,649 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:05,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:33:05,649 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash 574864985, now seen corresponding path program 16 times [2020-10-28 14:33:05,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:05,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156854488] [2020-10-28 14:33:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:05,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:05,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:33:06,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:07,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:07,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:07,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:07,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:07,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:07,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:33:07,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:07,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:07,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:07,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:07,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:07,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:07,224 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 14:33:07,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156854488] [2020-10-28 14:33:07,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:07,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:07,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809066570] [2020-10-28 14:33:07,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:07,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:07,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:07,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:07,225 INFO L87 Difference]: Start difference. First operand 265 states and 302 transitions. Second operand 16 states. [2020-10-28 14:33:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:08,861 INFO L93 Difference]: Finished difference Result 341 states and 391 transitions. [2020-10-28 14:33:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:33:08,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 14:33:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:08,864 INFO L225 Difference]: With dead ends: 341 [2020-10-28 14:33:08,864 INFO L226 Difference]: Without dead ends: 337 [2020-10-28 14:33:08,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:33:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-28 14:33:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 296. [2020-10-28 14:33:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-28 14:33:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 338 transitions. [2020-10-28 14:33:08,909 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 338 transitions. Word has length 41 [2020-10-28 14:33:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:08,910 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 338 transitions. [2020-10-28 14:33:08,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 338 transitions. [2020-10-28 14:33:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:33:08,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:08,911 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:08,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:33:08,911 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:08,912 INFO L82 PathProgramCache]: Analyzing trace with hash 354087999, now seen corresponding path program 8 times [2020-10-28 14:33:08,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:08,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408664303] [2020-10-28 14:33:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:08,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:09,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:09,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:09,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:13,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:13,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:33:13,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4706 [2020-10-28 14:33:13,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:13,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:33:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:33:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:14,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:14,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:14,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:14,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:14,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:14,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:14,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:14,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:14,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:14,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:14,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:14,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:14,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408664303] [2020-10-28 14:33:14,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:14,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:14,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054272980] [2020-10-28 14:33:14,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:14,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:14,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:14,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:14,110 INFO L87 Difference]: Start difference. First operand 296 states and 338 transitions. Second operand 16 states. [2020-10-28 14:33:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:16,167 INFO L93 Difference]: Finished difference Result 369 states and 421 transitions. [2020-10-28 14:33:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:33:16,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 14:33:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:16,169 INFO L225 Difference]: With dead ends: 369 [2020-10-28 14:33:16,169 INFO L226 Difference]: Without dead ends: 365 [2020-10-28 14:33:16,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:33:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-28 14:33:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 269. [2020-10-28 14:33:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-28 14:33:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 305 transitions. [2020-10-28 14:33:16,209 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 305 transitions. Word has length 41 [2020-10-28 14:33:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:16,209 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 305 transitions. [2020-10-28 14:33:16,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 305 transitions. [2020-10-28 14:33:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:33:16,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:16,211 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, 1] [2020-10-28 14:33:16,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 14:33:16,211 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1796874277, now seen corresponding path program 5 times [2020-10-28 14:33:16,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:16,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925364681] [2020-10-28 14:33:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:16,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:16,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:17,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:17,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:33:17,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:17,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-28 14:33:17,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:17,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:17,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:33:17,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:17,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:33:17,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:17,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:17,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:17,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:17,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:17,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:17,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:17,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:17,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:17,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:17,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:17,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:17,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:17,945 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 14:33:17,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925364681] [2020-10-28 14:33:17,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:17,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:17,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137414974] [2020-10-28 14:33:17,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:17,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:17,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:17,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:17,946 INFO L87 Difference]: Start difference. First operand 269 states