/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:06:41,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:06:41,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:06:41,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:06:41,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:06:41,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:06:41,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:06:41,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:06:41,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:06:41,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:06:41,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:06:41,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:06:41,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:06:41,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:06:41,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:06:41,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:06:41,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:06:41,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:06:41,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:06:41,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:06:41,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:06:41,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:06:41,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:06:41,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:06:41,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:06:41,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:06:41,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:06:41,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:06:41,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:06:41,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:06:41,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:06:41,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:06:41,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:06:41,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:06:41,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:06:41,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:06:41,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:06:41,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:06:41,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:06:41,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:06:41,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:06:41,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:06:41,413 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:06:41,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:06:41,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:06:41,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:06:41,415 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:06:41,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:06:41,416 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:06:41,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:06:41,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:06:41,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:06:41,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:06:41,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:06:41,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:06:41,418 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:06:41,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:06:41,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:06:41,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:06:41,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:06:41,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:06:41,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:06:41,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:06:41,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:06:41,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:06:41,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:06:41,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:06:41,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:06:41,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:06:41,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:06:41,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:06:41,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:06:41,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:06:41,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:06:41,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:06:41,861 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:06:41,862 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:06:41,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-1.i [2020-10-27 01:06:41,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7d823e9a/46703ceab6b04f87addaea893f9dea69/FLAGe853822c6 [2020-10-27 01:06:42,542 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:06:42,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-1.i [2020-10-27 01:06:42,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7d823e9a/46703ceab6b04f87addaea893f9dea69/FLAGe853822c6 [2020-10-27 01:06:42,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7d823e9a/46703ceab6b04f87addaea893f9dea69 [2020-10-27 01:06:42,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:06:42,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:06:42,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:06:42,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:06:42,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:06:42,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:06:42" (1/1) ... [2020-10-27 01:06:42,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f28056b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:42, skipping insertion in model container [2020-10-27 01:06:42,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:06:42" (1/1) ... [2020-10-27 01:06:42,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:06:42,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:06:43,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:06:43,252 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:06:43,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:06:43,418 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:06:43,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43 WrapperNode [2020-10-27 01:06:43,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:06:43,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:06:43,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:06:43,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:06:43,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43" (1/1) ... [2020-10-27 01:06:43,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43" (1/1) ... [2020-10-27 01:06:43,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43" (1/1) ... [2020-10-27 01:06:43,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43" (1/1) ... [2020-10-27 01:06:43,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43" (1/1) ... [2020-10-27 01:06:43,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43" (1/1) ... [2020-10-27 01:06:43,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43" (1/1) ... [2020-10-27 01:06:43,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:06:43,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:06:43,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:06:43,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:06:43,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:06:43,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:06:43,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:06:43,638 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:06:43,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:06:43,638 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:06:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:06:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:06:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:06:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:06:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:06:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:06:43,640 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:06:43,640 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:06:43,640 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:06:43,640 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:06:43,640 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:06:43,640 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:06:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:06:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:06:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:06:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:06:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:06:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:06:43,642 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:06:43,642 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:06:43,642 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:06:43,642 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:06:43,642 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:06:43,642 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:06:43,643 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:06:43,643 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:06:43,643 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:06:43,643 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:06:43,643 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:06:43,643 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:06:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:06:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:06:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:06:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:06:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:06:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:06:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:06:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:06:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:06:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:06:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:06:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:06:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:06:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:06:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:06:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:06:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:06:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:06:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:06:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:06:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:06:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:06:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:06:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:06:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:06:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:06:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:06:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:06:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:06:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:06:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:06:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:06:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:06:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:06:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:06:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:06:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:06:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:06:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:06:43,655 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:06:43,655 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:06:43,655 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:06:43,655 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:06:43,655 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:06:43,655 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:06:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:06:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:06:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:06:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:06:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:06:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:06:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:06:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:06:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:06:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:06:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:06:43,659 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:06:43,659 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:06:43,659 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:06:43,659 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:06:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:06:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:06:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:06:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:06:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:06:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:06:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:06:43,661 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:06:43,661 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:06:43,661 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:06:43,661 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:06:43,661 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:06:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:06:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:06:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:06:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:06:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:06:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:06:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:06:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:06:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:06:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:06:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:06:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:06:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:06:43,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:06:43,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:06:43,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:06:44,258 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:06:44,259 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 01:06:44,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:06:44 BoogieIcfgContainer [2020-10-27 01:06:44,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:06:44,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:06:44,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:06:44,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:06:44,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:06:42" (1/3) ... [2020-10-27 01:06:44,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ec29af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:06:44, skipping insertion in model container [2020-10-27 01:06:44,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:43" (2/3) ... [2020-10-27 01:06:44,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ec29af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:06:44, skipping insertion in model container [2020-10-27 01:06:44,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:06:44" (3/3) ... [2020-10-27 01:06:44,269 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-1.i [2020-10-27 01:06:44,281 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:06:44,286 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:06:44,299 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:06:44,325 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:06:44,325 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:06:44,326 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:06:44,326 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:06:44,326 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:06:44,326 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:06:44,326 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:06:44,326 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:06:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-27 01:06:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:06:44,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:44,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:44,350 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash -630579744, now seen corresponding path program 1 times [2020-10-27 01:06:44,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:44,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862835015] [2020-10-27 01:06:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:44,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:44,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:44,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:44,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 01:06:44,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:44,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-27 01:06:44,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:44,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:06:44,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:44,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:06:44,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:06:45,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:45,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:45,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:45,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:45,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:06:45,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:45,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:45,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:45,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862835015] [2020-10-27 01:06:45,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:45,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:06:45,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351121037] [2020-10-27 01:06:45,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:06:45,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:45,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:06:45,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:06:45,062 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 5 states. [2020-10-27 01:06:45,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:45,268 INFO L93 Difference]: Finished difference Result 78 states and 131 transitions. [2020-10-27 01:06:45,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:06:45,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-27 01:06:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:45,279 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:06:45,280 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:06:45,283 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 [2020-10-27 01:06:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:06:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-27 01:06:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:06:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-27 01:06:45,325 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 12 [2020-10-27 01:06:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:45,326 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-27 01:06:45,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:06:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-27 01:06:45,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:06:45,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:45,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:45,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:06:45,328 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1882684930, now seen corresponding path program 1 times [2020-10-27 01:06:45,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:45,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526194785] [2020-10-27 01:06:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:45,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:45,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:45,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:06:45,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:45,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 01:06:45,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:45,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:06:45,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:45,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:06:45,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:45,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:45,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:45,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:45,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:45,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:06:45,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:45,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:45,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:45,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:45,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526194785] [2020-10-27 01:06:45,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:45,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:06:45,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806946035] [2020-10-27 01:06:45,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:06:45,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:45,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:06:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:06:45,549 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-27 01:06:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:45,727 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-27 01:06:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:45,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:06:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:45,729 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:06:45,729 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:06:45,730 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 [2020-10-27 01:06:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:06:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-10-27 01:06:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:06:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-27 01:06:45,740 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2020-10-27 01:06:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:45,740 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-27 01:06:45,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:06:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-27 01:06:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:06:45,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:45,742 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:45,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:06:45,742 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash -922245935, now seen corresponding path program 1 times [2020-10-27 01:06:45,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:45,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281816057] [2020-10-27 01:06:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:45,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:46,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:06:46,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:46,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-27 01:06:46,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:46,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:06:46,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:46,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:06:46,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:46,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:46,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:46,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:46,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:46,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:06:46,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:46,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:46,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:46,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:46,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:46,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281816057] [2020-10-27 01:06:46,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:46,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:46,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418109509] [2020-10-27 01:06:46,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:46,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:46,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:46,291 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 8 states. [2020-10-27 01:06:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:46,658 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-10-27 01:06:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:46,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 01:06:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:46,660 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:06:46,661 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:06:46,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:06:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2020-10-27 01:06:46,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:06:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-27 01:06:46,669 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 19 [2020-10-27 01:06:46,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:46,670 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-27 01:06:46,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:46,670 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-27 01:06:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:06:46,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:46,671 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:46,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:06:46,671 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:46,672 INFO L82 PathProgramCache]: Analyzing trace with hash -221181357, now seen corresponding path program 1 times [2020-10-27 01:06:46,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:46,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372932803] [2020-10-27 01:06:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:46,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:46,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:06:46,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:46,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-27 01:06:46,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:06:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:06:46,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:47,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:47,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:47,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:47,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:47,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:47,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:47,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:47,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:47,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:47,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:47,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372932803] [2020-10-27 01:06:47,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:47,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:47,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151185207] [2020-10-27 01:06:47,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:47,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:47,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:47,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:47,125 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 8 states. [2020-10-27 01:06:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:47,419 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-27 01:06:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:47,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 01:06:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:47,420 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:06:47,420 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:06:47,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:06:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2020-10-27 01:06:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:06:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 01:06:47,427 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2020-10-27 01:06:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:47,428 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 01:06:47,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 01:06:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:06:47,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:47,429 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] [2020-10-27 01:06:47,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:06:47,429 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:47,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1654214030, now seen corresponding path program 1 times [2020-10-27 01:06:47,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:47,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781866429] [2020-10-27 01:06:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:47,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:47,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:06:47,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:47,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-27 01:06:47,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:47,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:06:47,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:47,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:06:47,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:47,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:47,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:47,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:47,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:47,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:06:47,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:47,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781866429] [2020-10-27 01:06:47,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:47,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:06:47,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803622269] [2020-10-27 01:06:47,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:06:47,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:06:47,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:06:47,827 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-27 01:06:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:48,020 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-27 01:06:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:48,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-27 01:06:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:48,022 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:06:48,022 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:06:48,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:06:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-27 01:06:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:06:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-27 01:06:48,030 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 20 [2020-10-27 01:06:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:48,031 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-27 01:06:48,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:06:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-27 01:06:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:06:48,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:48,032 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] [2020-10-27 01:06:48,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:06:48,032 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:48,033 INFO L82 PathProgramCache]: Analyzing trace with hash 128959175, now seen corresponding path program 1 times [2020-10-27 01:06:48,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:48,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762020842] [2020-10-27 01:06:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:48,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:06:48,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:48,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 01:06:48,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:48,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:06:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:06:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:48,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:48,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:48,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:48,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:48,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:48,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:48,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762020842] [2020-10-27 01:06:48,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:48,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:06:48,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422403746] [2020-10-27 01:06:48,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:06:48,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:48,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:06:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:06:48,344 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2020-10-27 01:06:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:48,521 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-27 01:06:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:48,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 01:06:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:48,523 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:06:48,523 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:06:48,524 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 [2020-10-27 01:06:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:06:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:06:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:06:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-27 