and 305 transitions. Second operand 16 states. [2020-10-28 14:33:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:19,558 INFO L93 Difference]: Finished difference Result 345 states and 394 transitions. [2020-10-28 14:33:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:33:19,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 14:33:19,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:19,561 INFO L225 Difference]: With dead ends: 345 [2020-10-28 14:33:19,561 INFO L226 Difference]: Without dead ends: 341 [2020-10-28 14:33:19,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:33:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-28 14:33:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 269. [2020-10-28 14:33:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-28 14:33:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 305 transitions. [2020-10-28 14:33:19,604 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 305 transitions. Word has length 41 [2020-10-28 14:33:19,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:19,604 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 305 transitions. [2020-10-28 14:33:19,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 305 transitions. [2020-10-28 14:33:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:19,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:19,605 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:19,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 14:33:19,606 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash 461179514, now seen corresponding path program 13 times [2020-10-28 14:33:19,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:19,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843698941] [2020-10-28 14:33:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:19,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:20,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:20,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:20,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:20,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-28 14:33:20,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:20,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:20,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:33:20,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:20,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:33:20,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:20,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:20,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:20,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:20,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:20,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:20,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:20,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:20,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:20,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:20,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:20,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:20,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:20,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843698941] [2020-10-28 14:33:20,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:20,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:20,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188127469] [2020-10-28 14:33:20,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:20,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:20,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:20,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:20,867 INFO L87 Difference]: Start difference. First operand 269 states and 305 transitions. Second operand 15 states. [2020-10-28 14:33:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:22,184 INFO L93 Difference]: Finished difference Result 289 states and 327 transitions. [2020-10-28 14:33:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:33:22,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-28 14:33:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:22,185 INFO L225 Difference]: With dead ends: 289 [2020-10-28 14:33:22,186 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 14:33:22,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:33:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 14:33:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-10-28 14:33:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-28 14:33:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 241 transitions. [2020-10-28 14:33:22,214 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 241 transitions. Word has length 44 [2020-10-28 14:33:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:22,215 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 241 transitions. [2020-10-28 14:33:22,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:33:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 241 transitions. [2020-10-28 14:33:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:22,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:22,215 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, 1, 1] [2020-10-28 14:33:22,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 14:33:22,216 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash 321599276, now seen corresponding path program 17 times [2020-10-28 14:33:22,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:22,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038127097] [2020-10-28 14:33:22,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:22,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:22,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:22,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:24,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:24,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:24,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:24,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2275 [2020-10-28 14:33:24,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:24,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:33:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:33:24,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:25,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:25,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:25,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:25,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:25,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:25,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:25,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:25,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:25,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:25,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038127097] [2020-10-28 14:33:25,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:25,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:33:25,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860500652] [2020-10-28 14:33:25,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:33:25,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:33:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:25,109 INFO L87 Difference]: Start difference. First operand 211 states and 241 transitions. Second operand 17 states. [2020-10-28 14:33:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:26,927 INFO L93 Difference]: Finished difference Result 337 states and 384 transitions. [2020-10-28 14:33:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:33:26,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:33:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:26,929 INFO L225 Difference]: With dead ends: 337 [2020-10-28 14:33:26,929 INFO L226 Difference]: Without dead ends: 333 [2020-10-28 14:33:26,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:33:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-28 14:33:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 230. [2020-10-28 14:33:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 14:33:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 265 transitions. [2020-10-28 14:33:26,970 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 265 transitions. Word has length 44 [2020-10-28 14:33:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:26,970 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 265 transitions. [2020-10-28 14:33:26,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:33:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 265 transitions. [2020-10-28 14:33:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:26,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:26,971 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-10-28 14:33:26,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 14:33:26,971 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2050139986, now seen corresponding path program 18 times [2020-10-28 14:33:26,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:26,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313700223] [2020-10-28 14:33:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:27,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:27,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:27,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:29,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:29,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:29,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:29,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2624 [2020-10-28 14:33:29,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:29,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:33:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:33:29,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:30,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:30,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:30,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:30,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:30,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:30,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:30,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:30,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:30,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:30,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:30,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313700223] [2020-10-28 14:33:30,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:30,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:33:30,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111827369] [2020-10-28 14:33:30,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:33:30,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:33:30,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:30,241 INFO L87 Difference]: Start difference. First operand 230 states and 265 transitions. Second operand 17 states. [2020-10-28 14:33:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:32,032 INFO L93 Difference]: Finished difference Result 315 states and 363 transitions. [2020-10-28 14:33:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:33:32,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:33:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:32,035 INFO L225 Difference]: With dead ends: 315 [2020-10-28 14:33:32,035 INFO L226 Difference]: Without dead ends: 311 [2020-10-28 14:33:32,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:33:32,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-28 14:33:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 224. [2020-10-28 14:33:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 14:33:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 257 transitions. [2020-10-28 14:33:32,074 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 257 transitions. Word has length 44 [2020-10-28 14:33:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:32,074 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 257 transitions. [2020-10-28 14:33:32,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:33:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 257 transitions. [2020-10-28 14:33:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:32,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:32,075 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:32,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-28 14:33:32,075 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash 483811768, now seen corresponding path program 14 times [2020-10-28 14:33:32,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:32,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451773933] [2020-10-28 14:33:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:32,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:34,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:34,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:34,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2213 [2020-10-28 14:33:34,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:34,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:34,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:34,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:33:34,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:34,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:34,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:34,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:34,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:34,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:34,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:34,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:34,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:34,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:34,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:34,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:34,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:35,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451773933] [2020-10-28 14:33:35,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:35,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:35,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418486370] [2020-10-28 14:33:35,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:35,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:35,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:35,005 INFO L87 Difference]: Start difference. First operand 224 states and 257 transitions. Second operand 16 states. [2020-10-28 14:33:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:36,684 INFO L93 Difference]: Finished difference Result 287 states and 334 transitions. [2020-10-28 14:33:36,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:33:36,685 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-28 14:33:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:36,686 INFO L225 Difference]: With dead ends: 287 [2020-10-28 14:33:36,686 INFO L226 Difference]: Without dead ends: 274 [2020-10-28 14:33:36,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:33:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-28 14:33:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 235. [2020-10-28 14:33:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-28 14:33:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 269 transitions. [2020-10-28 14:33:36,719 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 269 transitions. Word has length 44 [2020-10-28 14:33:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:36,720 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 269 transitions. [2020-10-28 14:33:36,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 269 transitions. [2020-10-28 14:33:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:36,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:36,721 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, 1, 1] [2020-10-28 14:33:36,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-28 14:33:36,721 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1667150508, now seen corresponding path program 19 times [2020-10-28 14:33:36,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:36,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681997374] [2020-10-28 14:33:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:36,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:37,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:37,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:37,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:37,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-28 14:33:37,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:37,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:33:37,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:38,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:38,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:38,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:38,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:38,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:38,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:38,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:38,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:38,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681997374] [2020-10-28 14:33:38,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:38,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:38,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719922722] [2020-10-28 14:33:38,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:38,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:38,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:38,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:38,325 INFO L87 Difference]: Start difference. First operand 235 states and 269 transitions. Second operand 16 states. [2020-10-28 14:33:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:39,997 INFO L93 Difference]: Finished difference Result 277 states and 320 transitions. [2020-10-28 14:33:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:33:39,998 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-28 14:33:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:40,000 INFO L225 Difference]: With dead ends: 277 [2020-10-28 14:33:40,000 INFO L226 Difference]: Without dead ends: 273 [2020-10-28 14:33:40,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:33:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-28 14:33:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 235. [2020-10-28 14:33:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-28 14:33:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 269 transitions. [2020-10-28 14:33:40,030 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 269 transitions. Word has length 44 [2020-10-28 14:33:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:40,031 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 269 transitions. [2020-10-28 14:33:40,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 269 transitions. [2020-10-28 14:33:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:40,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:40,032 