01:06:48,532 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 23 [2020-10-27 01:06:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:48,532 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-27 01:06:48,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:06:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-27 01:06:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:06:48,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:48,533 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] [2020-10-27 01:06:48,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:06:48,534 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1442690721, now seen corresponding path program 1 times [2020-10-27 01:06:48,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:48,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563230230] [2020-10-27 01:06:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:48,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:49,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:49,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:06:49,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:49,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-27 01:06:49,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:49,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:06:49,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:49,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:06:49,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:49,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:49,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:49,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:49,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:49,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:49,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:06:49,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:49,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:49,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:49,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:49,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:49,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563230230] [2020-10-27 01:06:49,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:49,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:49,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984754105] [2020-10-27 01:06:49,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:49,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:49,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:49,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:49,648 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-27 01:06:50,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:50,005 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-27 01:06:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:50,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 01:06:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:50,007 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:06:50,007 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:06:50,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:06:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2020-10-27 01:06:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:06:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-27 01:06:50,023 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2020-10-27 01:06:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:50,024 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-27 01:06:50,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:50,024 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-27 01:06:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:06:50,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:50,026 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] [2020-10-27 01:06:50,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:06:50,026 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:50,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:50,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1868815080, now seen corresponding path program 1 times [2020-10-27 01:06:50,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:50,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788747832] [2020-10-27 01:06:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:50,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:50,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:50,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:06:50,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:50,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-27 01:06:50,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:50,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:50,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:50,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:06:50,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:06:50,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:50,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:50,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:50,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:50,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:50,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:50,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:50,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:50,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:50,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:50,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:50,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788747832] [2020-10-27 01:06:50,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:50,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:50,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911325282] [2020-10-27 01:06:50,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:50,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:50,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:50,572 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 9 states. [2020-10-27 01:06:50,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:50,972 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-27 01:06:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:50,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:06:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:50,974 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:06:50,974 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:06:50,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:06:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2020-10-27 01:06:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:06:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-27 01:06:50,983 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 26 [2020-10-27 01:06:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:50,983 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-27 01:06:50,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-27 01:06:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:06:50,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:50,985 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:50,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:06:50,985 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:50,986 INFO L82 PathProgramCache]: Analyzing trace with hash 854502320, now seen corresponding path program 1 times [2020-10-27 01:06:50,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:50,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807534238] [2020-10-27 01:06:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:51,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:51,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:51,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:51,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:51,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:06:51,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:51,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-10-27 01:06:51,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:06:51,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:52,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:52,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:52,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:52,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:52,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:52,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:06:52,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:52,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:52,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:52,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:52,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:52,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807534238] [2020-10-27 01:06:52,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:52,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:52,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977463948] [2020-10-27 01:06:52,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:52,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:52,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:52,289 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 9 states. [2020-10-27 01:06:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:52,568 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-27 01:06:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:52,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:06:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:52,570 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:06:52,570 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:06:52,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:06:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-10-27 01:06:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:06:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-27 01:06:52,580 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 26 [2020-10-27 01:06:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:52,580 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-27 01:06:52,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-27 01:06:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:06:52,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:52,584 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] [2020-10-27 01:06:52,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:06:52,584 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:52,585 INFO L82 PathProgramCache]: Analyzing trace with hash 432007510, now seen corresponding path program 1 times [2020-10-27 01:06:52,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:52,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114478463] [2020-10-27 01:06:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:52,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:52,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:52,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:06:52,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:52,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-27 01:06:52,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:06:52,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:53,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:53,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:53,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:53,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:53,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:53,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:53,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:53,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:53,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:53,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114478463] [2020-10-27 01:06:53,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:53,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:53,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430576778] [2020-10-27 01:06:53,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:53,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:53,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:53,057 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2020-10-27 01:06:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:53,543 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2020-10-27 01:06:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:53,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:06:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:53,544 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:06:53,545 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 01:06:53,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:06:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 01:06:53,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2020-10-27 01:06:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:06:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-27 01:06:53,567 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 26 [2020-10-27 01:06:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:53,567 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-27 01:06:53,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-27 01:06:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:06:53,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:53,568 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:53,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:06:53,569 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:53,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1684555517, now seen corresponding path program 2 times [2020-10-27 01:06:53,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:53,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267075648] [2020-10-27 01:06:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:53,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:53,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:06:53,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:53,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-27 01:06:53,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:53,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:53,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:53,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:06:53,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:54,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:54,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:54,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:54,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:54,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:54,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:54,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:54,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:54,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:54,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267075648] [2020-10-27 01:06:54,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:54,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:54,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043266299] [2020-10-27 01:06:54,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:54,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:54,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:54,098 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 9 states. [2020-10-27 01:06:54,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:54,409 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-10-27 01:06:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:54,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 01:06:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:54,411 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:06:54,411 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:06:54,412 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 [2020-10-27 01:06:54,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:06:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:06:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:06:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-27 01:06:54,420 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 29 [2020-10-27 01:06:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:54,420 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-27 01:06:54,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-27 01:06:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:06:54,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:54,421 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:54,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:06:54,422 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:54,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2095142183, now seen corresponding path program 3 times [2020-10-27 01:06:54,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:54,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234439965] [2020-10-27 01:06:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:54,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:54,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:06:54,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:54,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-27 01:06:54,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:54,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:54,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:54,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:06:54,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:06:55,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:55,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:55,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:55,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:55,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:55,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:55,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:55,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:55,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234439965] [2020-10-27 01:06:55,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:55,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:55,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004754390] [2020-10-27 01:06:55,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:55,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:55,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:55,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:55,468 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 11 states. [2020-10-27 01:06:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:56,100 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2020-10-27 01:06:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:56,101 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:06:56,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:56,102 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:06:56,102 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:06:56,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:06:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:06:56,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-10-27 01:06:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:06:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-27 01:06:56,120 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 29 [2020-10-27 01:06:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:56,120 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-27 01:06:56,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-27 01:06:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:06:56,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:56,122 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] [2020-10-27 01:06:56,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:06:56,122 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:56,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:56,122 INFO L82 PathProgramCache]: Analyzing trace with hash 100997477, now seen corresponding path program 1 times [2020-10-27 01:06:56,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:56,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606799694] [2020-10-27 01:06:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:56,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:56,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:56,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:56,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:06:56,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:56,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-27 01:06:56,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:56,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:56,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:56,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:06:56,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:57,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:57,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:57,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:57,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:57,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:57,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:57,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:57,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:57,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:57,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606799694] [2020-10-27 01:06:57,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:57,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:57,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098870071] [2020-10-27 01:06:57,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:57,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:57,341 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 11 states. [2020-10-27 01:06:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:57,874 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-10-27 01:06:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:57,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:06:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:57,875 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:06:57,875 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 01:06:57,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:06:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 01:06:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-10-27 01:06:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:06:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-27 01:06:57,884 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 29 [2020-10-27 01:06:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:57,884 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-27 01:06:57,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-27 01:06:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:06:57,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:57,885 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:57,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:06:57,885 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:57,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2107257343, now seen corresponding path program 2 times [2020-10-27 01:06:57,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:57,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681334992] [2020-10-27 01:06:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:57,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:58,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:58,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:06:58,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:58,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-27 01:06:58,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:06:58,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:58,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:58,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:58,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:58,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:58,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:58,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:58,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:58,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:58,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:58,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681334992] [2020-10-27 01:06:58,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:58,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:58,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638884493] [2020-10-27 01:06:58,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:58,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:58,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:58,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:58,780 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 10 states. [2020-10-27 01:06:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:59,275 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-10-27 01:06:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:06:59,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 01:06:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:59,278 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:06:59,278 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:06:59,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:06:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:06:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2020-10-27 01:06:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:06:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-27 01:06:59,295 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 29 [2020-10-27 01:06:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:59,295 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-27 01:06:59,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-27 01:06:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:06:59,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:59,296 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] [2020-10-27 01:06:59,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:06:59,297 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash -43704933, now seen corresponding path program 1 times [2020-10-27 01:06:59,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:59,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402547430] [2020-10-27 01:06:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:59,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:59,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:59,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:06:59,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:59,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-27 01:06:59,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:06:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:59,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:59,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:59,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:59,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:59,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:59,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:59,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:59,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402547430] [2020-10-27 01:06:59,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:59,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:59,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386439075] [2020-10-27 01:06:59,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:59,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:59,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:59,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:59,791 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 10 states. [2020-10-27 01:07:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:00,292 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-10-27 01:07:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:00,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 01:07:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:00,294 INFO L225 Difference]: With dead ends: 83 [2020-10-27 01:07:00,294 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:07:00,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:07:00,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-27 01:07:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:07:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-27 01:07:00,307 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 29 [2020-10-27 01:07:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:00,307 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-27 01:07:00,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:07:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-27 01:07:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:07:00,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:00,309 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] [2020-10-27 01:07:00,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:07:00,309 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:00,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1777123287, now seen corresponding path program 2 times [2020-10-27 01:07:00,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:00,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233889676] [2020-10-27 01:07:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:00,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:00,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:07:00,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:00,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-27 01:07:00,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:00,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:07:00,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:00,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:07:00,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:00,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:00,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:00,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:00,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:00,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:00,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:00,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:00,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:00,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:00,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:00,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233889676] [2020-10-27 01:07:00,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:00,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:00,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641580674] [2020-10-27 01:07:00,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:00,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:00,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:00,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:00,910 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 11 states. [2020-10-27 01:07:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:01,400 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-27 01:07:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:07:01,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:07:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:01,401 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:07:01,401 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 01:07:01,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:07:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 01:07:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2020-10-27 01:07:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:07:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-10-27 01:07:01,418 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 29 [2020-10-27 01:07:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:01,418 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-10-27 01:07:01,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-10-27 01:07:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:07:01,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:01,419 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] [2020-10-27 01:07:01,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:07:01,419 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:01,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1809574030, now seen corresponding path program 4 times [2020-10-27 01:07:01,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:01,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379188655] [2020-10-27 01:07:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:01,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:01,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:07:01,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:01,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 01:07:01,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:07:01,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:02,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:02,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:02,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:02,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:02,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:02,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:02,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:02,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379188655] [2020-10-27 01:07:02,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:02,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:02,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120066471] [2020-10-27 01:07:02,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:02,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:02,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:02,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:02,084 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 11 states. [2020-10-27 01:07:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:02,772 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-10-27 01:07:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:02,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:07:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:02,775 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:07:02,775 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:07:02,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:07:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:07:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2020-10-27 01:07:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:07:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-10-27 01:07:02,788 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 32 [2020-10-27 01:07:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:02,790 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-10-27 01:07:02,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:02,790 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-10-27 01:07:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:07:02,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:02,791 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] [2020-10-27 01:07:02,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:07:02,791 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:02,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2062691440, now seen corresponding path program 3 times [2020-10-27 01:07:02,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:02,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895378082] [2020-10-27 01:07:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:03,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:03,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:07:03,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:03,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-27 01:07:03,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:07:03,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:03,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:03,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:03,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:03,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:03,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:03,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:03,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:03,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:03,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:03,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:03,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:03,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895378082] [2020-10-27 01:07:03,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:03,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:03,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847789700] [2020-10-27 01:07:03,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:03,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:03,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:03,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:03,515 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 11 states. [2020-10-27 01:07:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:04,336 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2020-10-27 01:07:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:04,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:07:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:04,341 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:07:04,341 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:07:04,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:07:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:07:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2020-10-27 01:07:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:07:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2020-10-27 01:07:04,359 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 32 [2020-10-27 01:07:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:04,359 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2020-10-27 01:07:04,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2020-10-27 01:07:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:07:04,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:04,360 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] [2020-10-27 01:07:04,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:07:04,360 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1955052726, now seen corresponding path program 3 times [2020-10-27 01:07:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:04,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848331959] [2020-10-27 01:07:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:04,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:04,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:04,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:05,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:07:05,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:05,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1143 [2020-10-27 01:07:05,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:05,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:07:05,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:05,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:07:05,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:05,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:05,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:05,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:05,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:05,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:05,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:05,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:05,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848331959] [2020-10-27 01:07:05,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:05,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:05,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846629832] [2020-10-27 01:07:05,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:05,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:05,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:05,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:05,848 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand 11 states. [2020-10-27 01:07:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:06,739 INFO L93 Difference]: Finished difference Result 124 states and 143 transitions. [2020-10-27 01:07:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:06,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:07:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:06,742 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:07:06,742 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:07:06,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:07:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:07:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2020-10-27 01:07:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:07:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-10-27 01:07:06,754 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 32 [2020-10-27 01:07:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:06,754 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-10-27 01:07:06,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-10-27 01:07:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:07:06,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:06,755 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] [2020-10-27 01:07:06,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:07:06,756 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1675560524, now seen corresponding path program 4 times [2020-10-27 01:07:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:06,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974746903] [2020-10-27 01:07:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:07,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:08,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:08,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:07:08,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:08,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1298 [2020-10-27 01:07:08,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:08,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:08,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:08,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:07:08,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:07:08,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:08,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:08,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:08,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:08,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:08,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:07:08,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:08,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:08,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:08,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:08,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:08,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974746903] [2020-10-27 01:07:08,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:08,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:08,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086338785] [2020-10-27 01:07:08,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:08,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:08,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:08,389 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 12 states. [2020-10-27 01:07:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:09,269 INFO L93 Difference]: Finished difference Result 171 states and 197 transitions. [2020-10-27 01:07:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:07:09,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:07:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:09,272 INFO L225 Difference]: With dead ends: 171 [2020-10-27 01:07:09,272 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 01:07:09,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:07:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 01:07:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 109. [2020-10-27 01:07:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:07:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2020-10-27 01:07:09,283 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 32 [2020-10-27 01:07:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:09,283 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2020-10-27 01:07:09,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2020-10-27 01:07:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:07:09,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:09,284 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] [2020-10-27 01:07:09,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:07:09,284 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash -475401752, now seen corresponding path program 1 times [2020-10-27 01:07:09,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:09,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260567575] [2020-10-27 01:07:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:09,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:09,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:09,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:07:09,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:09,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-27 01:07:09,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:09,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:07:09,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:09,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:09,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:09,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:09,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:09,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:09,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:09,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:09,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:09,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:09,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:09,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:09,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260567575] [2020-10-27 01:07:09,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:09,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:09,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005334457] [2020-10-27 01:07:09,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:09,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:09,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:09,985 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand 12 states. [2020-10-27 01:07:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:10,771 INFO L93 Difference]: Finished difference Result 153 states and 178 transitions. [2020-10-27 01:07:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:07:10,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:07:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:10,773 INFO L225 Difference]: With dead ends: 153 [2020-10-27 01:07:10,773 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 01:07:10,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:07:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 01:07:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2020-10-27 01:07:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:07:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2020-10-27 01:07:10,791 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 32 [2020-10-27 01:07:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:10,792 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2020-10-27 01:07:10,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2020-10-27 01:07:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:07:10,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:10,793 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] [2020-10-27 01:07:10,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:07:10,794 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:10,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2098262350, now seen corresponding path program 4 times [2020-10-27 01:07:10,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:10,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745342159] [2020-10-27 01:07:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:12,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:12,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:07:12,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:12,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-27 01:07:12,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:12,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:12,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:12,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:07:12,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:12,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:12,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:12,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:12,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:12,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:12,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:12,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:12,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:12,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:12,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:12,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:12,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745342159] [2020-10-27 01:07:12,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:12,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:12,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53723556] [2020-10-27 01:07:12,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:12,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:12,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:12,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:12,591 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand 12 states. [2020-10-27 01:07:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:13,533 INFO L93 Difference]: Finished difference Result 190 states and 220 transitions. [2020-10-27 01:07:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:07:13,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:07:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:13,537 INFO L225 Difference]: With dead ends: 190 [2020-10-27 01:07:13,538 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:07:13,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:07:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 126. [2020-10-27 01:07:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:07:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2020-10-27 01:07:13,553 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 32 [2020-10-27 01:07:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:13,553 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2020-10-27 01:07:13,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2020-10-27 01:07:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:07:13,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:13,554 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] [2020-10-27 01:07:13,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:07:13,554 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash -52699926, now seen corresponding path program 2 times [2020-10-27 01:07:13,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:13,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119167051] [2020-10-27 01:07:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:13,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:13,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:13,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:07:13,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:13,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-27 01:07:13,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:07:13,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:14,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:14,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:14,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:14,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:14,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:14,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:14,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:14,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:14,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:14,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:14,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:14,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119167051] [2020-10-27 01:07:14,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:14,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:14,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111395187] [2020-10-27 01:07:14,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:14,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:14,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:14,239 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand 12 states. [2020-10-27 01:07:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:15,019 INFO L93 Difference]: Finished difference Result 157 states and 182 transitions. [2020-10-27 01:07:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:15,019 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:07:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:15,021 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:07:15,021 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 01:07:15,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:07:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 01:07:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2020-10-27 01:07:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:07:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2020-10-27 01:07:15,033 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 32 [2020-10-27 01:07:15,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:15,034 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2020-10-27 01:07:15,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2020-10-27 01:07:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:15,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:15,035 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] [2020-10-27 01:07:15,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:07:15,035 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1516025913, now seen corresponding path program 5 times [2020-10-27 01:07:15,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:15,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522552829] [2020-10-27 01:07:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:15,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:15,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:15,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:15,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-27 01:07:15,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:07:15,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:15,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:15,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:15,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:15,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:15,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:15,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:15,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:15,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:15,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:15,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:15,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522552829] [2020-10-27 01:07:15,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:15,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:15,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694479831] [2020-10-27 01:07:15,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:15,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:15,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:15,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:15,898 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand 12 states. [2020-10-27 01:07:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:16,592 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2020-10-27 01:07:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:16,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-27 01:07:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:16,594 INFO L225 Difference]: With dead ends: 152 [2020-10-27 01:07:16,594 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 01:07:16,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:07:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 01:07:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 113. [2020-10-27 01:07:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:07:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2020-10-27 01:07:16,608 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 35 [2020-10-27 01:07:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:16,608 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2020-10-27 01:07:16,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2020-10-27 01:07:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:16,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:16,609 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] [2020-10-27 01:07:16,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:07:16,609 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1650039419, now seen corresponding path program 5 times [2020-10-27 01:07:16,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:16,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188126832] [2020-10-27 01:07:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:16,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:16,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:17,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:17,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:17,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:17,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1139 [2020-10-27 01:07:17,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:07:17,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:18,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:18,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:18,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:18,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:18,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:18,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:18,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:18,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:18,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188126832] [2020-10-27 01:07:18,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:18,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:18,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160844141] [2020-10-27 01:07:18,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:18,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:18,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:18,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:18,121 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand 11 states. [2020-10-27 01:07:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:19,026 INFO L93 Difference]: Finished difference Result 165 states and 193 transitions. [2020-10-27 01:07:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:07:19,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:07:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:19,028 INFO L225 Difference]: With dead ends: 165 [2020-10-27 01:07:19,028 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 01:07:19,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:07:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 01:07:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 129. [2020-10-27 01:07:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:07:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2020-10-27 01:07:19,041 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 35 [2020-10-27 01:07:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:19,042 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2020-10-27 01:07:19,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2020-10-27 01:07:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:19,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:19,043 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] [2020-10-27 01:07:19,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:07:19,044 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash 493965601, now seen corresponding path program 2 times [2020-10-27 01:07:19,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:19,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587770722] [2020-10-27 01:07:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:19,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:19,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:19,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:19,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:19,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-27 01:07:19,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:07:19,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:19,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:19,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:19,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:19,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:19,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:19,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:19,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587770722] [2020-10-27 01:07:19,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:19,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:19,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118482217] [2020-10-27 01:07:19,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:19,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:19,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:19,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:19,824 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand 12 states. [2020-10-27 01:07:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:20,746 INFO L93 Difference]: Finished difference Result 165 states and 190 transitions. [2020-10-27 01:07:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:20,747 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-27 01:07:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:20,748 INFO L225 Difference]: With dead ends: 165 [2020-10-27 01:07:20,748 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 01:07:20,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 01:07:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 129. [2020-10-27 01:07:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:07:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2020-10-27 01:07:20,763 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 35 [2020-10-27 01:07:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:20,763 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2020-10-27 01:07:20,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2020-10-27 01:07:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:20,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:20,764 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] [2020-10-27 01:07:20,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:07:20,764 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1929531621, now seen corresponding path program 6 times [2020-10-27 01:07:20,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:20,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094989150] [2020-10-27 01:07:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:20,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:21,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:21,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:21,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:21,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-27 01:07:21,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:21,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:21,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:21,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:07:21,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:21,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:21,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:21,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:21,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:21,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:21,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:21,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:21,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:21,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:21,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:21,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:21,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094989150] [2020-10-27 01:07:21,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:21,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:21,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198269975] [2020-10-27 01:07:21,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:21,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:21,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:21,545 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand 13 states. [2020-10-27 01:07:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:22,583 INFO L93 Difference]: Finished difference Result 212 states and 245 transitions. [2020-10-27 01:07:22,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:22,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:07:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:22,585 INFO L225 Difference]: With dead ends: 212 [2020-10-27 01:07:22,585 INFO L226 Difference]: Without dead ends: 208 [2020-10-27 01:07:22,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-27 01:07:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 148. [2020-10-27 01:07:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 01:07:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2020-10-27 01:07:22,605 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 35 [2020-10-27 01:07:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:22,605 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2020-10-27 01:07:22,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2020-10-27 01:07:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:22,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:22,609 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] [2020-10-27 01:07:22,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:07:22,609 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:22,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:22,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1506829795, now seen corresponding path program 7 times [2020-10-27 01:07:22,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:22,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084102817] [2020-10-27 01:07:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:22,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:23,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:23,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:23,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:23,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-27 01:07:23,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:23,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:23,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:23,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:07:23,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:23,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:23,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:23,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:23,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:23,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:23,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:23,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:23,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:23,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084102817] [2020-10-27 01:07:23,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:23,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:23,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556094802] [2020-10-27 01:07:23,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:23,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:23,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:23,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:23,564 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand 13 states. [2020-10-27 