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-10-28 14:33:40,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-28 14:33:40,032 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash 344231530, now seen corresponding path program 20 times [2020-10-28 14:33:40,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:40,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061062524] [2020-10-28 14:33:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:40,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:41,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:41,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:41,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:41,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1253 [2020-10-28 14:33:41,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:41,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:33:41,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:41,795 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 14:33:42,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:42,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:42,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:42,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:42,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:42,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:42,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:42,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:42,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061062524] [2020-10-28 14:33:42,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:42,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:33:42,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819293929] [2020-10-28 14:33:42,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:33:42,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:42,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:33:42,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:42,320 INFO L87 Difference]: Start difference. First operand 235 states and 269 transitions. Second operand 16 states. [2020-10-28 14:33:42,829 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-28 14:33:43,143 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-28 14:33:43,487 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-28 14:33:43,769 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-28 14:33:43,974 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-28 14:33:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:44,791 INFO L93 Difference]: Finished difference Result 302 states and 349 transitions. [2020-10-28 14:33:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:33:44,791 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-28 14:33:44,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:44,794 INFO L225 Difference]: With dead ends: 302 [2020-10-28 14:33:44,794 INFO L226 Difference]: Without dead ends: 284 [2020-10-28 14:33:44,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:33:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-28 14:33:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2020-10-28 14:33:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-28 14:33:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 252 transitions. [2020-10-28 14:33:44,822 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 252 transitions. Word has length 44 [2020-10-28 14:33:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:44,823 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 252 transitions. [2020-10-28 14:33:44,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:33:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 252 transitions. [2020-10-28 14:33:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:44,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:44,824 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-10-28 14:33:44,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-28 14:33:44,824 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 22251302, now seen corresponding path program 21 times [2020-10-28 14:33:44,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:44,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476722304] [2020-10-28 14:33:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:44,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:46,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:46,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1467 [2020-10-28 14:33:46,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:46,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:46,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:33:46,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:47,102 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-28 14:33:47,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:47,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:47,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:47,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476722304] [2020-10-28 14:33:47,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:47,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:33:47,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172674404] [2020-10-28 14:33:47,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:33:47,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:47,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:33:47,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:47,519 INFO L87 Difference]: Start difference. First operand 221 states and 252 transitions. Second operand 17 states. [2020-10-28 14:33:48,089 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-28 14:33:48,386 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 14:33:48,589 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-28 14:33:48,935 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-28 14:33:49,151 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-10-28 14:33:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:50,056 INFO L93 Difference]: Finished difference Result 306 states and 351 transitions. [2020-10-28 14:33:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:33:50,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:33:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:50,059 INFO L225 Difference]: With dead ends: 306 [2020-10-28 14:33:50,059 INFO L226 Difference]: Without dead ends: 288 [2020-10-28 14:33:50,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:33:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-28 14:33:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 222. [2020-10-28 14:33:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 14:33:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 252 transitions. [2020-10-28 14:33:50,090 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 252 transitions. Word has length 44 [2020-10-28 14:33:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:50,091 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 252 transitions. [2020-10-28 14:33:50,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:33:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 252 transitions. [2020-10-28 14:33:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:50,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:50,092 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:50,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-28 14:33:50,092 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:50,092 INFO L82 PathProgramCache]: Analyzing trace with hash 66812728, now seen corresponding path program 15 times [2020-10-28 14:33:50,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:50,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809417417] [2020-10-28 14:33:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:50,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:52,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:52,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:52,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2054 [2020-10-28 14:33:52,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:52,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:33:52,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:52,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:52,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:52,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:52,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:52,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:52,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:52,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:52,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809417417] [2020-10-28 14:33:52,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:52,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:33:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719864502] [2020-10-28 14:33:52,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:33:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:33:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:33:52,932 INFO L87 Difference]: Start difference. First operand 222 states and 252 transitions. Second operand 17 states. [2020-10-28 14:33:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:54,873 INFO L93 Difference]: Finished difference Result 367 states and 419 transitions. [2020-10-28 14:33:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:33:54,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:33:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:54,876 