01:07:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:24,538 INFO L93 Difference]: Finished difference Result 201 states and 234 transitions. [2020-10-27 01:07:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:24,539 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:07:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:24,540 INFO L225 Difference]: With dead ends: 201 [2020-10-27 01:07:24,540 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 01:07:24,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 01:07:24,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 120. [2020-10-27 01:07:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:07:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2020-10-27 01:07:24,555 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 35 [2020-10-27 01:07:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:24,556 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2020-10-27 01:07:24,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2020-10-27 01:07:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:24,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:24,557 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:24,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:07:24,557 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:24,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1182195041, now seen corresponding path program 5 times [2020-10-27 01:07:24,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:24,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146916881] [2020-10-27 01:07:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:24,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:24,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:25,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:25,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:25,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:25,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-27 01:07:25,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:07:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:07:25,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:25,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:25,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:25,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:25,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:25,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:25,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:25,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:25,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:25,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:25,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:25,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:07:25,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146916881] [2020-10-27 01:07:25,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:25,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:07:25,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867879599] [2020-10-27 01:07:25,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:07:25,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:25,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:07:25,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:07:25,195 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand 10 states. [2020-10-27 01:07:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:25,720 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2020-10-27 01:07:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:07:25,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-27 01:07:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:25,722 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:07:25,722 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:07:25,723 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 [2020-10-27 01:07:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:07:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-27 01:07:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:07:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-10-27 01:07:25,736 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 35 [2020-10-27 01:07:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:25,736 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-10-27 01:07:25,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:07:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-10-27 01:07:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:25,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:25,737 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] [2020-10-27 01:07:25,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:07:25,737 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash 407202121, now seen corresponding path program 8 times [2020-10-27 01:07:25,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:25,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367580805] [2020-10-27 01:07:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:25,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:25,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:26,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:26,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:26,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:26,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-27 01:07:26,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:07:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:07:26,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:26,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:26,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:26,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:26,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:26,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:26,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:26,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:26,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:26,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:26,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:26,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:07:26,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367580805] [2020-10-27 01:07:26,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:26,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:26,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797211389] [2020-10-27 01:07:26,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:26,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:26,998 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 11 states. [2020-10-27 01:07:27,548 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-27 01:07:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:28,023 INFO L93 Difference]: Finished difference Result 154 states and 179 transitions. [2020-10-27 01:07:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:07:28,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:07:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:28,025 INFO L225 Difference]: With dead ends: 154 [2020-10-27 01:07:28,025 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:07:28,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:07:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:07:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2020-10-27 01:07:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:07:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2020-10-27 01:07:28,045 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 35 [2020-10-27 01:07:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:28,045 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2020-10-27 01:07:28,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2020-10-27 01:07:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:28,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:28,046 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] [2020-10-27 01:07:28,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:07:28,046 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2023252357, now seen corresponding path program 3 times [2020-10-27 01:07:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:28,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301274972] [2020-10-27 01:07:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:28,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:28,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:28,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:28,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:07:28,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:07:28,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:28,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:28,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:28,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:28,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:28,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:07:28,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:28,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:28,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:28,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:28,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:28,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301274972] [2020-10-27 01:07:28,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:28,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:28,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127082913] [2020-10-27 01:07:28,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:28,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:28,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:28,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:28,836 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand 13 states. [2020-10-27 01:07:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:29,774 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2020-10-27 01:07:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:29,776 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:07:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:29,778 INFO L225 Difference]: With dead ends: 173 [2020-10-27 01:07:29,778 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:07:29,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:07:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 113. [2020-10-27 01:07:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:07:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2020-10-27 01:07:29,793 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 35 [2020-10-27 01:07:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:29,794 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2020-10-27 01:07:29,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2020-10-27 01:07:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:29,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:29,795 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] [2020-10-27 01:07:29,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:07:29,795 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:29,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1600550531, now seen corresponding path program 4 times [2020-10-27 01:07:29,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:29,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726975641] [2020-10-27 01:07:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:30,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:30,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:30,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:30,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-27 01:07:30,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:30,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:30,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:30,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:07:30,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:30,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:30,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:30,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:30,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:30,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:07:30,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:30,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:30,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:30,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726975641] [2020-10-27 01:07:30,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:30,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:30,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782952401] [2020-10-27 01:07:30,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:30,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:30,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:30,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:30,676 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand 13 states. [2020-10-27 01:07:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:31,599 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2020-10-27 01:07:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:07:31,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:07:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:31,601 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:07:31,601 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:07:31,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:31,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:07:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-10-27 01:07:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:07:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-10-27 01:07:31,615 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 35 [2020-10-27 01:07:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:31,615 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-10-27 01:07:31,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-10-27 01:07:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:31,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:31,616 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] [2020-10-27 01:07:31,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:07:31,616 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash 273188615, now seen corresponding path program 6 times [2020-10-27 01:07:31,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:31,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720388194] [2020-10-27 01:07:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:31,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:31,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:32,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:32,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:32,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:32,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-27 01:07:32,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:07:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:07:32,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:33,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:33,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:33,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:33,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:33,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:33,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:33,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:33,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:33,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:33,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:33,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:07:33,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720388194] [2020-10-27 01:07:33,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:33,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:33,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202479769] [2020-10-27 01:07:33,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:33,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:33,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:33,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:33,090 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 11 states. [2020-10-27 01:07:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:33,902 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2020-10-27 01:07:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:33,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:07:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:33,904 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:07:33,904 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:07:33,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:07:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:07:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2020-10-27 01:07:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:07:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-27 01:07:33,918 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 35 [2020-10-27 01:07:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:33,918 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-27 01:07:33,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-27 01:07:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:33,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:33,919 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, 1, 1] [2020-10-27 01:07:33,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:07:33,919 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:33,919 INFO L82 PathProgramCache]: Analyzing trace with hash -367469761, now seen corresponding path program 1 times [2020-10-27 01:07:33,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:33,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667404586] [2020-10-27 01:07:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:33,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:34,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:07:34,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:34,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-27 01:07:34,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:34,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:34,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:34,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:07:34,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:34,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:34,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:34,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:34,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:34,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:34,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:34,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:34,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:34,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:34,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:34,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667404586] [2020-10-27 01:07:34,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:34,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:34,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678723658] [2020-10-27 01:07:34,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:34,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:34,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:34,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:34,742 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 13 states. [2020-10-27 01:07:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:35,797 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2020-10-27 01:07:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:07:35,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-27 01:07:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:35,798 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:07:35,799 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 01:07:35,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 01:07:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2020-10-27 01:07:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:07:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2020-10-27 01:07:35,815 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 37 [2020-10-27 01:07:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:35,815 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2020-10-27 01:07:35,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:35,815 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2020-10-27 01:07:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:35,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:35,816 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, 1, 1] [2020-10-27 01:07:35,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:07:35,816 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:35,817 INFO L82 PathProgramCache]: Analyzing trace with hash -305430147, now seen corresponding path program 1 times [2020-10-27 01:07:35,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:35,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145921542] [2020-10-27 01:07:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:35,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:36,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:36,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:07:36,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:36,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-27 01:07:36,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:07:36,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:36,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:36,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:36,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:36,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:36,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:36,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:07:36,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:36,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:36,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:36,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:36,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:36,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145921542] [2020-10-27 01:07:36,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:36,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:36,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018984092] [2020-10-27 01:07:36,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:36,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:36,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:36,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:36,708 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand 13 states. [2020-10-27 01:07:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:37,938 INFO L93 Difference]: Finished difference Result 221 states and 252 transitions. [2020-10-27 01:07:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:37,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-27 01:07:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:37,942 INFO L225 Difference]: With dead ends: 221 [2020-10-27 01:07:37,942 INFO L226 Difference]: Without dead ends: 217 [2020-10-27 01:07:37,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-27 01:07:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 158. [2020-10-27 01:07:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 01:07:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2020-10-27 01:07:37,964 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 37 [2020-10-27 01:07:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:37,964 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2020-10-27 01:07:37,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2020-10-27 01:07:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:07:37,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:37,965 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] [2020-10-27 01:07:37,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:07:37,965 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:37,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1841656302, now seen corresponding path program 6 times [2020-10-27 01:07:37,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:37,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383146456] [2020-10-27 01:07:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:37,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:38,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:38,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:07:38,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:38,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 01:07:38,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:38,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:38,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:38,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:07:38,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:38,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:38,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:38,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:38,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:38,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:38,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:38,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:38,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:38,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:38,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:38,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:07:38,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383146456] [2020-10-27 01:07:38,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:38,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:38,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359288371] [2020-10-27 01:07:38,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:38,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:38,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:38,445 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 11 states. [2020-10-27 01:07:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:38,953 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2020-10-27 01:07:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:38,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-27 01:07:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:38,955 INFO L225 Difference]: With dead ends: 180 [2020-10-27 01:07:38,955 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 01:07:38,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:07:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 01:07:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-10-27 01:07:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:07:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2020-10-27 01:07:38,974 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 38 [2020-10-27 01:07:38,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:38,977 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2020-10-27 01:07:38,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2020-10-27 01:07:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:07:38,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:38,978 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] [2020-10-27 01:07:38,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:07:38,978 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1280091188, now seen corresponding path program 1 times [2020-10-27 01:07:38,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:38,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201278356] [2020-10-27 01:07:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:39,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:40,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:40,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:07:40,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:40,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-27 01:07:40,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:07:40,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:40,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:40,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:40,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:40,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:40,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:40,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:40,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:40,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201278356] [2020-10-27 01:07:40,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:40,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:40,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145976150] [2020-10-27 01:07:40,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:40,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:40,344 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand 13 states. [2020-10-27 01:07:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:41,283 INFO L93 Difference]: Finished difference Result 184 states and 207 transitions. [2020-10-27 01:07:41,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:41,283 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 01:07:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:41,285 INFO L225 Difference]: With dead ends: 184 [2020-10-27 01:07:41,285 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 01:07:41,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 01:07:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 149. [2020-10-27 01:07:41,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:07:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2020-10-27 01:07:41,307 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 38 [2020-10-27 01:07:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:41,307 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2020-10-27 01:07:41,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2020-10-27 01:07:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:07:41,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:41,308 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] [2020-10-27 01:07:41,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:07:41,308 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1146077682, now seen corresponding path program 5 times [2020-10-27 01:07:41,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:41,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111545896] [2020-10-27 01:07:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:41,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:41,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:07:41,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:41,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-27 01:07:41,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:07:41,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:42,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:42,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:42,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:42,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:42,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:42,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:42,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:42,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111545896] [2020-10-27 01:07:42,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:42,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:42,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382753232] [2020-10-27 01:07:42,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:42,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:42,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:42,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:42,426 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand 13 states. [2020-10-27 01:07:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:43,900 INFO L93 Difference]: Finished difference Result 189 states and 217 transitions. [2020-10-27 01:07:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:07:43,901 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 01:07:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:43,903 INFO L225 Difference]: With dead ends: 189 [2020-10-27 01:07:43,903 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:07:43,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:07:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:07:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2020-10-27 01:07:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:07:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 160 transitions. [2020-10-27 01:07:43,921 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 160 transitions. Word has length 38 [2020-10-27 01:07:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:43,922 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 160 transitions. [2020-10-27 01:07:43,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 160 transitions. [2020-10-27 01:07:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:07:43,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:43,923 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] [2020-10-27 01:07:43,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:07:43,923 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:43,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1059314202, now seen corresponding path program 9 times [2020-10-27 01:07:43,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:43,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579901097] [2020-10-27 01:07:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:43,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:44,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:44,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:46,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:46,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:07:46,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:46,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2552 [2020-10-27 01:07:46,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:46,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:46,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:46,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:07:46,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:46,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:46,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:46,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:46,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:46,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:46,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:46,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:46,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:46,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579901097] [2020-10-27 01:07:46,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:46,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:46,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251911044] [2020-10-27 01:07:46,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:46,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:46,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:46,835 INFO L87 Difference]: Start difference. First operand 144 states and 160 transitions. Second operand 13 states. [2020-10-27 01:07:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:47,519 INFO L93 Difference]: Finished difference Result 194 states and 218 transitions. [2020-10-27 01:07:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:47,520 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 01:07:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:47,522 INFO L225 Difference]: With dead ends: 194 [2020-10-27 01:07:47,522 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 01:07:47,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:07:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 01:07:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 161. [2020-10-27 01:07:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:07:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 179 transitions. [2020-10-27 01:07:47,547 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 179 transitions. Word has length 38 [2020-10-27 01:07:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:47,548 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 179 transitions. [2020-10-27 01:07:47,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 179 transitions. [2020-10-27 01:07:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:07:47,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:47,549 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] [2020-10-27 01:07:47,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:07:47,549 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1091648074, now seen corresponding path program 6 times [2020-10-27 01:07:47,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:47,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927406949] [2020-10-27 01:07:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:47,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:48,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:48,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:07:48,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:48,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-27 01:07:48,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:48,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:48,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:48,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:07:48,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:48,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:48,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:48,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:48,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:48,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:48,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:48,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:48,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:48,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927406949] [2020-10-27 01:07:48,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:48,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:48,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097215064] [2020-10-27 01:07:48,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:48,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:48,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:48,436 INFO L87 Difference]: Start difference. First operand 161 states and 179 transitions. Second operand 14 states. [2020-10-27 01:07:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:49,572 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2020-10-27 01:07:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:49,575 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 01:07:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:49,577 INFO L225 Difference]: With dead ends: 207 [2020-10-27 01:07:49,577 INFO L226 Difference]: Without dead ends: 203 [2020-10-27 01:07:49,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:07:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-27 01:07:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2020-10-27 01:07:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:07:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2020-10-27 01:07:49,600 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 38 [2020-10-27 01:07:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:49,600 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2020-10-27 01:07:49,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2020-10-27 01:07:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:07:49,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:49,601 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] [2020-10-27 01:07:49,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:07:49,601 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1225661580, now seen corresponding path program 7 times [2020-10-27 01:07:49,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:49,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733906757] [2020-10-27 01:07:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:49,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:50,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:50,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:07:50,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:50,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-27 01:07:50,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:07:50,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:50,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:50,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:50,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:50,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:50,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:50,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:07:50,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:50,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:50,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:50,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733906757] [2020-10-27 01:07:50,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:50,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276705641] [2020-10-27 01:07:50,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:50,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:50,579 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand 14 states. [2020-10-27 01:07:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:51,548 INFO L93 Difference]: Finished difference Result 220 states and 248 transitions. [2020-10-27 01:07:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:51,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 01:07:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:51,550 INFO L225 Difference]: With dead ends: 220 [2020-10-27 01:07:51,550 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 01:07:51,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 01:07:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 164. [2020-10-27 01:07:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:07:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2020-10-27 01:07:51,580 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 38 [2020-10-27 01:07:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:51,581 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2020-10-27 01:07:51,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2020-10-27 01:07:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:07:51,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:51,581 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, 1, 1] [2020-10-27 01:07:51,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:07:51,582 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:51,582 INFO L82 PathProgramCache]: Analyzing trace with hash 844699558, now seen corresponding path program 2 times [2020-10-27 01:07:51,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:51,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685251491] [2020-10-27 01:07:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:51,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:51,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:52,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:07:52,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:52,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-27 01:07:52,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:07:52,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:52,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:52,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:52,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:52,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:52,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:52,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:52,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:52,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:52,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:52,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:52,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685251491] [2020-10-27 01:07:52,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:52,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:52,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413082826] [2020-10-27 01:07:52,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:52,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:52,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:52,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:52,862 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand 13 states. [2020-10-27 01:07:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:54,330 INFO L93 Difference]: Finished difference Result 210 states and 236 transitions. [2020-10-27 01:07:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:54,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-27 01:07:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:54,332 INFO L225 Difference]: With dead ends: 210 [2020-10-27 01:07:54,332 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 01:07:54,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:07:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 01:07:54,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 173. [2020-10-27 01:07:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 01:07:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 193 transitions. [2020-10-27 01:07:54,357 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 193 transitions. Word has length 40 [2020-10-27 01:07:54,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:54,358 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 193 transitions. [2020-10-27 01:07:54,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 193 transitions. [2020-10-27 01:07:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:07:54,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:54,359 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, 1, 1] [2020-10-27 01:07:54,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:07:54,359 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash 473533302, now seen corresponding path program 3 times [2020-10-27 01:07:54,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:54,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938078747] [2020-10-27 01:07:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:54,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:55,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:55,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:07:55,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:55,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-27 01:07:55,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:55,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:55,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:55,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:07:55,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:55,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:55,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:55,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:55,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:55,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:55,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:55,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:55,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:55,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:55,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:55,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:55,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938078747] [2020-10-27 01:07:55,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:55,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:55,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289703655] [2020-10-27 01:07:55,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:55,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:55,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:55,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:55,490 INFO L87 Difference]: Start difference. First operand 173 states and 193 transitions. Second operand 13 states. [2020-10-27 01:07:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:56,315 INFO L93 Difference]: Finished difference Result 202 states and 225 transitions. [2020-10-27 01:07:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:56,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-27 01:07:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:56,317 INFO L225 Difference]: With dead ends: 202 [2020-10-27 01:07:56,317 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:07:56,318 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 [2020-10-27 01:07:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:07:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-27 01:07:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 01:07:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2020-10-27 01:07:56,336 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 40 [2020-10-27 01:07:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:56,336 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2020-10-27 01:07:56,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2020-10-27 01:07:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:07:56,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:56,337 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, 1, 1] [2020-10-27 01:07:56,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:07:56,338 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:56,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:56,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1864428916, now seen corresponding path program 4 times [2020-10-27 01:07:56,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:56,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225382451] [2020-10-27 01:07:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:56,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:56,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:07:56,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-27 01:07:56,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:07:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:57,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:57,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:57,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:57,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:57,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:57,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:57,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:57,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:57,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:57,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:57,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225382451] [2020-10-27 01:07:57,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:57,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:57,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806258425] [2020-10-27 01:07:57,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:57,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:57,459 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand 14 states. [2020-10-27 01:07:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:58,586 INFO L93 Difference]: Finished difference Result 229 states and 260 transitions. [2020-10-27 01:07:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:58,588 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-27 01:07:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:58,589 INFO L225 Difference]: With dead ends: 229 [2020-10-27 01:07:58,589 INFO L226 Difference]: Without dead ends: 225 [2020-10-27 01:07:58,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:07:58,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-27 01:07:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 149. [2020-10-27 01:07:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:07:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2020-10-27 01:07:58,618 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 40 [2020-10-27 01:07:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:58,618 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2020-10-27 01:07:58,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2020-10-27 01:07:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:07:58,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:58,621 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, 1, 1] [2020-10-27 01:07:58,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:07:58,621 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:58,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1802389302, now seen corresponding path program 5 times [2020-10-27 01:07:58,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:58,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097590480] [2020-10-27 01:07:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:58,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:59,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:59,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:59,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:07:59,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:59,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-27 01:07:59,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:07:59,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:00,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:00,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:00,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:00,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:00,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:00,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:00,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:00,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:00,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097590480] [2020-10-27 01:08:00,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:00,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:00,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060305429] [2020-10-27 01:08:00,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:00,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:00,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:00,284 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand 14 states. [2020-10-27 01:08:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:01,535 INFO L93 Difference]: Finished difference Result 240 states and 276 transitions. [2020-10-27 01:08:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:08:01,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-27 01:08:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:01,537 INFO L225 Difference]: With dead ends: 240 [2020-10-27 01:08:01,537 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 01:08:01,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 01:08:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 149. [2020-10-27 01:08:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:08:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2020-10-27 01:08:01,559 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 40 [2020-10-27 01:08:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:01,559 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2020-10-27 01:08:01,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2020-10-27 01:08:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:08:01,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:01,560 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-27 01:08:01,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:08:01,561 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1859736696, now seen corresponding path program 2 times [2020-10-27 01:08:01,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:01,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090368117] [2020-10-27 01:08:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:01,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:02,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:02,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:08:02,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:02,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1360 [2020-10-27 01:08:02,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:02,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:02,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:02,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:08:02,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:03,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:03,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:03,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:03,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:03,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:03,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:03,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:03,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:03,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090368117] [2020-10-27 01:08:03,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:03,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:03,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687814270] [2020-10-27 01:08:03,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:03,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:03,317 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand 13 states. [2020-10-27 01:08:04,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:04,117 INFO L93 Difference]: Finished difference Result 199 states and 227 transitions. [2020-10-27 01:08:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:08:04,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-27 01:08:04,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:04,119 INFO L225 Difference]: With dead ends: 199 [2020-10-27 01:08:04,120 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:08:04,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:08:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:08:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 167. [2020-10-27 01:08:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:08:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 189 transitions. [2020-10-27 01:08:04,144 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 189 transitions. Word has length 40 [2020-10-27 01:08:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:04,145 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 189 transitions. [2020-10-27 01:08:04,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 189 transitions. [2020-10-27 01:08:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:08:04,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:04,146 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:04,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:08:04,146 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:04,147 INFO L82 PathProgramCache]: Analyzing trace with hash -291225580, now seen corresponding path program 1 times [2020-10-27 01:08:04,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:04,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978764118] [2020-10-27 01:08:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:04,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:04,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:04,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:08:04,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:04,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-27 01:08:04,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:04,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:04,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:04,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:08:04,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:04,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:04,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:04,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:04,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:04,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:04,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:04,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:04,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:04,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978764118] [2020-10-27 01:08:04,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:04,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:04,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257715054] [2020-10-27 01:08:04,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:04,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:04,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:04,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:04,867 INFO L87 Difference]: Start difference. First operand 167 states and 189 transitions. Second operand 14 states. [2020-10-27 01:08:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:05,970 INFO L93 Difference]: Finished difference Result 195 states and 220 transitions. [2020-10-27 01:08:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:08:05,970 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-27 01:08:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:05,972 INFO L225 Difference]: With dead ends: 195 [2020-10-27 01:08:05,972 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 01:08:05,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 01:08:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 167. [2020-10-27 01:08:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:08:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 189 transitions. [2020-10-27 01:08:05,996 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 189 transitions. Word has length 40 [2020-10-27 01:08:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:05,997 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 189 transitions. [2020-10-27 01:08:05,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 189 transitions. [2020-10-27 01:08:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:08:05,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:05,998 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, 1, 1] [2020-10-27 01:08:05,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:08:05,998 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:05,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash -478225522, now seen corresponding path program 6 times [2020-10-27 01:08:05,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:05,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552350318] [2020-10-27 01:08:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:06,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:06,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:08:06,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-27 01:08:06,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:08:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:07,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:07,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:07,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:07,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:07,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:07,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:07,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:07,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:07,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:07,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:07,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:07,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552350318] [2020-10-27 01:08:07,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:07,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:07,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101928128] [2020-10-27 01:08:07,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:07,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:07,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:07,099 INFO L87 Difference]: Start difference. First operand 167 states and 189 transitions. Second operand 15 states. [2020-10-27 01:08:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:08,308 INFO L93 Difference]: Finished difference Result 287 states and 327 transitions. [2020-10-27 01:08:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:08,308 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-27 01:08:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:08,310 INFO L225 Difference]: With dead ends: 287 [2020-10-27 01:08:08,310 INFO L226 Difference]: Without dead ends: 283 [2020-10-27 01:08:08,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-27 01:08:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 173. [2020-10-27 01:08:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 01:08:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 199 transitions. [2020-10-27 01:08:08,338 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 199 transitions. Word has length 40 [2020-10-27 01:08:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:08,339 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 199 transitions. [2020-10-27 01:08:08,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 199 transitions. [2020-10-27 01:08:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:08:08,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:08,339 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, 1, 1] [2020-10-27 01:08:08,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:08:08,340 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:08,340 INFO L82 PathProgramCache]: Analyzing trace with hash -416185908, now seen corresponding path program 3 times [2020-10-27 01:08:08,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:08,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716169840] [2020-10-27 01:08:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:08,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:08,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:08,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:08:08,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:08,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-27 01:08:08,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:08:08,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:09,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:09,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:09,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:09,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:09,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:09,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:09,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:09,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:09,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:09,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:09,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716169840] [2020-10-27 01:08:09,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:09,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:09,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243275425] [2020-10-27 01:08:09,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:09,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:09,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:09,498 INFO L87 Difference]: Start difference. First operand 173 states and 199 transitions. Second operand 15 states. [2020-10-27 01:08:10,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:10,814 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2020-10-27 01:08:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:10,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-27 01:08:10,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:10,816 INFO L225 Difference]: With dead ends: 226 [2020-10-27 01:08:10,816 INFO L226 Difference]: Without dead ends: 222 [2020-10-27 01:08:10,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-27 01:08:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 144. [2020-10-27 01:08:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:08:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2020-10-27 01:08:10,842 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 40 [2020-10-27 01:08:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:10,842 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2020-10-27 01:08:10,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2020-10-27 01:08:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:08:10,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:10,843 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] [2020-10-27 01:08:10,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:08:10,844 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash -2080950845, now seen corresponding path program 2 times [2020-10-27 01:08:10,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:10,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919996656] [2020-10-27 01:08:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:10,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:11,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:11,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:11,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:08:11,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:11,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-27 