INFO L225 Difference]: With dead ends: 367 [2020-10-28 14:33:54,876 INFO L226 Difference]: Without dead ends: 354 [2020-10-28 14:33:54,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:33:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-28 14:33:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 330. [2020-10-28 14:33:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-28 14:33:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 375 transitions. [2020-10-28 14:33:54,925 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 375 transitions. Word has length 44 [2020-10-28 14:33:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:54,926 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 375 transitions. [2020-10-28 14:33:54,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:33:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 375 transitions. [2020-10-28 14:33:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:54,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:54,926 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, 1, 1] [2020-10-28 14:33:54,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-28 14:33:54,927 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:54,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2084149548, now seen corresponding path program 22 times [2020-10-28 14:33:54,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:54,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33947350] [2020-10-28 14:33:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:54,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:59,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:59,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:59,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 14:33:59,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:59,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:59,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:59,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:59,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:33:59,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:00,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:00,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:00,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:00,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:00,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:00,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:00,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:00,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:00,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:00,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33947350] [2020-10-28 14:34:00,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:00,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:34:00,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845772561] [2020-10-28 14:34:00,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:34:00,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:00,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:34:00,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:00,575 INFO L87 Difference]: Start difference. First operand 330 states and 375 transitions. Second operand 17 states. [2020-10-28 14:34:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:02,630 INFO L93 Difference]: Finished difference Result 369 states and 422 transitions. [2020-10-28 14:34:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:34:02,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:34:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:02,632 INFO L225 Difference]: With dead ends: 369 [2020-10-28 14:34:02,632 INFO L226 Difference]: Without dead ends: 365 [2020-10-28 14:34:02,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:34:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-28 14:34:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 269. [2020-10-28 14:34:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-28 14:34:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 308 transitions. [2020-10-28 14:34:02,676 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 308 transitions. Word has length 44 [2020-10-28 14:34:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:02,677 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 308 transitions. [2020-10-28 14:34:02,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:34:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 308 transitions. [2020-10-28 14:34:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:34:02,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:02,678 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:02,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-28 14:34:02,678 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:02,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:02,678 INFO L82 PathProgramCache]: Analyzing trace with hash 89444982, now seen corresponding path program 9 times [2020-10-28 14:34:02,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:02,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523959597] [2020-10-28 14:34:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:02,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2575 [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:34:05,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:05,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:05,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:05,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:05,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:05,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:05,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:34:05,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:05,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:05,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:05,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:05,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:05,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:05,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523959597] [2020-10-28 14:34:05,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:05,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:34:05,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986989228] [2020-10-28 14:34:05,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:34:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:34:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:05,825 INFO L87 Difference]: Start difference. First operand 269 states and 308 transitions. Second operand 17 states. [2020-10-28 14:34:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:08,452 INFO L93 Difference]: Finished difference Result 416 states and 477 transitions. [2020-10-28 14:34:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:34:08,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:34:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:08,454 INFO L225 Difference]: With dead ends: 416 [2020-10-28 14:34:08,454 INFO L226 Difference]: Without dead ends: 412 [2020-10-28 14:34:08,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:34:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-28 14:34:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 367. [2020-10-28 14:34:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-28 14:34:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 416 transitions. [2020-10-28 14:34:08,523 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 416 transitions. Word has length 44 [2020-10-28 14:34:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:08,524 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 416 transitions. [2020-10-28 14:34:08,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:34:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 416 transitions. [2020-10-28 14:34:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:34:08,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:08,525 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:08,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-28 14:34:08,525 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:08,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:08,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2061517294, now seen corresponding path program 6 times [2020-10-28 14:34:08,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:08,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200483325] [2020-10-28 14:34:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:08,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:08,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:09,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:11,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:11,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:34:11,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:11,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3180 [2020-10-28 14:34:11,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:11,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:11,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:11,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:11,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:34:11,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:12,133 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-28 14:34:12,267 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-28 14:34:12,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:12,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:12,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:12,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:12,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:12,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:12,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:12,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:12,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:12,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200483325] [2020-10-28 14:34:12,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:12,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:34:12,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931034154] [2020-10-28 14:34:12,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:34:12,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:12,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:34:12,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:12,619 INFO L87 Difference]: Start difference. First operand 367 states and 416 transitions. Second operand 16 states. [2020-10-28 14:34:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:14,400 INFO L93 Difference]: Finished difference Result 446 states and 512 transitions. [2020-10-28 14:34:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:34:14,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-28 14:34:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:14,403 INFO L225 Difference]: With dead ends: 446 [2020-10-28 14:34:14,403 INFO L226 Difference]: Without dead ends: 428 [2020-10-28 14:34:14,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:34:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-28 14:34:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 341. [2020-10-28 14:34:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-28 14:34:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 387 transitions. [2020-10-28 14:34:14,465 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 387 transitions. Word has length 44 [2020-10-28 14:34:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:14,466 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 387 transitions. [2020-10-28 14:34:14,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:34:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 387 transitions. [2020-10-28 14:34:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:34:14,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:14,467 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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 14:34:14,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-28 14:34:14,467 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -842715041, now seen corresponding path program 23 times [2020-10-28 14:34:14,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:14,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61214495] [2020-10-28 14:34:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:16,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:16,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:34:16,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1498 [2020-10-28 14:34:16,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:16,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:16,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:34:16,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:16,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:34:16,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:16,457 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-28 14:34:16,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:16,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:16,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:16,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:16,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:16,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:34:16,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:16,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:16,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:16,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:16,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:16,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:16,908 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 14:34:16,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61214495] [2020-10-28 14:34:16,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:16,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:34:16,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405694553] [2020-10-28 14:34:16,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:34:16,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:34:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:16,910 INFO L87 Difference]: Start difference. First operand 341 states and 387 transitions. Second operand 17 states. [2020-10-28 14:34:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:18,738 INFO L93 Difference]: Finished difference Result 547 states and 617 transitions. [2020-10-28 14:34:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:34:18,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-10-28 14:34:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:18,742 INFO L225 Difference]: With dead ends: 547 [2020-10-28 14:34:18,742 INFO L226 Difference]: Without dead ends: 529 [2020-10-28 14:34:18,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:34:18,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-10-28 14:34:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 405. [2020-10-28 14:34:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-28 14:34:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 460 transitions. [2020-10-28 14:34:18,810 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 460 transitions. Word has length 47 [2020-10-28 14:34:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:18,811 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 460 transitions. [2020-10-28 14:34:18,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:34:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 460 transitions. [2020-10-28 14:34:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:34:18,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:18,812 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:18,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-28 14:34:18,812 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash -780319139, now seen corresponding path program 16 times [2020-10-28 14:34:18,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:18,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31861254] [2020-10-28 14:34:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:18,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3918 [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:34:22,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:23,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:23,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:23,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:23,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:23,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:23,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:23,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:23,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:23,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31861254] [2020-10-28 14:34:23,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:23,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:34:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446517103] [2020-10-28 14:34:23,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:34:23,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:34:23,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:23,250 INFO L87 Difference]: Start difference. First operand 405 states and 460 transitions. Second operand 16 states. [2020-10-28 14:34:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:25,012 INFO L93 Difference]: Finished difference Result 449 states and 508 transitions. [2020-10-28 14:34:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:34:25,013 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-28 14:34:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:25,015 INFO L225 Difference]: With dead ends: 449 [2020-10-28 14:34:25,015 INFO L226 Difference]: Without dead ends: 371 [2020-10-28 14:34:25,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:34:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-10-28 14:34:25,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2020-10-28 14:34:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-28 14:34:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 422 transitions. [2020-10-28 14:34:25,075 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 422 transitions. Word has length 47 [2020-10-28 14:34:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:25,075 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 422 transitions. [2020-10-28 14:34:25,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:34:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 422 transitions. [2020-10-28 14:34:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:34:25,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:25,076 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:25,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-28 14:34:25,077 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1213228423, now seen corresponding path program 17 times [2020-10-28 14:34:25,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:25,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223712599] [2020-10-28 