01:08:11,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:11,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:11,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:11,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:08:11,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:12,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:12,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:12,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:12,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:12,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:12,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:12,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:12,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:12,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:12,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919996656] [2020-10-27 01:08:12,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:12,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:12,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2456020] [2020-10-27 01:08:12,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:12,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:12,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:12,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:12,070 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand 15 states. [2020-10-27 01:08:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:13,235 INFO L93 Difference]: Finished difference Result 233 states and 264 transitions. [2020-10-27 01:08:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:08:13,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-27 01:08:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:13,237 INFO L225 Difference]: With dead ends: 233 [2020-10-27 01:08:13,237 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 01:08:13,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:08:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 01:08:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-27 01:08:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:08:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2020-10-27 01:08:13,263 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 41 [2020-10-27 01:08:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:13,263 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2020-10-27 01:08:13,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2020-10-27 01:08:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:08:13,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:13,264 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] [2020-10-27 01:08:13,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:08:13,265 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:13,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2080002945, now seen corresponding path program 8 times [2020-10-27 01:08:13,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:13,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040648967] [2020-10-27 01:08:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:13,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:13,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:14,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:14,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:08:14,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:14,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-27 01:08:14,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:08:14,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:14,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:14,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:14,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:14,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:14,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:08:14,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:14,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:14,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040648967] [2020-10-27 01:08:14,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:14,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:14,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466043629] [2020-10-27 01:08:14,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:14,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:14,783 INFO L87 Difference]: Start difference. First operand 161 states and 182 transitions. Second operand 15 states. [2020-10-27 01:08:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:16,015 INFO L93 Difference]: Finished difference Result 241 states and 275 transitions. [2020-10-27 01:08:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:16,016 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-27 01:08:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:16,017 INFO L225 Difference]: With dead ends: 241 [2020-10-27 01:08:16,017 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 01:08:16,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 01:08:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 161. [2020-10-27 01:08:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:08:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2020-10-27 01:08:16,039 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 41 [2020-10-27 01:08:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:16,039 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2020-10-27 01:08:16,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2020-10-27 01:08:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:08:16,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:16,041 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] [2020-10-27 01:08:16,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:08:16,041 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash -157722811, now seen corresponding path program 9 times [2020-10-27 01:08:16,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:16,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975689984] [2020-10-27 01:08:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:16,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:16,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:16,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:08:16,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:16,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-27 01:08:16,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:16,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:16,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:08:16,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:17,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:17,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:17,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:17,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:17,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:17,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:17,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:17,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975689984] [2020-10-27 01:08:17,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:17,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:17,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193751959] [2020-10-27 01:08:17,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:17,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:17,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:17,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:17,367 INFO L87 Difference]: Start difference. First operand 161 states and 182 transitions. Second operand 15 states. [2020-10-27 01:08:17,923 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-27 01:08:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:18,471 INFO L93 Difference]: Finished difference Result 202 states and 228 transitions. [2020-10-27 01:08:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:08:18,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-27 01:08:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:18,473 INFO L225 Difference]: With dead ends: 202 [2020-10-27 01:08:18,473 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 01:08:18,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:08:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 01:08:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2020-10-27 01:08:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:08:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2020-10-27 01:08:18,494 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 41 [2020-10-27 01:08:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:18,494 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2020-10-27 01:08:18,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2020-10-27 01:08:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:08:18,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:18,495 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] [2020-10-27 01:08:18,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:08:18,495 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2058318591, now seen corresponding path program 10 times [2020-10-27 01:08:18,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:18,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089070491] [2020-10-27 01:08:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:18,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:18,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:18,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:08:18,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-27 01:08:18,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:08:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:19,170 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-27 01:08:19,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:19,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:19,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:19,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:19,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:19,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:08:19,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:19,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:19,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089070491] [2020-10-27 01:08:19,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:19,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:19,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047149690] [2020-10-27 01:08:19,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:19,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:19,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:19,676 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand 15 states. [2020-10-27 01:08:21,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:21,035 INFO L93 Difference]: Finished difference Result 196 states and 219 transitions. [2020-10-27 01:08:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:21,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-27 01:08:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:21,037 INFO L225 Difference]: With dead ends: 196 [2020-10-27 01:08:21,037 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 01:08:21,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:08:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 01:08:21,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 147. [2020-10-27 01:08:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:08:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 166 transitions. [2020-10-27 01:08:21,065 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 166 transitions. Word has length 41 [2020-10-27 01:08:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:21,065 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 166 transitions. [2020-10-27 01:08:21,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 166 transitions. [2020-10-27 01:08:21,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:08:21,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:21,066 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:21,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:08:21,066 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:21,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2102635199, now seen corresponding path program 11 times [2020-10-27 01:08:21,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:21,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705092491] [2020-10-27 01:08:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:21,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:21,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:21,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:08:21,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:21,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-27 01:08:21,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:08:21,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:22,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:22,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:22,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:22,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:22,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:22,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:22,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:22,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:22,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705092491] [2020-10-27 01:08:22,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:22,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144898862] [2020-10-27 01:08:22,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:22,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:22,612 INFO L87 Difference]: Start difference. First operand 147 states and 166 transitions. Second operand 15 states. [2020-10-27 01:08:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:23,837 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2020-10-27 01:08:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:08:23,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-27 01:08:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:23,839 INFO L225 Difference]: With dead ends: 179 [2020-10-27 01:08:23,839 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 01:08:23,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 01:08:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 127. [2020-10-27 01:08:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:08:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2020-10-27 01:08:23,864 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 41 [2020-10-27 01:08:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:23,864 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2020-10-27 01:08:23,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2020-10-27 01:08:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:08:23,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:23,865 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-27 01:08:23,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:08:23,865 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash -412731343, now seen corresponding path program 7 times [2020-10-27 01:08:23,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:23,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160910103] [2020-10-27 01:08:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:23,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:24,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:24,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:08:24,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:24,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-27 01:08:24,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:24,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:24,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:24,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:08:24,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:24,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:24,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:24,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:24,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:24,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:24,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:24,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:24,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:24,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160910103] [2020-10-27 01:08:24,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:24,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:24,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253908079] [2020-10-27 01:08:24,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:24,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:24,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:24,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:24,950 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand 15 states. [2020-10-27 01:08:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:26,273 INFO L93 Difference]: Finished difference Result 233 states and 262 transitions. [2020-10-27 01:08:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:08:26,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-27 01:08:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:26,275 INFO L225 Difference]: With dead ends: 233 [2020-10-27 01:08:26,275 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 01:08:26,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:08:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 01:08:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 191. [2020-10-27 01:08:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 01:08:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 213 transitions. [2020-10-27 01:08:26,309 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 213 transitions. Word has length 43 [2020-10-27 01:08:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:26,309 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 213 transitions. [2020-10-27 01:08:26,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 213 transitions. [2020-10-27 01:08:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:08:26,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:26,310 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-27 01:08:26,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:08:26,310 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:26,311 INFO L82 PathProgramCache]: Analyzing trace with hash 973472051, now seen corresponding path program 8 times [2020-10-27 01:08:26,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:26,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113272277] [2020-10-27 01:08:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:27,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:27,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:08:27,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:27,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-27 01:08:27,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:27,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:27,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:27,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:08:27,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:27,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:27,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:27,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:27,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:27,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:27,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:08:27,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:27,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:27,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:27,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:27,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:27,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113272277] [2020-10-27 01:08:27,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:27,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:27,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458261716] [2020-10-27 01:08:27,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:27,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:27,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:27,600 INFO L87 Difference]: Start difference. First operand 191 states and 213 transitions. Second operand 15 states. [2020-10-27 01:08:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:29,390 INFO L93 Difference]: Finished difference Result 313 states and 353 transitions. [2020-10-27 01:08:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:08:29,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-27 01:08:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:29,392 INFO L225 Difference]: With dead ends: 313 [2020-10-27 01:08:29,392 INFO L226 Difference]: Without dead ends: 309 [2020-10-27 01:08:29,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:08:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-27 01:08:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 239. [2020-10-27 01:08:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 01:08:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 265 transitions. [2020-10-27 01:08:29,434 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 265 transitions. Word has length 43 [2020-10-27 01:08:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:29,434 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 265 transitions. [2020-10-27 01:08:29,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 265 transitions. [2020-10-27 01:08:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:08:29,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:29,435 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:29,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:08:29,435 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1352786085, now seen corresponding path program 1 times [2020-10-27 01:08:29,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:29,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889421517] [2020-10-27 01:08:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:29,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:29,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:30,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:30,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:08:30,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:30,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-27 01:08:30,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:30,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:30,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:30,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:08:30,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:30,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:30,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:30,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:30,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:30,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:30,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:30,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:30,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:30,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:30,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:30,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:30,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889421517] [2020-10-27 01:08:30,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:30,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:30,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882954506] [2020-10-27 01:08:30,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:30,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:30,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:30,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:30,899 INFO L87 Difference]: Start difference. First operand 239 states and 265 transitions. Second operand 15 states. [2020-10-27 01:08:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:32,085 INFO L93 Difference]: Finished difference Result 263 states and 294 transitions. [2020-10-27 01:08:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:32,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-27 01:08:32,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:32,088 INFO L225 Difference]: With dead ends: 263 [2020-10-27 01:08:32,088 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 01:08:32,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:32,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 01:08:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2020-10-27 01:08:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 01:08:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 264 transitions. [2020-10-27 01:08:32,129 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 264 transitions. Word has length 43 [2020-10-27 01:08:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:32,129 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 264 transitions. [2020-10-27 01:08:32,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 264 transitions. [2020-10-27 01:08:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:08:32,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:32,130 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:32,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:08:32,131 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:32,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1555977817, now seen corresponding path program 2 times [2020-10-27 01:08:32,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:32,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698025525] [2020-10-27 01:08:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:32,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:32,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:32,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:08:32,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-27 01:08:32,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:08:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:33,135 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 01:08:33,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:33,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:33,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:33,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:33,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:33,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:08:33,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:33,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:33,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698025525] [2020-10-27 01:08:33,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:33,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:33,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681457123] [2020-10-27 01:08:33,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:33,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:33,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:33,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:33,565 INFO L87 Difference]: Start difference. First operand 239 states and 264 transitions. Second operand 15 states. [2020-10-27 01:08:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:35,350 INFO L93 Difference]: Finished difference Result 330 states and 366 transitions. [2020-10-27 01:08:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:35,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-27 01:08:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:35,353 INFO L225 Difference]: With dead ends: 330 [2020-10-27 01:08:35,353 INFO L226 Difference]: Without dead ends: 316 [2020-10-27 01:08:35,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:08:35,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-27 01:08:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 249. [2020-10-27 01:08:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-27 01:08:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 277 transitions. [2020-10-27 01:08:35,399 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 277 transitions. Word has length 43 [2020-10-27 01:08:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:35,399 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 277 transitions. [2020-10-27 01:08:35,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 277 transitions. [2020-10-27 01:08:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:08:35,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:35,400 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-27 01:08:35,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:08:35,401 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:35,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash -516459321, now seen corresponding path program 9 times [2020-10-27 01:08:35,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:35,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407838884] [2020-10-27 01:08:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:35,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:35,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:36,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:37,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:37,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:08:37,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:37,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2267 [2020-10-27 01:08:37,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:37,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:37,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:37,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:08:37,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:38,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:38,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:38,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:38,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:38,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:38,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:38,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:38,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:38,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:38,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:38,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:38,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407838884] [2020-10-27 01:08:38,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:38,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:38,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142772558] [2020-10-27 01:08:38,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:38,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:38,445 INFO L87 Difference]: Start difference. First operand 249 states and 277 transitions. Second operand 16 states. [2020-10-27 01:08:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:39,882 INFO L93 Difference]: Finished difference Result 333 states and 373 transitions. [2020-10-27 01:08:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:39,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 01:08:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:39,884 INFO L225 Difference]: With dead ends: 333 [2020-10-27 01:08:39,884 INFO L226 Difference]: Without dead ends: 320 [2020-10-27 01:08:39,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:08:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-27 01:08:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 288. [2020-10-27 01:08:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-27 01:08:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 321 transitions. [2020-10-27 01:08:39,935 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 321 transitions. Word has length 43 [2020-10-27 01:08:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:39,935 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 321 transitions. [2020-10-27 01:08:39,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 321 transitions. [2020-10-27 01:08:39,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:08:39,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:39,937 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:39,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:08:39,937 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:39,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1627545699, now seen corresponding path program 3 times [2020-10-27 01:08:39,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:39,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463617760] [2020-10-27 01:08:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:40,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:40,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:40,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:08:40,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:40,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-27 01:08:40,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:40,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:40,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:40,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:08:40,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:40,736 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-27 01:08:41,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:41,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:41,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:41,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:41,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:41,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:41,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:41,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463617760] [2020-10-27 01:08:41,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:41,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:41,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586985772] [2020-10-27 01:08:41,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:41,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:41,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:41,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:41,064 INFO L87 Difference]: Start difference. First operand 288 states and 321 transitions. Second operand 16 states. [2020-10-27 01:08:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:42,696 INFO L93 Difference]: Finished difference Result 341 states and 377 transitions. [2020-10-27 01:08:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:08:42,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 01:08:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:42,699 INFO L225 Difference]: With dead ends: 341 [2020-10-27 01:08:42,699 INFO L226 Difference]: Without dead ends: 337 [2020-10-27 