14:34:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:25,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:25,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:25,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:26,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:34:30,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:30,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:30,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:30,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:30,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223712599] [2020-10-28 14:34:30,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:30,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:34:30,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365349157] [2020-10-28 14:34:30,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:34:30,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:30,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:34:30,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:30,753 INFO L87 Difference]: Start difference. First operand 371 states and 422 transitions. Second operand 18 states. [2020-10-28 14:34:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:33,579 INFO L93 Difference]: Finished difference Result 652 states and 738 transitions. [2020-10-28 14:34:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:34:33,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-28 14:34:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:33,582 INFO L225 Difference]: With dead ends: 652 [2020-10-28 14:34:33,582 INFO L226 Difference]: Without dead ends: 648 [2020-10-28 14:34:33,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:34:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-10-28 14:34:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 440. [2020-10-28 14:34:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-10-28 14:34:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 505 transitions. [2020-10-28 14:34:33,642 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 505 transitions. Word has length 47 [2020-10-28 14:34:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:33,642 INFO L481 AbstractCegarLoop]: Abstraction has 440 states and 505 transitions. [2020-10-28 14:34:33,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:34:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 505 transitions. [2020-10-28 14:34:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:34:33,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:33,643 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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 14:34:33,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-28 14:34:33,644 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:33,644 INFO L82 PathProgramCache]: Analyzing trace with hash -937733853, now seen corresponding path program 24 times [2020-10-28 14:34:33,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:33,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382900845] [2020-10-28 14:34:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:33,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:33,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:35,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:35,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:34:35,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:35,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1513 [2020-10-28 14:34:35,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:35,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:35,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:34:35,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:35,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:34:35,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:35,536 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-28 14:34:35,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:35,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:35,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:35,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:35,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:35,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:35,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:35,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:35,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:35,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:35,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:35,959 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 14:34:35,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382900845] [2020-10-28 14:34:35,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:35,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:34:35,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970527804] [2020-10-28 14:34:35,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:34:35,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:35,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:34:35,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:35,960 INFO L87 Difference]: Start difference. First operand 440 states and 505 transitions. Second operand 18 states. [2020-10-28 14:34:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:38,231 INFO L93 Difference]: Finished difference Result 501 states and 572 transitions. [2020-10-28 14:34:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:34:38,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-28 14:34:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:38,234 INFO L225 Difference]: With dead ends: 501 [2020-10-28 14:34:38,235 INFO L226 Difference]: Without dead ends: 497 [2020-10-28 14:34:38,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:34:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-28 14:34:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 440. [2020-10-28 14:34:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-10-28 14:34:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 505 transitions. [2020-10-28 14:34:38,297 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 505 transitions. Word has length 47 [2020-10-28 14:34:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:38,297 INFO L481 AbstractCegarLoop]: Abstraction has 440 states and 505 transitions. [2020-10-28 14:34:38,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:34:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 505 transitions. [2020-10-28 14:34:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:34:38,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:38,298 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] [2020-10-28 14:34:38,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-28 14:34:38,298 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:38,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1235860677, now seen corresponding path program 18 times [2020-10-28 14:34:38,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:38,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320346727] [2020-10-28 14:34:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:38,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:43,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:43,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:34:43,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:43,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:34:43,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:43,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:34:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:34:43,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:43,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:44,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:44,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:44,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:44,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:44,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:44,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:44,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:44,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:44,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:44,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:44,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320346727] [2020-10-28 14:34:44,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:44,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:34:44,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255589153] [2020-10-28 14:34:44,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:34:44,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:44,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:34:44,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:44,024 INFO L87 Difference]: Start difference. First operand 440 states and 505 transitions. Second operand 18 states. [2020-10-28 14:34:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:47,040 INFO L93 Difference]: Finished difference Result 553 states and 630 transitions. [2020-10-28 14:34:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:34:47,040 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-28 14:34:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:47,042 INFO L225 Difference]: With dead ends: 553 [2020-10-28 14:34:47,042 INFO L226 Difference]: Without dead ends: 549 [2020-10-28 14:34:47,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:34:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-28 