01:08:42,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:08:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-27 01:08:42,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 288. [2020-10-27 01:08:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-27 01:08:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 321 transitions. [2020-10-27 01:08:42,771 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 321 transitions. Word has length 43 [2020-10-27 01:08:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:42,771 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 321 transitions. [2020-10-27 01:08:42,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 321 transitions. [2020-10-27 01:08:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:08:42,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:42,774 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-27 01:08:42,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:08:42,774 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:42,774 INFO L82 PathProgramCache]: Analyzing trace with hash 869744073, now seen corresponding path program 4 times [2020-10-27 01:08:42,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:42,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136614819] [2020-10-27 01:08:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:42,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:43,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:43,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:45,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:45,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:08:45,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:45,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2669 [2020-10-27 01:08:45,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:45,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:45,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:45,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:08:45,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:46,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:46,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:46,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:46,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:46,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:46,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:46,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:46,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:46,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136614819] [2020-10-27 01:08:46,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:46,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:46,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89623801] [2020-10-27 01:08:46,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:46,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:46,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:46,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:46,300 INFO L87 Difference]: Start difference. First operand 288 states and 321 transitions. Second operand 16 states. [2020-10-27 01:08:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:47,943 INFO L93 Difference]: Finished difference Result 375 states and 420 transitions. [2020-10-27 01:08:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:47,944 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 01:08:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:47,946 INFO L225 Difference]: With dead ends: 375 [2020-10-27 01:08:47,946 INFO L226 Difference]: Without dead ends: 362 [2020-10-27 01:08:47,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:08:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-27 01:08:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 325. [2020-10-27 01:08:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 01:08:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 361 transitions. [2020-10-27 01:08:47,991 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 361 transitions. Word has length 43 [2020-10-27 01:08:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:47,992 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 361 transitions. [2020-10-27 01:08:47,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 361 transitions. [2020-10-27 01:08:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:08:47,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:47,993 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:47,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:08:47,993 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:47,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1281218203, now seen corresponding path program 2 times [2020-10-27 01:08:47,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:47,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534516967] [2020-10-27 01:08:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:48,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:48,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:08:48,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:48,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-27 01:08:48,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:48,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:48,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:48,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:08:48,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:49,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:49,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:49,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:49,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:49,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:49,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:49,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:49,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:49,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:49,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:49,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:49,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534516967] [2020-10-27 01:08:49,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:49,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:49,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845502895] [2020-10-27 01:08:49,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:49,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:49,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:49,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:49,160 INFO L87 Difference]: Start difference. First operand 325 states and 361 transitions. Second operand 16 states. [2020-10-27 01:08:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:50,663 INFO L93 Difference]: Finished difference Result 384 states and 425 transitions. [2020-10-27 01:08:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:50,664 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 01:08:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:50,666 INFO L225 Difference]: With dead ends: 384 [2020-10-27 01:08:50,666 INFO L226 Difference]: Without dead ends: 380 [2020-10-27 01:08:50,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:08:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-27 01:08:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 309. [2020-10-27 01:08:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-27 01:08:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 343 transitions. [2020-10-27 01:08:50,721 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 343 transitions. Word has length 43 [2020-10-27 01:08:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:50,721 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 343 transitions. [2020-10-27 01:08:50,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 343 transitions. [2020-10-27 01:08:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:08:50,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:50,722 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:50,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:08:50,723 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:50,723 INFO L82 PathProgramCache]: Analyzing trace with hash 276072595, now seen corresponding path program 5 times [2020-10-27 01:08:50,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:50,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530035216] [2020-10-27 01:08:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:50,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:50,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:51,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:51,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:08:51,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:51,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-27 01:08:51,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:51,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:51,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:51,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:08:51,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:52,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:52,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:52,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:52,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:52,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:52,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:52,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:52,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530035216] [2020-10-27 01:08:52,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:52,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:52,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207488314] [2020-10-27 01:08:52,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:52,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:52,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:52,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:52,170 INFO L87 Difference]: Start difference. First operand 309 states and 343 transitions. Second operand 14 states. [2020-10-27 01:08:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:53,278 INFO L93 Difference]: Finished difference Result 337 states and 373 transitions. [2020-10-27 01:08:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:53,279 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 01:08:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:53,281 INFO L225 Difference]: With dead ends: 337 [2020-10-27 01:08:53,281 INFO L226 Difference]: Without dead ends: 284 [2020-10-27 01:08:53,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-27 01:08:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2020-10-27 01:08:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 01:08:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 316 transitions. [2020-10-27 01:08:53,345 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 316 transitions. Word has length 45 [2020-10-27 01:08:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:53,345 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 316 transitions. [2020-10-27 01:08:53,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 316 transitions. [2020-10-27 01:08:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:08:53,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:53,349 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, 1, 1] [2020-10-27 01:08:53,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 01:08:53,349 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:53,350 INFO L82 PathProgramCache]: Analyzing trace with hash 705474884, now seen corresponding path program 10 times [2020-10-27 01:08:53,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:53,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088796868] [2020-10-27 01:08:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:53,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:54,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:54,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:08:54,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:54,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1051 [2020-10-27 01:08:54,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:54,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:54,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:08:54,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:54,863 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-27 01:08:55,074 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-27 01:08:55,260 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-27 01:08:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:55,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:55,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:55,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:55,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:55,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:55,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:55,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:55,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:55,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:55,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:55,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088796868] [2020-10-27 01:08:55,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:55,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:55,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687798990] [2020-10-27 01:08:55,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:55,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:55,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:55,704 INFO L87 Difference]: Start difference. First operand 284 states and 316 transitions. Second operand 16 states. [2020-10-27 01:08:56,244 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-27 01:08:56,477 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-27 01:08:56,842 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-27 01:08:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:58,228 INFO L93 Difference]: Finished difference Result 332 states and 370 transitions. [2020-10-27 01:08:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:58,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-27 01:08:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:58,230 INFO L225 Difference]: With dead ends: 332 [2020-10-27 01:08:58,230 INFO L226 Difference]: Without dead ends: 328 [2020-10-27 01:08:58,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:08:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-27 01:08:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 284. [2020-10-27 01:08:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 01:08:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 316 transitions. [2020-10-27 01:08:58,268 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 316 transitions. Word has length 46 [2020-10-27 01:08:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:58,268 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 316 transitions. [2020-10-27 01:08:58,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 316 transitions. [2020-10-27 01:08:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:08:58,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:58,270 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, 1, 1] [2020-10-27 01:08:58,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 01:08:58,270 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash 168052678, now seen corresponding path program 11 times [2020-10-27 01:08:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:58,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189383386] [2020-10-27 01:08:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:58,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:58,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:59,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:59,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:08:59,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:59,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1556 [2020-10-27 01:08:59,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:59,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:08:59,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:59,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:08:59,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:00,344 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-27 01:09:00,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:00,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:00,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:00,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:00,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:00,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:00,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:00,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:00,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:00,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:00,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:00,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189383386] [2020-10-27 01:09:00,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:00,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:09:00,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123071444] [2020-10-27 01:09:00,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:09:00,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:00,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:09:00,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:00,719 INFO L87 Difference]: Start difference. First operand 284 states and 316 transitions. Second operand 17 states. [2020-10-27 01:09:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:02,406 INFO L93 Difference]: Finished difference Result 442 states and 490 transitions. [2020-10-27 01:09:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:09:02,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-27 01:09:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:02,410 INFO L225 Difference]: With dead ends: 442 [2020-10-27 01:09:02,410 INFO L226 Difference]: Without dead ends: 429 [2020-10-27 01:09:02,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:09:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-27 01:09:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 327. [2020-10-27 01:09:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-27 01:09:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 365 transitions. [2020-10-27 01:09:02,469 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 365 transitions. Word has length 46 [2020-10-27 01:09:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:02,469 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 365 transitions. [2020-10-27 01:09:02,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:09:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 365 transitions. [2020-10-27 01:09:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:09:02,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:02,470 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1] [2020-10-27 01:09:02,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 01:09:02,471 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1554256072, now seen corresponding path program 12 times [2020-10-27 01:09:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:02,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440823054] [2020-10-27 01:09:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:02,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:02,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:03,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:03,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:09:03,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:03,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-27 01:09:03,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:03,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:09:03,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:03,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:09:03,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:04,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:04,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:04,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:04,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:04,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:09:04,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:04,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440823054] [2020-10-27 01:09:04,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:04,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:09:04,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314362471] [2020-10-27 01:09:04,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:09:04,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:09:04,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:04,649 INFO L87 Difference]: Start difference. First operand 327 states and 365 transitions. Second operand 17 states. [2020-10-27 01:09:05,465 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-27 01:09:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:07,238 INFO L93 Difference]: Finished difference Result 474 states and 529 transitions. [2020-10-27 01:09:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:09:07,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-27 01:09:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:07,241 INFO L225 Difference]: With dead ends: 474 [2020-10-27 01:09:07,241 INFO L226 Difference]: Without dead ends: 461 [2020-10-27 01:09:07,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:09:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-27 01:09:07,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 327. [2020-10-27 01:09:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-27 01:09:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 365 transitions. [2020-10-27 01:09:07,285 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 365 transitions. Word has length 46 [2020-10-27 01:09:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:07,285 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 365 transitions. [2020-10-27 01:09:07,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:09:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 365 transitions. [2020-10-27 01:09:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:09:07,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:07,287 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, 1, 1] [2020-10-27 01:09:07,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 01:09:07,287 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash 980234498, now seen corresponding path program 13 times [2020-10-27 01:09:07,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:07,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759643148] [2020-10-27 01:09:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:07,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:08,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:09:08,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:08,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1433 [2020-10-27 01:09:08,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:08,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:09:08,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:08,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:09:08,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:09,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:09,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:09,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:09,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:09,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:09,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:09,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:09,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:09,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759643148] [2020-10-27 01:09:09,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:09,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:09:09,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584352808] [2020-10-27 01:09:09,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:09:09,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:09:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:09,449 INFO L87 Difference]: Start difference. First operand 327 states and 365 transitions. Second operand 16 states. [2020-10-27 01:09:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:11,473 INFO L93 Difference]: Finished difference Result 384 states and 430 transitions. [2020-10-27 01:09:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:09:11,473 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-27 01:09:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:11,475 INFO L225 Difference]: With dead ends: 384 [2020-10-27 01:09:11,475 INFO L226 Difference]: Without dead ends: 371 [2020-10-27 01:09:11,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:09:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-10-27 01:09:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 351. [2020-10-27 01:09:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-27 01:09:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 390 transitions. [2020-10-27 01:09:11,538 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 390 transitions. Word has length 46 [2020-10-27 01:09:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:11,538 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 390 transitions. [2020-10-27 01:09:11,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:09:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 390 transitions. [2020-10-27 01:09:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:09:11,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:11,539 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:11,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 01:09:11,539 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:11,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:11,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1170727778, now seen corresponding path program 4 times [2020-10-27 01:09:11,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:11,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588198806] [2020-10-27 01:09:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:11,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:12,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:12,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:09:12,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:12,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-27 01:09:12,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:09:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:09:12,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:12,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:12,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:12,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:12,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:12,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:12,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:09:12,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:12,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:12,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:12,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:12,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:12,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588198806] [2020-10-27 01:09:12,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:12,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:09:12,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743346256] [2020-10-27 01:09:12,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:09:12,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:09:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:12,998 INFO L87 Difference]: Start difference. First operand 351 states and 390 transitions. Second operand 16 states. [2020-10-27 01:09:15,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:15,153 INFO L93 Difference]: Finished difference Result 374 states and 416 transitions. [2020-10-27 01:09:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:09:15,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-27 01:09:15,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:15,156 INFO L225 Difference]: With dead ends: 374 [2020-10-27 01:09:15,156 INFO L226 Difference]: Without dead ends: 370 [2020-10-27 01:09:15,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:09:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-27 01:09:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 330. [2020-10-27 01:09:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-27 01:09:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 368 transitions. [2020-10-27 01:09:15,205 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 368 transitions. Word has length 46 [2020-10-27 01:09:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:15,205 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 368 transitions. [2020-10-27 01:09:15,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:09:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 368 transitions. [2020-10-27 01:09:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:09:15,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:15,207 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1] [2020-10-27 01:09:15,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 01:09:15,207 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 442812292, now seen corresponding path program 14 times [2020-10-27 01:09:15,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:15,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840041333] [2020-10-27 01:09:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:15,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:16,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:16,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:09:16,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:16,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-27 01:09:16,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:16,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:09:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:09:16,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:16,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:16,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:16,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:16,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:16,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:16,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:16,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:16,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:16,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:16,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:16,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840041333] [2020-10-27 01:09:16,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:16,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:09:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735186059] [2020-10-27 01:09:16,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:09:16,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:16,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:09:16,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:16,851 INFO L87 Difference]: Start difference. First operand 330 states and 368 transitions. Second operand 17 states. [2020-10-27 01:09:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:19,105 INFO L93 Difference]: Finished difference Result 427 states and 477 transitions. [2020-10-27 01:09:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:09:19,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-27 01:09:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:19,108 INFO L225 Difference]: With dead ends: 427 [2020-10-27 01:09:19,108 INFO L226 Difference]: Without dead ends: 423 [2020-10-27 01:09:19,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:09:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-27 01:09:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 335. [2020-10-27 01:09:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-27 01:09:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 373 transitions. [2020-10-27 01:09:19,151 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 373 transitions. Word has length 46 [2020-10-27 01:09:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:19,152 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 373 transitions. [2020-10-27 01:09:19,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:09:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 373 transitions. [2020-10-27 01:09:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:09:19,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:19,153 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, 1, 1] [2020-10-27 01:09:19,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 01:09:19,153 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:19,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1373231890, now seen corresponding path program 15 times [2020-10-27 01:09:19,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:19,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845965042] [2020-10-27 01:09:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:19,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:19,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:20,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:20,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:09:20,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:20,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-27 01:09:20,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:09:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:09:20,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:20,872 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-27 01:09:21,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:21,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:21,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:21,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:21,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:21,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:21,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:21,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:21,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:21,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:21,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:21,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845965042] [2020-10-27 01:09:21,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:21,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:09:21,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591368381] [2020-10-27 