14:34:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 411. [2020-10-28 14:34:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-28 14:34:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 467 transitions. [2020-10-28 14:34:47,123 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 467 transitions. Word has length 47 [2020-10-28 14:34:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:47,123 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 467 transitions. [2020-10-28 14:34:47,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:34:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 467 transitions. [2020-10-28 14:34:47,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:34:47,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:47,124 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 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 14:34:47,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-28 14:34:47,124 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash -915101599, now seen corresponding path program 25 times [2020-10-28 14:34:47,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:47,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493201070] [2020-10-28 14:34:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:47,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:49,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:49,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:34:49,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:49,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2064 [2020-10-28 14:34:49,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:49,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:49,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:34:49,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:34:49,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:49,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:49,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:49,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:49,980 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 14:34:49,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493201070] [2020-10-28 14:34:49,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:49,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:34:49,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073299773] [2020-10-28 14:34:49,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:34:49,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:49,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:34:49,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:49,981 INFO L87 Difference]: Start difference. First operand 411 states and 467 transitions. Second operand 18 states. [2020-10-28 14:34:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:52,245 INFO L93 Difference]: Finished difference Result 499 states and 568 transitions. [2020-10-28 14:34:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:34:52,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-28 14:34:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:52,249 INFO L225 Difference]: With dead ends: 499 [2020-10-28 14:34:52,249 INFO L226 Difference]: Without dead ends: 495 [2020-10-28 14:34:52,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:34:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-28 14:34:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2020-10-28 14:34:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-28 14:34:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 467 transitions. [2020-10-28 14:34:52,308 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 467 transitions. Word has length 47 [2020-10-28 14:34:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:52,308 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 467 transitions. [2020-10-28 14:34:52,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:34:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 467 transitions. [2020-10-28 14:34:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:34:52,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:52,310 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:52,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-28 14:34:52,310 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:52,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1741667549, now seen corresponding path program 19 times [2020-10-28 14:34:52,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:52,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878362860] [2020-10-28 14:34:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:52,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:54,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:34:54,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:54,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1716 [2020-10-28 14:34:54,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:54,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:34:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:34:54,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:54,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:54,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:54,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:54,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:54,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:54,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:54,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:54,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:54,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:54,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:54,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:54,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878362860] [2020-10-28 14:34:54,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:54,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:34:54,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775589326] [2020-10-28 14:34:54,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:34:54,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:34:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:54,613 INFO L87 Difference]: Start difference. First operand 411 states and 467 transitions. Second operand 17 states. [2020-10-28 14:34:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:56,466 INFO L93 Difference]: Finished difference Result 426 states and 484 transitions. [2020-10-28 14:34:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:34:56,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-10-28 14:34:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:56,468 INFO L225 Difference]: With dead ends: 426 [2020-10-28 14:34:56,468 INFO L226 Difference]: Without dead ends: 315 [2020-10-28 14:34:56,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:34:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-28 14:34:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2020-10-28 14:34:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-28 14:34:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 362 transitions. [2020-10-28 14:34:56,544 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 362 transitions. Word has length 47 [2020-10-28 14:34:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:56,544 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 362 transitions. [2020-10-28 14:34:56,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:34:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 362 transitions. [2020-10-28 14:34:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:34:56,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:56,545 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:56,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-28 14:34:56,545 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:56,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1669280991, now seen corresponding path program 10 times [2020-10-28 14:34:56,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:56,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753308956] [2020-10-28 14:34:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:01,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:01,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:35:01,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:35:01,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 14:35:01,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:01,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:01,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:35:01,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:01,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:35:01,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:02,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:02,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:02,522 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 14:35:02,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753308956] [2020-10-28 14:35:02,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:02,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:35:02,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726898961] [2020-10-28 14:35:02,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:35:02,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:02,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:35:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:35:02,523 INFO L87 Difference]: Start difference. First operand 315 states and 362 transitions. Second operand 18 states.