01:09:21,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:09:21,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:09:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:21,450 INFO L87 Difference]: Start difference. First operand 335 states and 373 transitions. Second operand 17 states. [2020-10-27 01:09:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:23,979 INFO L93 Difference]: Finished difference Result 516 states and 567 transitions. [2020-10-27 01:09:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:09:23,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-27 01:09:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:23,982 INFO L225 Difference]: With dead ends: 516 [2020-10-27 01:09:23,983 INFO L226 Difference]: Without dead ends: 503 [2020-10-27 01:09:23,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:09:23,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-10-27 01:09:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 412. [2020-10-27 01:09:24,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-27 01:09:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 456 transitions. [2020-10-27 01:09:24,053 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 456 transitions. Word has length 46 [2020-10-27 01:09:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:24,053 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 456 transitions. [2020-10-27 01:09:24,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:09:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 456 transitions. [2020-10-27 01:09:24,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:09:24,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:24,055 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-27 01:09:24,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 01:09:24,055 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:24,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1098472276, now seen corresponding path program 6 times [2020-10-27 01:09:24,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:24,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987639244] [2020-10-27 01:09:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:24,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:24,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:26,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:26,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:09:26,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:26,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2482 [2020-10-27 01:09:26,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:09:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:09:26,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:27,008 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-27 01:09:27,226 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 01:09:27,388 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 01:09:27,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:27,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:27,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:27,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:27,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:27,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:27,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:27,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:27,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:27,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:27,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:27,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987639244] [2020-10-27 01:09:27,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:27,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:09:27,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121446207] [2020-10-27 01:09:27,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:09:27,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:27,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:09:27,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:27,696 INFO L87 Difference]: Start difference. First operand 412 states and 456 transitions. Second operand 17 states. [2020-10-27 01:09:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:30,403 INFO L93 Difference]: Finished difference Result 542 states and 603 transitions. [2020-10-27 01:09:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:09:30,404 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-27 01:09:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:30,406 INFO L225 Difference]: With dead ends: 542 [2020-10-27 01:09:30,406 INFO L226 Difference]: Without dead ends: 538 [2020-10-27 01:09:30,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:09:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-10-27 01:09:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 407. [2020-10-27 01:09:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-10-27 01:09:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 452 transitions. [2020-10-27 01:09:30,465 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 452 transitions. Word has length 46 [2020-10-27 01:09:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:30,465 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 452 transitions. [2020-10-27 01:09:30,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:09:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 452 transitions. [2020-10-27 01:09:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:09:30,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:30,467 INFO L422 BasicCegarLoop]: trace histogram [6, 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, 1, 1] [2020-10-27 01:09:30,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-27 01:09:30,467 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:30,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1420835665, now seen corresponding path program 16 times [2020-10-27 01:09:30,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:30,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914670080] [2020-10-27 01:09:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:30,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:09:30,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:30,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-27 01:09:30,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:09:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:09:30,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:31,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:31,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:31,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:31,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:31,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:31,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:09:31,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:31,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:09:31,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914670080] [2020-10-27 01:09:31,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:31,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:09:31,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567441504] [2020-10-27 01:09:31,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:09:31,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:09:31,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:31,381 INFO L87 Difference]: Start difference. First operand 407 states and 452 transitions. Second operand 15 states. [2020-10-27 01:09:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:32,771 INFO L93 Difference]: Finished difference Result 479 states and 527 transitions. [2020-10-27 01:09:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:09:32,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 01:09:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:32,773 INFO L225 Difference]: With dead ends: 479 [2020-10-27 01:09:32,773 INFO L226 Difference]: Without dead ends: 407 [2020-10-27 01:09:32,774 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 [2020-10-27 01:09:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-27 01:09:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2020-10-27 01:09:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-10-27 01:09:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 449 transitions. [2020-10-27 01:09:32,839 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 449 transitions. Word has length 49 [2020-10-27 01:09:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:32,839 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 449 transitions. [2020-10-27 01:09:32,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:09:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 449 transitions. [2020-10-27 01:09:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:09:32,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:32,841 INFO L422 BasicCegarLoop]: trace histogram [6, 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, 1, 1] [2020-10-27 01:09:32,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-27 01:09:32,841 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:32,841 INFO L82 PathProgramCache]: Analyzing trace with hash 576830163, now seen corresponding path program 17 times [2020-10-27 01:09:32,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:32,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972550974] [2020-10-27 01:09:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:32,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:33,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:33,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:35,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:35,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:09:35,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:35,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2696 [2020-10-27 01:09:35,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:09:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:09:35,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:36,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:36,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:36,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:36,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:36,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:36,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:36,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:36,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:36,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:36,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:36,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:36,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972550974] [2020-10-27 01:09:36,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:36,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:09:36,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980271227] [2020-10-27 01:09:36,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:09:36,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:36,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:09:36,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:36,174 INFO L87 Difference]: Start difference. First operand 407 states and 449 transitions. Second operand 16 states. [2020-10-27 01:09:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:38,003 INFO L93 Difference]: Finished difference Result 430 states and 474 transitions. [2020-10-27 01:09:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:09:38,004 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 01:09:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:38,006 INFO L225 Difference]: With dead ends: 430 [2020-10-27 01:09:38,006 INFO L226 Difference]: Without dead ends: 352 [2020-10-27 01:09:38,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:09:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-27 01:09:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2020-10-27 01:09:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-27 01:09:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 390 transitions. [2020-10-27 01:09:38,068 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 390 transitions. Word has length 49 [2020-10-27 01:09:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:38,069 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 390 transitions. [2020-10-27 01:09:38,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:09:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 390 transitions. [2020-10-27 01:09:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:09:38,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:38,070 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:38,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-27 01:09:38,070 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:38,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:38,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1869970705, now seen corresponding path program 18 times [2020-10-27 01:09:38,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:38,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193534846] [2020-10-27 01:09:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:38,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:38,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2930 [2020-10-27 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:41,368 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 01:09:41,504 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-27 01:09:41,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:41,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:41,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:41,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:41,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:09:41,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:41,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193534846] [2020-10-27 01:09:41,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:41,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:09:41,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490673225] [2020-10-27 01:09:41,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:09:41,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:09:41,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:41,887 INFO L87 Difference]: Start difference. First operand 352 states and 390 transitions. Second operand 17 states. [2020-10-27 01:09:43,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:43,557 INFO L93 Difference]: Finished difference Result 440 states and 490 transitions. [2020-10-27 01:09:43,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:09:43,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-27 01:09:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:43,560 INFO L225 Difference]: With dead ends: 440 [2020-10-27 01:09:43,561 INFO L226 Difference]: Without dead ends: 427 [2020-10-27 01:09:43,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:09:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-27 01:09:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 416. [2020-10-27 01:09:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-27 01:09:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 460 transitions. [2020-10-27 01:09:43,627 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 460 transitions. Word has length 49 [2020-10-27 01:09:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:43,627 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 460 transitions. [2020-10-27 01:09:43,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:09:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 460 transitions. [2020-10-27 01:09:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:09:43,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:43,628 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:43,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-27 01:09:43,628 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash -280991571, now seen corresponding path program 5 times [2020-10-27 01:09:43,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:43,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343988343] [2020-10-27 01:09:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:43,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:44,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:44,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:09:44,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:44,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-27 01:09:44,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:09:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:09:44,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:44,827 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-27 01:09:45,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:45,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:45,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:45,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:45,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:45,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:45,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:45,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:45,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:45,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343988343] [2020-10-27 01:09:45,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:45,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:09:45,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561623276] [2020-10-27 01:09:45,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:09:45,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:45,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:09:45,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:09:45,215 INFO L87 Difference]: Start difference. First operand 416 states and 460 transitions. Second operand 18 states. [2020-10-27 01:09:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:47,742 INFO L93 Difference]: Finished difference Result 436 states and 483 transitions. [2020-10-27 01:09:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:09:47,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-27 01:09:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:47,745 INFO L225 Difference]: With dead ends: 436 [2020-10-27 01:09:47,745 INFO L226 Difference]: Without dead ends: 432 [2020-10-27 01:09:47,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:09:47,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-27 01:09:47,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 416. [2020-10-27 01:09:47,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-27 01:09:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 460 transitions. [2020-10-27 01:09:47,804 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 460 transitions. Word has length 49 [2020-10-27 01:09:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:47,804 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 460 transitions. [2020-10-27 01:09:47,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:09:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 460 transitions. [2020-10-27 01:09:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:09:47,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:47,805 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-10-27 01:09:47,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-27 01:09:47,806 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2144730319, now seen corresponding path program 19 times [2020-10-27 01:09:47,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:47,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500941612] [2020-10-27 01:09:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:47,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:48,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:49,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:52,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:52,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:09:52,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:52,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4744 [2020-10-27 01:09:52,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:52,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:09:52,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:52,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:09:52,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:52,917 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 01:09:53,069 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-27 01:09:53,209 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-27 01:09:53,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:53,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:53,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:53,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:53,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:53,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 01:09:53,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:53,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:53,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:53,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:53,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:53,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500941612] [2020-10-27 01:09:53,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:53,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:09:53,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101107165] [2020-10-27 01:09:53,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:09:53,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:53,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:09:53,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:53,543 INFO L87 Difference]: Start difference. First operand 416 states and 460 transitions. Second operand 17 states. [2020-10-27 01:09:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:55,332 INFO L93 Difference]: Finished difference Result 508 states and 564 transitions. [2020-10-27 01:09:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:09:55,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-27 01:09:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:55,334 INFO L225 Difference]: With dead ends: 508 [2020-10-27 01:09:55,334 INFO L226 Difference]: Without dead ends: 495 [2020-10-27 01:09:55,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:09:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-27 01:09:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 480. [2020-10-27 01:09:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-27 01:09:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 530 transitions. [2020-10-27 01:09:55,398 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 530 transitions. Word has length 49 [2020-10-27 01:09:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:55,399 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 530 transitions. [2020-10-27 01:09:55,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:09:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 530 transitions. [2020-10-27 01:09:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:09:55,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:55,400 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:55,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-27 01:09:55,400 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash -6231957, now seen corresponding path program 6 times [2020-10-27 01:09:55,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:55,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727567918] [2020-10-27 01:09:55,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:55,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:56,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:56,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:09:56,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:56,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-27 01:09:56,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:56,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:09:56,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:56,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:09:56,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:56,730 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-27 01:09:57,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:57,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:57,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:57,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:57,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:57,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:57,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:57,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:57,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727567918] [2020-10-27 01:09:57,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:57,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:09:57,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588296799] [2020-10-27 01:09:57,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:09:57,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:57,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:09:57,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:09:57,208 INFO L87 Difference]: Start difference. First operand 480 states and 530 transitions. Second operand 18 states. [2020-10-27 01:09:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:59,851 INFO L93 Difference]: Finished difference Result 568 states and 627 transitions. [2020-10-27 01:09:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:09:59,852 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-27 01:09:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:59,855 INFO L225 Difference]: With dead ends: 568 [2020-10-27 01:09:59,855 INFO L226 Difference]: Without dead ends: 564 [2020-10-27 01:09:59,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:09:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-27 01:09:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 480. [2020-10-27 01:09:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-27 01:09:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 530 transitions. [2020-10-27 01:09:59,919 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 530 transitions. Word has length 49 [2020-10-27 01:09:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:59,919 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 530 transitions. [2020-10-27 01:09:59,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:09:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 530 transitions. [2020-10-27 01:09:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:09:59,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:59,920 INFO L422 BasicCegarLoop]: trace histogram [6, 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, 1, 1] [2020-10-27 01:09:59,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-27 01:09:59,920 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash -494194841, now seen corresponding path program 20 times [2020-10-27 01:09:59,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:59,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170251783] [2020-10-27 01:09:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:00,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:00,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:00,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:02,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:02,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:10:02,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:02,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2860 [2020-10-27 01:10:02,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:10:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:03,161 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 01:10:03,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:03,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:03,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:03,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:03,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:03,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:03,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:03,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:03,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:03,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:03,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:10:03,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170251783] [2020-10-27 01:10:03,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:03,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:10:03,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387011439] [2020-10-27 01:10:03,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:10:03,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:10:03,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:03,485 INFO L87 Difference]: Start difference. First operand 480 states and 530 transitions. Second operand 15 states. [2020-10-27 01:10:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:04,626 INFO L93 Difference]: Finished difference Result 512 states and 567 transitions. [2020-10-27 01:10:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:10:04,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 01:10:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:04,630 INFO L225 Difference]: With dead ends: 512 [2020-10-27 01:10:04,630 INFO L226 Difference]: Without dead ends: 493 [2020-10-27 01:10:04,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:10:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2020-10-27 01:10:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 480. [2020-10-27 01:10:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-27 01:10:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 529 transitions. [2020-10-27 01:10:04,698 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 529 transitions. Word has length 49 [2020-10-27 01:10:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:04,698 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 529 transitions. [2020-10-27 01:10:04,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:10:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 529 transitions. [2020-10-27 01:10:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:10:04,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:04,699 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:04,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-27 01:10:04,699 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:04,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2088275453, now seen corresponding path program 21 times [2020-10-27 01:10:04,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:04,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143212861] [2020-10-27 01:10:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:04,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:05,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:05,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:07,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:07,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:10:07,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3041 [2020-10-27 01:10:07,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:10:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:10:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:08,465 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-27 01:10:08,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:08,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:08,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:08,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:08,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:08,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:08,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:08,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:10:08,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143212861] [2020-10-27 01:10:08,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:08,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:10:08,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186058095] [2020-10-27 01:10:08,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:10:08,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:10:08,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:10:08,895 INFO L87 Difference]: Start difference. First operand 480 states and 529 transitions. Second operand 16 states. [2020-10-27 01:10:09,504 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 01:10:09,852 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-27 01:10:10,331 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 01:10:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:11,136 INFO L93 Difference]: Finished difference Result 598 states and 670 transitions. [2020-10-27 01:10:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:10:11,137 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 01:10:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:11,140 INFO L225 Difference]: With dead ends: 598 [2020-10-27 01:10:11,140 INFO L226 Difference]: Without dead ends: 578 [2020-10-27 01:10:11,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:10:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-10-27 01:10:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 490. [2020-10-27 01:10:11,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-27 01:10:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 542 transitions. [2020-10-27 01:10:11,212 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 542 transitions. Word has length 49 [2020-10-27 01:10:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:11,212 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 542 transitions. [2020-10-27 01:10:11,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:10:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 542 transitions. [2020-10-27 01:10:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:10:11,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:11,214 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-10-27 01:10:11,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-27 01:10:11,214 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:11,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:11,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1931932229, now seen corresponding path program 22 times [2020-10-27 01:10:11,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:11,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197685090] [2020-10-27 01:10:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:11,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:11,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:12,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking...