/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-queue-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:30:52,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:30:52,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:30:52,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:30:52,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:30:52,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:30:52,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:30:52,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:30:52,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:30:52,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:30:52,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:30:52,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:30:52,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:30:52,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:30:52,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:30:52,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:30:52,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:30:52,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:30:52,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:30:52,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:30:52,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:30:52,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:30:52,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:30:52,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:30:52,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:30:52,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:30:52,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:30:52,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:30:52,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:30:52,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:30:52,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:30:52,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:30:52,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:30:52,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:30:52,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:30:52,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:30:52,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:30:52,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:30:52,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:30:52,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:30:52,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:30:52,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:30:52,311 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:30:52,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:30:52,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:30:52,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:30:52,314 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:30:52,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:30:52,314 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:30:52,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:30:52,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:30:52,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:30:52,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:30:52,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:30:52,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:30:52,316 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:30:52,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:30:52,316 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:30:52,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:30:52,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:30:52,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:30:52,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:30:52,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:30:52,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:30:52,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:30:52,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:30:52,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:30:52,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:30:52,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:30:52,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:30:52,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:30:52,319 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:30:52,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:30:52,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:30:52,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:30:52,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:30:52,742 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:30:52,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-queue-1.i [2020-10-28 14:30:52,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34a1c8f0d/4cda6acfd68843868c2de5e68c605d13/FLAG4b16c407a [2020-10-28 14:30:53,662 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:30:53,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-queue-1.i [2020-10-28 14:30:53,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34a1c8f0d/4cda6acfd68843868c2de5e68c605d13/FLAG4b16c407a [2020-10-28 14:30:53,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34a1c8f0d/4cda6acfd68843868c2de5e68c605d13 [2020-10-28 14:30:53,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:30:53,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:30:53,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:30:53,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:30:53,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:30:53,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:30:53" (1/1) ... [2020-10-28 14:30:53,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e7cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:53, skipping insertion in model container [2020-10-28 14:30:53,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:30:53" (1/1) ... [2020-10-28 14:30:53,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:30:54,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:30:54,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:30:54,374 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:30:54,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:30:54,485 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:30:54,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54 WrapperNode [2020-10-28 14:30:54,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:30:54,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:30:54,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:30:54,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:30:54,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54" (1/1) ... [2020-10-28 14:30:54,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54" (1/1) ... [2020-10-28 14:30:54,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54" (1/1) ... [2020-10-28 14:30:54,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54" (1/1) ... [2020-10-28 14:30:54,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54" (1/1) ... [2020-10-28 14:30:54,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54" (1/1) ... [2020-10-28 14:30:54,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54" (1/1) ... [2020-10-28 14:30:54,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:30:54,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:30:54,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:30:54,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:30:54,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:30:54,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:30:54,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:30:54,696 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:30:54,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:30:54,696 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:30:54,696 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:30:54,696 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:30:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:30:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:30:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:30:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:30:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:30:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:30:54,698 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:30:54,698 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:30:54,698 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:30:54,698 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:30:54,698 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:30:54,698 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:30:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:30:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:30:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:30:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:30:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:30:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:30:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:30:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:30:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:30:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:30:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:30:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:30:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:30:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:30:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:30:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:30:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:30:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:30:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:30:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:30:54,702 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:30:54,702 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:30:54,702 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:30:54,702 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:30:54,702 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:30:54,702 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:30:54,702 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:30:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:30:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:30:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:30:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:30:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:30:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:30:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:30:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:30:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:30:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:30:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:30:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:30:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:30:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:30:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:30:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:30:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:30:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:30:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:30:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:30:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:30:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:30:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:30:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:30:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:30:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:30:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:30:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:30:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:30:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:30:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:30:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:30:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:30:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:30:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:30:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:30:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:30:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:30:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:30:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:30:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:30:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:30:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:30:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:30:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:30:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:30:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:30:54,710 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:30:54,710 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:30:54,710 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:30:54,710 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:30:54,710 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:30:54,710 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:30:54,710 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:30:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:30:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:30:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:30:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:30:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:30:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:30:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:30:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:30:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:30:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:30:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:30:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:30:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:30:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:30:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:30:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:30:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:30:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:30:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:30:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:30:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:30:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:30:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:30:55,433 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:30:55,434 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-10-28 14:30:55,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:30:55 BoogieIcfgContainer [2020-10-28 14:30:55,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:30:55,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:30:55,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:30:55,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:30:55,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:30:53" (1/3) ... [2020-10-28 14:30:55,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcf0c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:30:55, skipping insertion in model container [2020-10-28 14:30:55,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:54" (2/3) ... [2020-10-28 14:30:55,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcf0c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:30:55, skipping insertion in model container [2020-10-28 14:30:55,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:30:55" (3/3) ... [2020-10-28 14:30:55,447 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-queue-1.i [2020-10-28 14:30:55,460 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:30:55,466 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:30:55,481 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:30:55,511 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:30:55,512 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:30:55,512 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:30:55,512 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:30:55,512 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:30:55,512 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:30:55,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:30:55,513 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:30:55,537 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-10-28 14:30:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-28 14:30:55,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:55,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:55,546 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash 218866609, now seen corresponding path program 1 times [2020-10-28 14:30:55,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:55,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361730109] [2020-10-28 14:30:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:55,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:55,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:56,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:30:56,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:56,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-28 14:30:56,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:56,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:56,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:56,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:30:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:56,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:30:56,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:56,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:56,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:56,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:56,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:30:56,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:56,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:56,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:56,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:56,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:30:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:56,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361730109] [2020-10-28 14:30:56,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:56,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:30:56,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071822124] [2020-10-28 14:30:56,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:30:56,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:56,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:30:56,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:30:56,165 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2020-10-28 14:30:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:56,420 INFO L93 Difference]: Finished difference Result 168 states and 307 transitions. [2020-10-28 14:30:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:30:56,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-28 14:30:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:56,433 INFO L225 Difference]: With dead ends: 168 [2020-10-28 14:30:56,434 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:30:56,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:30:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:30:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 14:30:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:30:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2020-10-28 14:30:56,491 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 11 [2020-10-28 14:30:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:56,492 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2020-10-28 14:30:56,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:30:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2020-10-28 14:30:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:30:56,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:56,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:56,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:30:56,494 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:56,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash 794710855, now seen corresponding path program 1 times [2020-10-28 14:30:56,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:56,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120112679] [2020-10-28 14:30:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:56,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:56,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:30:56,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:56,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-28 14:30:56,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:56,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:56,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:30:56,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:56,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:30:56,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:56,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:56,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:56,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:56,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:30:56,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:56,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:56,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:56,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:56,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:56,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:56,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120112679] [2020-10-28 14:30:56,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:56,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:30:56,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85077490] [2020-10-28 14:30:56,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:30:56,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:30:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:56,691 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 4 states. [2020-10-28 14:30:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:56,888 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-10-28 14:30:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:30:56,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:30:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:56,890 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:30:56,890 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 14:30:56,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 14:30:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-28 14:30:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:30:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-28 14:30:56,903 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 12 [2020-10-28 14:30:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:56,904 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-28 14:30:56,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:30:56,904 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-28 14:30:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:30:56,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:56,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:56,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:30:56,905 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:56,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1246734287, now seen corresponding path program 1 times [2020-10-28 14:30:56,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:56,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66524055] [2020-10-28 14:30:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:57,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:30:57,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:57,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-28 14:30:57,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:57,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:30:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:30:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:30:57,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:57,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:57,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:57,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:57,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:57,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:30:57,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:57,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:57,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:57,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:57,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:57,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:57,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66524055] [2020-10-28 14:30:57,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:57,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:30:57,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214743573] [2020-10-28 14:30:57,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:30:57,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:57,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:30:57,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:57,149 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 4 states. [2020-10-28 14:30:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:57,304 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-28 14:30:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:30:57,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 14:30:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:57,306 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:30:57,306 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:30:57,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:30:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 14:30:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:30:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-28 14:30:57,317 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 15 [2020-10-28 14:30:57,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:57,318 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-28 14:30:57,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:30:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-28 14:30:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:30:57,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:57,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:57,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:30:57,320 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1069993799, now seen corresponding path program 1 times [2020-10-28 14:30:57,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:57,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327968307] [2020-10-28 14:30:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:57,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:30:57,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 14:30:57,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:57,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:30:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:30:57,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:57,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:57,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:57,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:57,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:57,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:30:57,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:57,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:57,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:57,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:57,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:57,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:57,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327968307] [2020-10-28 14:30:57,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:57,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:30:57,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469539020] [2020-10-28 14:30:57,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:30:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:30:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:57,436 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 4 states. [2020-10-28 14:30:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:57,583 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-28 14:30:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:30:57,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:30:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:57,585 INFO L225 Difference]: With dead ends: 146 [2020-10-28 14:30:57,585 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:30:57,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:30:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-28 14:30:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 14:30:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-28 14:30:57,596 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 18 [2020-10-28 14:30:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:57,597 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-28 14:30:57,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:30:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-28 14:30:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:30:57,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:57,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:57,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:30:57,598 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash 937711355, now seen corresponding path program 1 times [2020-10-28 14:30:57,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:57,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509717015] [2020-10-28 14:30:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:57,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:58,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:58,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:30:58,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:58,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-28 14:30:58,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:58,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:58,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:30:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:30:58,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:58,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:58,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:58,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:58,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:58,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:58,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:58,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:58,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:58,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:58,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509717015] [2020-10-28 14:30:58,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:58,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:30:58,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603116742] [2020-10-28 14:30:58,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:30:58,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:30:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:30:58,204 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 5 states. [2020-10-28 14:30:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:58,378 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2020-10-28 14:30:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:30:58,378 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 14:30:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:58,379 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:30:58,380 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:30:58,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:30:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:30:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-28 14:30:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:30:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-28 14:30:58,389 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 23 [2020-10-28 14:30:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:58,389 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-28 14:30:58,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:30:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-28 14:30:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:30:58,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:58,391 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:58,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:30:58,391 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash 309576248, now seen corresponding path program 1 times [2020-10-28 14:30:58,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:58,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268623763] [2020-10-28 14:30:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:58,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:58,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:58,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:30:58,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:58,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 14:30:58,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:58,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:30:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:30:58,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:58,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:58,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:58,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:58,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:58,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:58,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:58,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:58,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:58,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:58,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:58,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:58,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:58,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268623763] [2020-10-28 14:30:58,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:58,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:30:58,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461800518] [2020-10-28 14:30:58,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:30:58,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:58,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:30:58,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:30:58,640 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 7 states. [2020-10-28 14:30:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:58,933 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2020-10-28 14:30:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:30:58,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-28 14:30:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:58,935 INFO L225 Difference]: With dead ends: 130 [2020-10-28 14:30:58,936 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 14:30:58,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 14:30:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 84. [2020-10-28 14:30:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 14:30:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-28 14:30:58,956 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 25 [2020-10-28 14:30:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:58,957 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-28 14:30:58,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:30:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-28 14:30:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:30:58,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:58,959 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:58,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:30:58,960 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:58,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1376318958, now seen corresponding path program 1 times [2020-10-28 14:30:58,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:58,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773207223] [2020-10-28 14:30:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:58,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:59,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:30:59,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:59,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-28 14:30:59,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:59,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:30:59,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:30:59,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:30:59,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:59,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:59,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:59,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:59,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:59,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:30:59,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:59,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:59,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:59,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773207223] [2020-10-28 14:30:59,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:59,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:30:59,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130621581] [2020-10-28 14:30:59,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:30:59,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:30:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:59,340 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 4 states. [2020-10-28 14:30:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:59,510 INFO L93 Difference]: Finished difference Result 171 states and 215 transitions. [2020-10-28 14:30:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:30:59,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-28 14:30:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:59,512 INFO L225 Difference]: With dead ends: 171 [2020-10-28 14:30:59,512 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 14:30:59,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 14:30:59,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-28 14:30:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:30:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-10-28 14:30:59,536 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 26 [2020-10-28 14:30:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:59,537 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-10-28 14:30:59,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:30:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-10-28 14:30:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:30:59,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:59,539 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:59,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:30:59,540 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:59,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:59,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2123363362, now seen corresponding path program 1 times [2020-10-28 14:30:59,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:59,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117501483] [2020-10-28 14:30:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:59,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:30:59,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:59,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-28 14:30:59,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:59,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:59,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:30:59,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:30:59,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:30:59,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:59,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:59,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:59,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:59,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:59,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:59,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:59,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:59,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:59,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117501483] [2020-10-28 14:30:59,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:59,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:30:59,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741711546] [2020-10-28 14:30:59,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:30:59,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:59,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:30:59,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:59,968 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 4 states. [2020-10-28 14:31:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:00,171 INFO L93 Difference]: Finished difference Result 198 states and 247 transitions. [2020-10-28 14:31:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:31:00,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:31:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:00,175 INFO L225 Difference]: With dead ends: 198 [2020-10-28 14:31:00,175 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 14:31:00,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:31:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 14:31:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2020-10-28 14:31:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:31:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2020-10-28 14:31:00,191 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 30 [2020-10-28 14:31:00,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:00,191 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2020-10-28 14:31:00,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:31:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2020-10-28 14:31:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:31:00,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:00,196 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:00,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:31:00,196 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:00,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:00,197 INFO L82 PathProgramCache]: Analyzing trace with hash -84648472, now seen corresponding path program 1 times [2020-10-28 14:31:00,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:00,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415032811] [2020-10-28 14:31:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:00,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:00,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:00,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:00,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:31:00,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:00,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-28 14:31:00,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:00,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:00,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:31:00,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:31:00,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:31:00,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:00,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:00,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:00,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:00,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:00,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:31:00,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:00,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:00,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:00,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:00,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:31:00,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415032811] [2020-10-28 14:31:00,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:00,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:31:00,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755937074] [2020-10-28 14:31:00,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:31:00,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:00,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:31:00,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:31:00,629 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 4 states. [2020-10-28 14:31:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:00,860 INFO L93 Difference]: Finished difference Result 221 states and 274 transitions. [2020-10-28 14:31:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:31:00,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:31:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:00,862 INFO L225 Difference]: With dead ends: 221 [2020-10-28 14:31:00,862 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 14:31:00,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:31:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 14:31:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2020-10-28 14:31:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 14:31:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-10-28 14:31:00,880 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 33 [2020-10-28 14:31:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:00,880 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-10-28 14:31:00,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:31:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-10-28 14:31:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:31:00,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:00,883 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:00,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:31:00,884 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2040254526, now seen corresponding path program 1 times [2020-10-28 14:31:00,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:00,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112315998] [2020-10-28 14:31:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:00,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:01,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:01,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:31:01,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:01,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-28 14:31:01,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:01,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:01,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:31:01,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:01,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:31:01,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:01,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:01,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:01,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:01,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:01,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:01,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:01,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:01,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:01,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:01,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:01,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:01,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:01,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112315998] [2020-10-28 14:31:01,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:01,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:31:01,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585042961] [2020-10-28 14:31:01,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:31:01,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:31:01,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:01,303 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand 8 states. [2020-10-28 14:31:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:01,583 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-10-28 14:31:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:31:01,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 14:31:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:01,587 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:31:01,587 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 14:31:01,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 14:31:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-28 14:31:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 14:31:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-28 14:31:01,601 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 34 [2020-10-28 14:31:01,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:01,603 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-28 14:31:01,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:31:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-28 14:31:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:31:01,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:01,605 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:01,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:31:01,605 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1668646551, now seen corresponding path program 1 times [2020-10-28 14:31:01,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:01,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307184518] [2020-10-28 14:31:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:01,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:01,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:31:01,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:01,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-28 14:31:01,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:01,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:31:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:31:01,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:01,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:01,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:02,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:02,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:02,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:31:02,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:02,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:02,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:02,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:02,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307184518] [2020-10-28 14:31:02,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:02,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:31:02,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805576093] [2020-10-28 14:31:02,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:31:02,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:02,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:31:02,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:02,022 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 8 states. [2020-10-28 14:31:02,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:02,428 INFO L93 Difference]: Finished difference Result 157 states and 185 transitions. [2020-10-28 14:31:02,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:02,429 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-28 14:31:02,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:02,430 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:31:02,430 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 14:31:02,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 14:31:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 130. [2020-10-28 14:31:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 14:31:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2020-10-28 14:31:02,441 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 35 [2020-10-28 14:31:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:02,442 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2020-10-28 14:31:02,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:31:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2020-10-28 14:31:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:31:02,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:02,443 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:02,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:31:02,443 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1242507287, now seen corresponding path program 1 times [2020-10-28 14:31:02,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:02,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454801605] [2020-10-28 14:31:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:02,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:31:02,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:02,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-28 14:31:02,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:02,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:02,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:31:02,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:02,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:31:02,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:31:02,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:02,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:02,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:02,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:02,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:02,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:02,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:02,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:02,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454801605] [2020-10-28 14:31:02,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:02,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:31:02,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418406353] [2020-10-28 14:31:02,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:31:02,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:31:02,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:02,864 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand 8 states. [2020-10-28 14:31:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:03,249 INFO L93 Difference]: Finished difference Result 169 states and 197 transitions. [2020-10-28 14:31:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:31:03,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-28 14:31:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:03,251 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:31:03,251 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 14:31:03,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 14:31:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2020-10-28 14:31:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 14:31:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2020-10-28 14:31:03,262 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 37 [2020-10-28 14:31:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:03,262 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2020-10-28 14:31:03,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:31:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2020-10-28 14:31:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:31:03,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:03,263 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:03,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:31:03,264 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash -28871154, now seen corresponding path program 1 times [2020-10-28 14:31:03,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:03,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638249146] [2020-10-28 14:31:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:03,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:03,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:31:03,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:03,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-28 14:31:03,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:03,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:03,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:31:03,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:31:03,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:31:03,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:03,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:03,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:03,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:03,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:03,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:03,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:03,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:03,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 14:31:03,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638249146] [2020-10-28 14:31:03,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:03,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:31:03,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224196221] [2020-10-28 14:31:03,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:31:03,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:31:03,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:31:03,767 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand 4 states. [2020-10-28 14:31:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:03,980 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2020-10-28 14:31:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:31:03,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 14:31:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:03,981 INFO L225 Difference]: With dead ends: 211 [2020-10-28 14:31:03,981 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 14:31:03,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:31:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 14:31:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-10-28 14:31:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:31:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2020-10-28 14:31:03,993 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 42 [2020-10-28 14:31:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:03,993 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2020-10-28 14:31:03,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:31:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2020-10-28 14:31:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:31:03,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:03,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:03,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:31:03,995 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:03,996 INFO L82 PathProgramCache]: Analyzing trace with hash 989426657, now seen corresponding path program 1 times [2020-10-28 14:31:03,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:04,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905299473] [2020-10-28 14:31:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:04,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:04,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:31:04,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:31:04,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-28 14:31:04,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:04,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:04,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:31:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:31:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:31:04,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:05,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:05,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:05,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:05,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:05,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:05,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:05,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:05,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:05,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905299473] [2020-10-28 14:31:05,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:05,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:31:05,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841727804] [2020-10-28 14:31:05,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:31:05,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:31:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:31:05,094 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 5 states. [2020-10-28 14:31:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:05,302 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2020-10-28 14:31:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:31:05,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-28 14:31:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:05,304 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:31:05,304 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:31:05,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:31:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:31:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-28 14:31:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:31:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-28 14:31:05,313 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 43 [2020-10-28 14:31:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:05,313 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-28 14:31:05,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:31:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-28 14:31:05,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:31:05,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:05,314 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:05,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:31:05,314 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:05,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:05,315 INFO L82 PathProgramCache]: Analyzing trace with hash 402620643, now seen corresponding path program 1 times [2020-10-28 14:31:05,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:05,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632262489] [2020-10-28 14:31:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:05,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:05,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:05,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:31:05,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:05,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 14:31:05,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:05,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:05,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:31:05,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:05,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:31:05,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:05,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:05,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:05,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:05,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:05,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:05,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:05,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:05,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:05,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:05,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632262489] [2020-10-28 14:31:05,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:05,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:05,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801396016] [2020-10-28 14:31:05,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:05,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:05,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:05,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:05,645 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2020-10-28 14:31:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:05,999 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-10-28 14:31:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:31:06,000 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-28 14:31:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:06,001 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:31:06,001 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:31:06,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:31:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 14:31:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:31:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-28 14:31:06,008 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 43 [2020-10-28 14:31:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:06,008 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-28 14:31:06,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-28 14:31:06,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:31:06,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:06,009 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:06,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:31:06,009 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:06,010 INFO L82 PathProgramCache]: Analyzing trace with hash -579609298, now seen corresponding path program 1 times [2020-10-28 14:31:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:06,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816210243] [2020-10-28 14:31:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:06,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:06,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:06,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:31:06,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:06,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-28 14:31:06,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:06,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:06,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:31:06,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:06,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:31:06,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:06,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:06,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:06,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:06,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:06,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:06,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:06,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:06,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:06,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:06,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:06,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:06,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:31:06,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816210243] [2020-10-28 14:31:06,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:06,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:31:06,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193765893] [2020-10-28 14:31:06,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:31:06,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:06,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:31:06,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:06,454 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 8 states. [2020-10-28 14:31:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:06,735 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-28 14:31:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:31:06,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-28 14:31:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:06,736 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:31:06,736 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 14:31:06,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 14:31:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-28 14:31:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:31:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-28 14:31:06,743 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 44 [2020-10-28 14:31:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:06,743 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-28 14:31:06,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:31:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-28 14:31:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:31:06,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:06,744 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:06,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:31:06,745 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:06,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1664297424, now seen corresponding path program 1 times [2020-10-28 14:31:06,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:06,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797151155] [2020-10-28 14:31:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:06,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:07,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:07,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:31:07,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:07,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-28 14:31:07,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:07,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:07,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:31:07,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:07,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:31:07,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:07,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:07,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:07,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:07,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:07,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:07,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:07,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:07,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:07,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:07,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797151155] [2020-10-28 14:31:07,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:07,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:07,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130710409] [2020-10-28 14:31:07,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:07,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:07,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:07,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:07,424 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 10 states. [2020-10-28 14:31:07,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:07,859 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-10-28 14:31:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:31:07,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-28 14:31:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:07,861 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:31:07,861 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:31:07,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:31:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-28 14:31:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:31:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-28 14:31:07,872 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 46 [2020-10-28 14:31:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:07,873 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-28 14:31:07,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-28 14:31:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:31:07,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:07,874 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:07,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:31:07,874 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash -501133880, now seen corresponding path program 1 times [2020-10-28 14:31:07,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:07,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576747390] [2020-10-28 14:31:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:07,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:07,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:08,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:08,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:31:08,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:08,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-28 14:31:08,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:08,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:31:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:31:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:31:08,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:08,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:08,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:08,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:08,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:08,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:08,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:08,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:08,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:08,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:08,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:08,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:08,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 14:31:08,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576747390] [2020-10-28 14:31:08,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:08,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:31:08,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168149922] [2020-10-28 14:31:08,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:31:08,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:08,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:31:08,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:31:08,486 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 4 states. [2020-10-28 14:31:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:08,674 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-10-28 14:31:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:31:08,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-28 14:31:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:08,675 INFO L225 Difference]: With dead ends: 112 [2020-10-28 14:31:08,676 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:31:08,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:31:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:31:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-28 14:31:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:31:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-10-28 14:31:08,683 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 47 [2020-10-28 14:31:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:08,684 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-10-28 14:31:08,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:31:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-10-28 14:31:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:31:08,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:08,684 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:08,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:31:08,685 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1666759241, now seen corresponding path program 1 times [2020-10-28 14:31:08,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:08,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125344822] [2020-10-28 14:31:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:08,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:08,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:08,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:31:08,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:08,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 14:31:08,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:08,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:08,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:31:08,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:08,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:31:08,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:09,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:09,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:09,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:09,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:09,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:09,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:09,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:09,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:09,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:09,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125344822] [2020-10-28 14:31:09,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:09,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:09,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146258503] [2020-10-28 14:31:09,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:09,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:09,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:09,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:09,152 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 9 states. [2020-10-28 14:31:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:09,437 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-28 14:31:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:31:09,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-28 14:31:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:09,439 INFO L225 Difference]: With dead ends: 90 [2020-10-28 14:31:09,439 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 14:31:09,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 14:31:09,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-28 14:31:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 14:31:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-28 14:31:09,451 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 47 [2020-10-28 14:31:09,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:09,451 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-28 14:31:09,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-28 14:31:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:31:09,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:09,452 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:09,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:31:09,453 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash -127104064, now seen corresponding path program 1 times [2020-10-28 14:31:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:09,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233736470] [2020-10-28 14:31:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:09,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:09,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:09,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:31:09,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:09,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-28 14:31:09,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:09,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:09,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:31:09,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:09,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:31:09,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:10,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:10,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:10,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:10,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:10,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:10,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:10,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:10,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:10,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:10,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:10,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:10,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233736470] [2020-10-28 14:31:10,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:10,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:10,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662370601] [2020-10-28 14:31:10,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:10,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:10,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:10,076 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 9 states. [2020-10-28 14:31:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:10,522 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2020-10-28 14:31:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:31:10,522 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-28 14:31:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:10,524 INFO L225 Difference]: With dead ends: 129 [2020-10-28 14:31:10,524 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:31:10,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:31:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-10-28 14:31:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:31:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2020-10-28 14:31:10,533 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 50 [2020-10-28 14:31:10,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:10,534 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2020-10-28 14:31:10,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2020-10-28 14:31:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:31:10,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:10,535 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:10,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:31:10,535 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:10,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2035219383, now seen corresponding path program 1 times [2020-10-28 14:31:10,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:10,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560033051] [2020-10-28 14:31:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:10,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:10,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:31:10,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:10,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-28 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:31:10,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:11,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:11,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:11,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:11,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:11,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:11,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:11,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:11,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:11,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:11,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:11,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560033051] [2020-10-28 14:31:11,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:11,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:11,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355435915] [2020-10-28 14:31:11,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:11,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:11,203 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand 9 states. [2020-10-28 14:31:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:11,685 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-28 14:31:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:31:11,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-28 14:31:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:11,688 INFO L225 Difference]: With dead ends: 128 [2020-10-28 14:31:11,688 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 14:31:11,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:11,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 14:31:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2020-10-28 14:31:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 14:31:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-28 14:31:11,698 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 53 [2020-10-28 14:31:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:11,699 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-28 14:31:11,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-28 14:31:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:31:11,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:11,700 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:11,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:31:11,700 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:11,700 INFO L82 PathProgramCache]: Analyzing trace with hash -981588100, now seen corresponding path program 1 times [2020-10-28 14:31:11,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:11,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143054212] [2020-10-28 14:31:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:11,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:12,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:12,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:31:12,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:12,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-28 14:31:12,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:12,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:12,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:31:12,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:12,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:31:12,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:12,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:12,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:12,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:12,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:12,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:12,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:12,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:12,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:12,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:12,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:12,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:12,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:12,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143054212] [2020-10-28 14:31:12,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:12,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:12,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241292065] [2020-10-28 14:31:12,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:12,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:12,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:12,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:12,363 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 10 states. [2020-10-28 14:31:12,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:12,830 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-28 14:31:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:12,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-28 14:31:12,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:12,832 INFO L225 Difference]: With dead ends: 136 [2020-10-28 14:31:12,832 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 14:31:12,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 14:31:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2020-10-28 14:31:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 14:31:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-28 14:31:12,843 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 54 [2020-10-28 14:31:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:12,843 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-28 14:31:12,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-28 14:31:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:31:12,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:12,845 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1] [2020-10-28 14:31:12,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:31:12,845 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2141977510, now seen corresponding path program 2 times [2020-10-28 14:31:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:12,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815514605] [2020-10-28 14:31:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:12,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:13,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:13,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:31:13,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:13,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-28 14:31:13,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:13,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 14:31:13,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:13,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:13,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:13,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:13,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:13,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:13,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:13,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:13,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:13,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:13,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:13,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:13,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:13,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815514605] [2020-10-28 14:31:13,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:13,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:13,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145610624] [2020-10-28 14:31:13,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:13,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:13,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:13,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:13,617 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-10-28 14:31:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:14,083 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-10-28 14:31:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:31:14,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-28 14:31:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:14,085 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:31:14,085 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:31:14,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:31:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2020-10-28 14:31:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 14:31:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-28 14:31:14,096 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 59 [2020-10-28 14:31:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:14,096 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-28 14:31:14,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-28 14:31:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:31:14,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:14,097 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:14,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:31:14,097 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash 999069460, now seen corresponding path program 1 times [2020-10-28 14:31:14,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:14,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252312998] [2020-10-28 14:31:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:14,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:14,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:14,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:31:14,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:14,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-28 14:31:14,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:14,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 14:31:14,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:14,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:14,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:14,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:14,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:14,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:14,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:14,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:14,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:14,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:14,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:14,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:14,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:14,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252312998] [2020-10-28 14:31:14,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:14,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:14,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192048919] [2020-10-28 14:31:14,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:14,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:14,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:14,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:14,792 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 11 states. [2020-10-28 14:31:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:15,196 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-10-28 14:31:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:31:15,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-28 14:31:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:15,198 INFO L225 Difference]: With dead ends: 132 [2020-10-28 14:31:15,198 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 14:31:15,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 14:31:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-10-28 14:31:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 14:31:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-28 14:31:15,209 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 61 [2020-10-28 14:31:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:15,209 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-28 14:31:15,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-28 14:31:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:31:15,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:15,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:15,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:31:15,211 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:15,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:15,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1486843080, now seen corresponding path program 2 times [2020-10-28 14:31:15,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:15,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442776349] [2020-10-28 14:31:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:15,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:15,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:15,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:31:15,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:15,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-28 14:31:15,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:15,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:31:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:31:15,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:15,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:15,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:15,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:15,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:15,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:15,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:15,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:15,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:15,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:15,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442776349] [2020-10-28 14:31:15,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:15,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:15,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017920999] [2020-10-28 14:31:15,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:15,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:15,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:15,851 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 11 states. [2020-10-28 14:31:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:16,417 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2020-10-28 14:31:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:16,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-28 14:31:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:16,418 INFO L225 Difference]: With dead ends: 142 [2020-10-28 14:31:16,418 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:31:16,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:31:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:31:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-28 14:31:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:31:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-28 14:31:16,427 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 62 [2020-10-28 14:31:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:16,427 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-28 14:31:16,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-28 14:31:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:31:16,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:16,428 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:16,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:31:16,428 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:16,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash -667120273, now seen corresponding path program 2 times [2020-10-28 14:31:16,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:16,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326914357] [2020-10-28 14:31:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:16,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:31:16,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-28 14:31:16,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:16,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:31:16,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:17,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:17,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:17,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:17,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:17,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:17,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:17,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:17,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:17,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:17,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:17,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:17,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:17,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326914357] [2020-10-28 14:31:17,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:17,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:31:17,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81538749] [2020-10-28 14:31:17,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:31:17,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:17,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:31:17,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:31:17,432 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 11 states. [2020-10-28 14:31:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:18,044 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2020-10-28 14:31:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:31:18,045 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-28 14:31:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:18,046 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:31:18,046 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 14:31:18,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 14:31:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2020-10-28 14:31:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:31:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-28 14:31:18,055 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 62 [2020-10-28 14:31:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:18,056 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-28 14:31:18,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:31:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-28 14:31:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:31:18,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:18,057 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:18,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:31:18,057 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1787771808, now seen corresponding path program 1 times [2020-10-28 14:31:18,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:18,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335632528] [2020-10-28 14:31:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:18,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:18,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:18,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:31:18,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:18,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-28 14:31:18,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:18,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:18,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:18,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:18,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 14:31:18,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:18,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:18,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:18,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:18,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:18,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:18,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:18,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:18,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:18,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:18,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:18,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335632528] [2020-10-28 14:31:18,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:18,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:18,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142107731] [2020-10-28 14:31:18,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:18,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:18,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:18,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:18,999 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 12 states. [2020-10-28 14:31:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:19,564 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2020-10-28 14:31:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:31:19,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-28 14:31:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:19,566 INFO L225 Difference]: With dead ends: 156 [2020-10-28 14:31:19,566 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 14:31:19,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:19,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 14:31:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2020-10-28 14:31:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 14:31:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2020-10-28 14:31:19,578 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 69 [2020-10-28 14:31:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:19,578 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2020-10-28 14:31:19,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2020-10-28 14:31:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 14:31:19,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:19,580 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:19,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:31:19,580 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:19,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:19,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1551765751, now seen corresponding path program 3 times [2020-10-28 14:31:19,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:19,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315399674] [2020-10-28 14:31:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:20,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:20,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 14:31:20,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-28 14:31:20,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:20,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:20,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:20,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:20,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 14:31:20,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:20,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:20,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:20,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:20,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:20,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:20,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:20,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:20,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:20,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:20,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:20,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:20,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:20,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315399674] [2020-10-28 14:31:20,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:20,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:20,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360709539] [2020-10-28 14:31:20,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:20,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:20,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:20,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:20,855 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 12 states. [2020-10-28 14:31:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:21,486 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2020-10-28 14:31:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:31:21,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-28 14:31:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:21,493 INFO L225 Difference]: With dead ends: 138 [2020-10-28 14:31:21,494 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 14:31:21,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 14:31:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 107. [2020-10-28 14:31:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:31:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-28 14:31:21,510 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 71 [2020-10-28 14:31:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:21,511 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-28 14:31:21,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-28 14:31:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 14:31:21,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:21,512 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:21,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:31:21,512 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash -685185620, now seen corresponding path program 2 times [2020-10-28 14:31:21,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:21,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457865890] [2020-10-28 14:31:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:21,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:22,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 14:31:22,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:22,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-28 14:31:22,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:22,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:31:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 14:31:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:31:22,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:22,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:22,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:22,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:22,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:22,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:22,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:22,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:22,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:22,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:22,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:22,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:22,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 14:31:22,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457865890] [2020-10-28 14:31:22,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:22,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:22,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107313550] [2020-10-28 14:31:22,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:22,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:22,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:22,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:22,871 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 9 states. [2020-10-28 14:31:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:23,232 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2020-10-28 14:31:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:31:23,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-28 14:31:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:23,233 INFO L225 Difference]: With dead ends: 136 [2020-10-28 14:31:23,233 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 14:31:23,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 14:31:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-10-28 14:31:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 14:31:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-28 14:31:23,249 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 77 [2020-10-28 14:31:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:23,249 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-28 14:31:23,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-28 14:31:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 14:31:23,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:23,253 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:23,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:31:23,253 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1375814022, now seen corresponding path program 3 times [2020-10-28 14:31:23,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:23,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139635383] [2020-10-28 14:31:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:23,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:23,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 14:31:23,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:23,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-28 14:31:23,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:23,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 14:31:23,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:24,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:24,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:24,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:24,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:24,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:24,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:31:24,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:24,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:24,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:24,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139635383] [2020-10-28 14:31:24,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:24,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:24,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026536386] [2020-10-28 14:31:24,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:24,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:24,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:24,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:24,423 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 13 states. [2020-10-28 14:31:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:24,938 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-10-28 14:31:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:31:24,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-10-28 14:31:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:24,940 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:31:24,940 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:31:24,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:31:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 86. [2020-10-28 14:31:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 14:31:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-28 14:31:24,956 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 78 [2020-10-28 14:31:24,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:24,956 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-28 14:31:24,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-28 14:31:24,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 14:31:24,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:24,957 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:24,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:31:24,957 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:24,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1216283912, now seen corresponding path program 4 times [2020-10-28 14:31:24,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:24,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621557418] [2020-10-28 14:31:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:25,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:25,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 14:31:25,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:25,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-28 14:31:25,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:25,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:25,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:25,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:25,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 14:31:25,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:25,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:25,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:25,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:25,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:25,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:25,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:25,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:25,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:25,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:25,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:25,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:25,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:25,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621557418] [2020-10-28 14:31:25,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:25,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:25,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144238662] [2020-10-28 14:31:25,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:25,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:25,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:25,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:25,965 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 13 states. [2020-10-28 14:31:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:26,738 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-28 14:31:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:31:26,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-10-28 14:31:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:26,740 INFO L225 Difference]: With dead ends: 153 [2020-10-28 14:31:26,741 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:31:26,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:31:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:31:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-28 14:31:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 14:31:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-28 14:31:26,750 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 85 [2020-10-28 14:31:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:26,750 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-28 14:31:26,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-28 14:31:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 14:31:26,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:26,751 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:26,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:31:26,752 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1051618334, now seen corresponding path program 5 times [2020-10-28 14:31:26,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:26,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783895674] [2020-10-28 14:31:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:26,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:27,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:27,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:31:27,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:27,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-28 14:31:27,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:27,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:31:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 14:31:27,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:28,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:28,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:28,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:28,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:28,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:28,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:28,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:28,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:28,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:28,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:28,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:28,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783895674] [2020-10-28 14:31:28,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:28,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:28,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782979800] [2020-10-28 14:31:28,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:28,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:28,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:28,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:28,323 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 14 states. [2020-10-28 14:31:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:29,310 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2020-10-28 14:31:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:29,310 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 94 [2020-10-28 14:31:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:29,312 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:31:29,312 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 14:31:29,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 14:31:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-28 14:31:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 14:31:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-10-28 14:31:29,326 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 94 [2020-10-28 14:31:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:29,326 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-10-28 14:31:29,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:29,326 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-10-28 14:31:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 14:31:29,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:29,327 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:29,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:31:29,328 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:29,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1566970006, now seen corresponding path program 6 times [2020-10-28 14:31:29,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:29,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717332483] [2020-10-28 14:31:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:29,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:30,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:30,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 14:31:30,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:30,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-28 14:31:30,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:30,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:30,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:31:30,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:30,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 14:31:30,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:30,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:30,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:30,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:30,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:30,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:30,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:30,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:30,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:30,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:30,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:30,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:30,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:30,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717332483] [2020-10-28 14:31:30,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:30,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:31:30,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055946933] [2020-10-28 14:31:30,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:31:30,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:30,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:31:30,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:30,982 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 15 states. [2020-10-28 14:31:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:32,093 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2020-10-28 14:31:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:31:32,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 102 [2020-10-28 14:31:32,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:32,095 INFO L225 Difference]: With dead ends: 170 [2020-10-28 14:31:32,096 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 14:31:32,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:31:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 14:31:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-28 14:31:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 14:31:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-28 14:31:32,107 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2020-10-28 14:31:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:32,107 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-28 14:31:32,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:31:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-28 14:31:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 14:31:32,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:32,108 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:32,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:31:32,109 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:32,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:32,109 INFO L82 PathProgramCache]: Analyzing trace with hash 670492088, now seen corresponding path program 7 times [2020-10-28 14:31:32,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:32,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191179422] [2020-10-28 14:31:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:32,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:33,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:33,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 14:31:33,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:33,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1198 [2020-10-28 14:31:33,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:33,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:33,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:31:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 14:31:33,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:34,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:34,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:34,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:34,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:34,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:34,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:34,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:34,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:34,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:34,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:34,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:34,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191179422] [2020-10-28 14:31:34,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:34,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:31:34,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386703841] [2020-10-28 14:31:34,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:31:34,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:34,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:31:34,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:34,224 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-10-28 14:31:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:35,394 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2020-10-28 14:31:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:31:35,395 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 103 [2020-10-28 14:31:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:35,397 INFO L225 Difference]: With dead ends: 178 [2020-10-28 14:31:35,397 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 14:31:35,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:31:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 14:31:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 141. [2020-10-28 14:31:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 14:31:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-10-28 14:31:35,411 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 103 [2020-10-28 14:31:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:35,412 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-10-28 14:31:35,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:31:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-10-28 14:31:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 14:31:35,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:35,413 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:35,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:31:35,413 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:35,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1300508420, now seen corresponding path program 8 times [2020-10-28 14:31:35,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:35,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110130011] [2020-10-28 14:31:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:35,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:36,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:36,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 14:31:36,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:36,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1347 [2020-10-28 14:31:36,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:36,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:31:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 14:31:36,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:37,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:37,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:37,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:37,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:31:37,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:37,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:37,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:37,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:37,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:37,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:37,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110130011] [2020-10-28 14:31:37,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:37,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:31:37,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104440245] [2020-10-28 14:31:37,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:31:37,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:37,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:31:37,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:37,818 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 16 states. [2020-10-28 14:31:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:39,149 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2020-10-28 14:31:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:31:39,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-28 14:31:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:39,151 INFO L225 Difference]: With dead ends: 186 [2020-10-28 14:31:39,152 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 14:31:39,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:31:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 14:31:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2020-10-28 14:31:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 14:31:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-10-28 14:31:39,167 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 111 [2020-10-28 14:31:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:39,168 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-10-28 14:31:39,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:31:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-10-28 14:31:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 14:31:39,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:39,169 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:39,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:31:39,169 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:39,170 INFO L82 PathProgramCache]: Analyzing trace with hash -631989922, now seen corresponding path program 9 times [2020-10-28 14:31:39,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:39,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289991997] [2020-10-28 14:31:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:39,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:40,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:40,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 14:31:40,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:40,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-28 14:31:40,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:40,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:40,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:31:40,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:40,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 14:31:40,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:41,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:41,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:41,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:41,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:41,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:41,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:41,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:41,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:41,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289991997] [2020-10-28 14:31:41,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:41,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:31:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874437595] [2020-10-28 14:31:41,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:31:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:31:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:31:41,424 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 17 states. [2020-10-28 14:31:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:42,681 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2020-10-28 14:31:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:31:42,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-28 14:31:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:42,684 INFO L225 Difference]: With dead ends: 245 [2020-10-28 14:31:42,684 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 14:31:42,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:31:42,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 14:31:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-10-28 14:31:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-28 14:31:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2020-10-28 14:31:42,703 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 112 [2020-10-28 14:31:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:42,703 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2020-10-28 14:31:42,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:31:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2020-10-28 14:31:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 14:31:42,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:42,705 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:42,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:31:42,705 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:42,706 INFO L82 PathProgramCache]: Analyzing trace with hash 503934032, now seen corresponding path program 10 times [2020-10-28 14:31:42,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:42,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278434542] [2020-10-28 14:31:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:42,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:44,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:44,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 14:31:44,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:44,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-28 14:31:44,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:44,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:31:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:31:44,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:44,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:44,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:44,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:44,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:44,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:44,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:44,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:44,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:44,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:44,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:44,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:44,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 20 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:44,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278434542] [2020-10-28 14:31:44,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:44,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:31:44,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007371005] [2020-10-28 14:31:44,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:31:44,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:44,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:31:44,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:31:44,966 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand 17 states. [2020-10-28 14:31:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:46,458 INFO L93 Difference]: Finished difference Result 224 states and 227 transitions. [2020-10-28 14:31:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:31:46,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 119 [2020-10-28 14:31:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:46,460 INFO L225 Difference]: With dead ends: 224 [2020-10-28 14:31:46,460 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:31:46,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:31:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:31:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-28 14:31:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 14:31:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-28 14:31:46,473 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 119 [2020-10-28 14:31:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:46,473 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-28 14:31:46,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:31:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-28 14:31:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 14:31:46,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:46,475 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:46,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:31:46,475 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:46,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1356782762, now seen corresponding path program 11 times [2020-10-28 14:31:46,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:46,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488422972] [2020-10-28 14:31:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:48,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:48,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 14:31:48,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:48,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1611 [2020-10-28 14:31:48,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:48,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:48,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:31:48,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:48,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 14:31:48,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:48,692 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-28 14:31:48,826 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-28 14:31:49,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:49,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:49,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:49,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:49,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:49,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:31:49,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:49,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:49,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:49,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488422972] [2020-10-28 14:31:49,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:49,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:31:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160464059] [2020-10-28 14:31:49,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:31:49,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:49,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:31:49,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:31:49,328 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 18 states. [2020-10-28 14:31:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:50,957 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2020-10-28 14:31:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:31:50,958 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-10-28 14:31:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:50,960 INFO L225 Difference]: With dead ends: 195 [2020-10-28 14:31:50,960 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 14:31:50,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:31:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 14:31:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 158. [2020-10-28 14:31:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 14:31:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-28 14:31:50,976 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 120 [2020-10-28 14:31:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:50,976 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-28 14:31:50,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:31:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-28 14:31:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 14:31:50,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:50,978 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:50,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:31:50,978 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1112514680, now seen corresponding path program 12 times [2020-10-28 14:31:50,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:50,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71824879] [2020-10-28 14:31:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:51,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:52,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:52,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 14:31:52,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:52,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1624 [2020-10-28 14:31:52,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:52,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:52,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:31:52,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:52,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 14:31:52,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:53,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:53,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:53,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:53,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:53,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:53,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:53,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:53,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:53,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:53,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:53,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:53,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71824879] [2020-10-28 14:31:53,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:53,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:31:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307148933] [2020-10-28 14:31:53,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:31:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:31:53,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:31:53,837 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 18 states. [2020-10-28 14:31:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:55,068 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2020-10-28 14:31:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:31:55,069 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-10-28 14:31:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:55,070 INFO L225 Difference]: With dead ends: 194 [2020-10-28 14:31:55,070 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 14:31:55,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:31:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 14:31:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2020-10-28 14:31:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 14:31:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-28 14:31:55,088 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 121 [2020-10-28 14:31:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:55,088 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-28 14:31:55,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:31:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-28 14:31:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 14:31:55,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:55,089 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:55,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:31:55,090 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1966664714, now seen corresponding path program 13 times [2020-10-28 14:31:55,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:55,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218012746] [2020-10-28 14:31:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:55,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:56,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:56,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 14:31:56,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:56,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-28 14:31:56,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:56,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:56,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:31:56,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 14:31:56,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:57,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:57,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:57,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:57,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:57,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:57,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:57,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:57,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:57,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218012746] [2020-10-28 14:31:57,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:57,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:31:57,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886169876] [2020-10-28 14:31:57,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:31:57,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:57,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:31:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:31:57,957 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 18 states. [2020-10-28 14:31:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:59,922 INFO L93 Difference]: Finished difference Result 211 states and 214 transitions. [2020-10-28 14:31:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:31:59,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 128 [2020-10-28 14:31:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:59,929 INFO L225 Difference]: With dead ends: 211 [2020-10-28 14:31:59,929 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 14:31:59,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:31:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 14:31:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 166. [2020-10-28 14:31:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 14:31:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-28 14:31:59,948 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 128 [2020-10-28 14:31:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:59,949 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-28 14:31:59,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:31:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-28 14:31:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 14:31:59,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:59,950 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:59,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:31:59,950 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:59,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2077632964, now seen corresponding path program 14 times [2020-10-28 14:31:59,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:59,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599852774] [2020-10-28 14:31:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:00,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:01,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:01,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 14:32:01,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:01,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-28 14:32:01,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:01,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:01,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:32:01,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:01,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 14:32:01,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:02,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:02,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:02,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:02,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:02,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:02,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:02,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:02,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:02,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:02,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:02,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:02,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:03,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599852774] [2020-10-28 14:32:03,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:03,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:32:03,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91724303] [2020-10-28 14:32:03,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:32:03,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:32:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:32:03,156 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 19 states. [2020-10-28 14:32:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:04,681 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2020-10-28 14:32:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:32:04,681 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 129 [2020-10-28 14:32:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:04,683 INFO L225 Difference]: With dead ends: 210 [2020-10-28 14:32:04,684 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 14:32:04,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:32:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 14:32:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 166. [2020-10-28 14:32:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 14:32:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-28 14:32:04,703 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 129 [2020-10-28 14:32:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:04,704 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-28 14:32:04,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:32:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-28 14:32:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 14:32:04,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:04,705 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:04,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:32:04,705 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:04,706 INFO L82 PathProgramCache]: Analyzing trace with hash 349781826, now seen corresponding path program 15 times [2020-10-28 14:32:04,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:04,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303574407] [2020-10-28 14:32:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:04,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:06,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:06,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 14:32:06,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:06,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1734 [2020-10-28 14:32:06,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:06,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:06,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:32:06,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:06,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 14:32:06,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:07,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:07,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:07,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:07,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:07,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:07,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:07,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:07,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:07,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:07,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 24 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:07,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303574407] [2020-10-28 14:32:07,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:07,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:32:07,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644429237] [2020-10-28 14:32:07,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:32:07,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:32:07,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:32:07,529 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 19 states. [2020-10-28 14:32:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:09,522 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2020-10-28 14:32:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:09,522 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 136 [2020-10-28 14:32:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:09,524 INFO L225 Difference]: With dead ends: 220 [2020-10-28 14:32:09,524 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 14:32:09,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:32:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 14:32:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-28 14:32:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 14:32:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2020-10-28 14:32:09,540 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 136 [2020-10-28 14:32:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:09,540 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2020-10-28 14:32:09,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:32:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2020-10-28 14:32:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 14:32:09,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:09,542 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:09,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:32:09,542 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:09,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:09,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1930733328, now seen corresponding path program 16 times [2020-10-28 14:32:09,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:09,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266491998] [2020-10-28 14:32:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:09,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:11,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:11,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 14:32:11,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:11,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-28 14:32:11,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:11,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:11,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:32:11,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:11,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 14:32:11,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:12,024 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-28 14:32:12,187 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-28 14:32:12,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:12,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:12,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:12,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:12,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:12,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:12,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:12,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:12,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:12,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:12,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:12,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:12,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266491998] [2020-10-28 14:32:12,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:12,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:32:12,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733979972] [2020-10-28 14:32:12,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:32:12,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:12,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:32:12,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:12,879 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 20 states. [2020-10-28 14:32:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:14,748 INFO L93 Difference]: Finished difference Result 228 states and 231 transitions. [2020-10-28 14:32:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:32:14,748 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2020-10-28 14:32:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:14,750 INFO L225 Difference]: With dead ends: 228 [2020-10-28 14:32:14,750 INFO L226 Difference]: Without dead ends: 224 [2020-10-28 14:32:14,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:32:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-28 14:32:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 175. [2020-10-28 14:32:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-28 14:32:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-10-28 14:32:14,772 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 137 [2020-10-28 14:32:14,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:14,773 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-10-28 14:32:14,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:32:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-10-28 14:32:14,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 14:32:14,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:14,774 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:14,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:32:14,774 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:14,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1160308644, now seen corresponding path program 17 times [2020-10-28 14:32:14,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:14,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098738455] [2020-10-28 14:32:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:14,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:17,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:17,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 14:32:17,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:17,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2716 [2020-10-28 14:32:17,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:17,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:17,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:32:17,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:17,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 14:32:17,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:18,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:18,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:18,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:18,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098738455] [2020-10-28 14:32:18,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:18,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:32:18,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411801075] [2020-10-28 14:32:18,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:32:18,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:32:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:18,884 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 20 states. [2020-10-28 14:32:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:21,096 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2020-10-28 14:32:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:32:21,096 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 145 [2020-10-28 14:32:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:21,098 INFO L225 Difference]: With dead ends: 236 [2020-10-28 14:32:21,099 INFO L226 Difference]: Without dead ends: 232 [2020-10-28 14:32:21,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:32:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-28 14:32:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 183. [2020-10-28 14:32:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 14:32:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-10-28 14:32:21,122 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 145 [2020-10-28 14:32:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:21,122 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-10-28 14:32:21,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:32:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-10-28 14:32:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 14:32:21,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:21,124 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:21,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:32:21,124 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:21,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1932398282, now seen corresponding path program 18 times [2020-10-28 14:32:21,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:21,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405522846] [2020-10-28 14:32:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:21,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:23,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:23,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 14:32:23,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:23,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2260 [2020-10-28 14:32:23,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:23,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:23,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:32:23,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:23,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-28 14:32:23,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:24,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:24,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:24,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:24,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:24,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:24,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:24,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:24,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:24,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:24,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:24,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:24,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:25,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405522846] [2020-10-28 14:32:25,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:25,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:32:25,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757996007] [2020-10-28 14:32:25,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:32:25,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:25,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:32:25,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:25,194 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 21 states. [2020-10-28 14:32:26,381 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-28 14:32:26,617 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-28 14:32:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:27,814 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2020-10-28 14:32:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:32:27,815 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-10-28 14:32:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:27,817 INFO L225 Difference]: With dead ends: 235 [2020-10-28 14:32:27,817 INFO L226 Difference]: Without dead ends: 231 [2020-10-28 14:32:27,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:32:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-28 14:32:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 183. [2020-10-28 14:32:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 14:32:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-10-28 14:32:27,839 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 146 [2020-10-28 14:32:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:27,839 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-10-28 14:32:27,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:32:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-10-28 14:32:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 14:32:27,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:27,840 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:27,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:32:27,840 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1508474280, now seen corresponding path program 19 times [2020-10-28 14:32:27,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:27,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030495497] [2020-10-28 14:32:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:27,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:30,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:30,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 14:32:30,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:30,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2518 [2020-10-28 14:32:30,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:30,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:30,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:32:30,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:30,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-28 14:32:30,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:31,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:31,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:31,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:31,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:31,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:31,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:31,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:31,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:31,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:31,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:31,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 28 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:31,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030495497] [2020-10-28 14:32:31,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:31,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:32:31,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829027138] [2020-10-28 14:32:31,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:32:31,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:32:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:31,860 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 21 states. [2020-10-28 14:32:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:34,483 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2020-10-28 14:32:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:32:34,484 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 153 [2020-10-28 14:32:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:34,485 INFO L225 Difference]: With dead ends: 245 [2020-10-28 14:32:34,486 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 14:32:34,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:32:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 14:32:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-28 14:32:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-28 14:32:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-10-28 14:32:34,502 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 153 [2020-10-28 14:32:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:34,503 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-10-28 14:32:34,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:32:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-10-28 14:32:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 14:32:34,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:34,504 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:34,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:32:34,504 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:34,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1848451966, now seen corresponding path program 20 times [2020-10-28 14:32:34,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:34,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907931432] [2020-10-28 14:32:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:34,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:37,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:37,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 14:32:37,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:37,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2673 [2020-10-28 14:32:37,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:37,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:32:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-28 14:32:37,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,109 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-10-28 14:32:38,317 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-28 14:32:38,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:38,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:38,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:38,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:38,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:38,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:38,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:38,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:38,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:38,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:38,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:39,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907931432] [2020-10-28 14:32:39,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:39,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:32:39,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889523824] [2020-10-28 14:32:39,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:32:39,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:39,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:32:39,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:32:39,182 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 22 states. [2020-10-28 14:32:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:42,115 INFO L93 Difference]: Finished difference Result 253 states and 256 transitions. [2020-10-28 14:32:42,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:32:42,116 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-10-28 14:32:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:42,118 INFO L225 Difference]: With dead ends: 253 [2020-10-28 14:32:42,118 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 14:32:42,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:32:42,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 14:32:42,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2020-10-28 14:32:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 14:32:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2020-10-28 14:32:42,146 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 154 [2020-10-28 14:32:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:42,146 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2020-10-28 14:32:42,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:32:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2020-10-28 14:32:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-28 14:32:42,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:42,148 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:42,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:32:42,148 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1829354446, now seen corresponding path program 21 times [2020-10-28 14:32:42,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:42,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612202443] [2020-10-28 14:32:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:42,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:45,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:45,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 14:32:45,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:45,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3034 [2020-10-28 14:32:45,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:45,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:45,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:32:45,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:45,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 14:32:45,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:46,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:46,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:46,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:46,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:46,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:46,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:46,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:46,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:47,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612202443] [2020-10-28 14:32:47,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:47,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:32:47,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468557502] [2020-10-28 14:32:47,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:32:47,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:32:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:32:47,153 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 22 states. [2020-10-28 14:32:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:49,945 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-28 14:32:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:32:49,946 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 162 [2020-10-28 14:32:49,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:49,950 INFO L225 Difference]: With dead ends: 261 [2020-10-28 14:32:49,950 INFO L226 Difference]: Without dead ends: 257 [2020-10-28 14:32:49,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:32:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-28 14:32:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 200. [2020-10-28 14:32:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 14:32:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2020-10-28 14:32:49,978 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 162 [2020-10-28 14:32:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:49,978 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2020-10-28 14:32:49,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:32:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2020-10-28 14:32:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-28 14:32:49,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:49,980 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:49,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:32:49,980 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash -491101412, now seen corresponding path program 22 times [2020-10-28 14:32:49,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:49,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496922973] [2020-10-28 14:32:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:53,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:53,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 14:32:53,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:53,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2969 [2020-10-28 14:32:53,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:53,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:53,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:32:53,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:53,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-28 14:32:53,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:53,832 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-28 14:32:54,058 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-28 14:32:54,284 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-28 14:32:55,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:55,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:55,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:55,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:55,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:32:55,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:55,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:55,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:55,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496922973] [2020-10-28 14:32:55,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:55,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:32:55,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840357633] [2020-10-28 14:32:55,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:32:55,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:55,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:32:55,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:32:55,459 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 23 states. [2020-10-28 14:32:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:58,446 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2020-10-28 14:32:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:32:58,446 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 163 [2020-10-28 14:32:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:58,449 INFO L225 Difference]: With dead ends: 260 [2020-10-28 14:32:58,449 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 14:32:58,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:32:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 14:32:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 200. [2020-10-28 14:32:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 14:32:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2020-10-28 14:32:58,475 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 163 [2020-10-28 14:32:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:58,476 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2020-10-28 14:32:58,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:32:58,476 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2020-10-28 14:32:58,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 14:32:58,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:58,477 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:58,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:32:58,477 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1396870938, now seen corresponding path program 23 times [2020-10-28 14:32:58,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:58,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550599101] [2020-10-28 14:32:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:58,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:01,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:01,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 14:33:01,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:01,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3326 [2020-10-28 14:33:01,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:01,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:01,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:33:01,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:01,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-28 14:33:01,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:03,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:03,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:03,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:03,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:03,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:03,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:03,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:03,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:03,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:03,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:03,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:03,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 32 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:03,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550599101] [2020-10-28 14:33:03,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:03,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:33:03,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334276033] [2020-10-28 14:33:03,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:33:03,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:03,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:33:03,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:33:03,609 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 23 states. [2020-10-28 14:33:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:06,903 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2020-10-28 14:33:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:33:06,903 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 170 [2020-10-28 14:33:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:06,905 INFO L225 Difference]: With dead ends: 270 [2020-10-28 14:33:06,906 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 14:33:06,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:33:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 14:33:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-28 14:33:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 14:33:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-10-28 14:33:06,929 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 170 [2020-10-28 14:33:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:06,929 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-10-28 14:33:06,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:33:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-10-28 14:33:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 14:33:06,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:06,931 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:06,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:33:06,931 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:06,931 INFO L82 PathProgramCache]: Analyzing trace with hash -365557656, now seen corresponding path program 24 times [2020-10-28 14:33:06,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:06,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867791892] [2020-10-28 14:33:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:07,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:10,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:10,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 14:33:10,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:10,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3536 [2020-10-28 14:33:10,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:10,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:10,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:33:10,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:10,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-28 14:33:10,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:11,780 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-28 14:33:12,004 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-28 14:33:12,226 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-10-28 14:33:12,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:12,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:12,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:12,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:12,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:12,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:12,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:13,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867791892] [2020-10-28 14:33:13,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:13,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:33:13,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085340345] [2020-10-28 14:33:13,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:33:13,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:33:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:33:13,289 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 24 states. [2020-10-28 14:33:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:16,973 INFO L93 Difference]: Finished difference Result 278 states and 281 transitions. [2020-10-28 14:33:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:33:16,974 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 171 [2020-10-28 14:33:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:16,976 INFO L225 Difference]: With dead ends: 278 [2020-10-28 14:33:16,976 INFO L226 Difference]: Without dead ends: 274 [2020-10-28 14:33:16,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:33:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-28 14:33:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 209. [2020-10-28 14:33:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 14:33:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2020-10-28 14:33:17,002 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 171 [2020-10-28 14:33:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:17,003 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2020-10-28 14:33:17,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:33:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2020-10-28 14:33:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-28 14:33:17,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:17,004 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:17,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:33:17,005 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1720558004, now seen corresponding path program 25 times [2020-10-28 14:33:17,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:17,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254421169] [2020-10-28 14:33:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:17,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:21,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-28 14:33:21,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:21,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4469 [2020-10-28 14:33:21,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:21,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:21,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:33:21,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:21,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-28 14:33:21,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:22,577 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-28 14:33:23,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:23,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:23,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:23,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:23,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:23,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:33:23,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:23,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:23,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:23,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:23,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:23,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:23,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254421169] [2020-10-28 14:33:23,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:23,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:33:23,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109962752] [2020-10-28 14:33:23,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:33:23,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:23,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:33:23,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:33:23,958 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 24 states. [2020-10-28 14:33:25,314 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-28 14:33:25,655 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-28 14:33:27,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:27,647 INFO L93 Difference]: Finished difference Result 286 states and 289 transitions. [2020-10-28 14:33:27,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:33:27,648 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 179 [2020-10-28 14:33:27,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:27,650 INFO L225 Difference]: With dead ends: 286 [2020-10-28 14:33:27,650 INFO L226 Difference]: Without dead ends: 282 [2020-10-28 14:33:27,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:33:27,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-28 14:33:27,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 217. [2020-10-28 14:33:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-28 14:33:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-10-28 14:33:27,684 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 179 [2020-10-28 14:33:27,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:27,685 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-10-28 14:33:27,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:33:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-10-28 14:33:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-28 14:33:27,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:27,686 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:27,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:33:27,686 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:27,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1078806798, now seen corresponding path program 26 times [2020-10-28 14:33:27,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:27,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232720498] [2020-10-28 14:33:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:32,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-28 14:33:32,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4456 [2020-10-28 14:33:32,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:32,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:33:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-28 14:33:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:33,444 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-28 14:33:33,595 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-28 14:33:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:34,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:34,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:34,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:34,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:34,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:34,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:34,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:34,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:34,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:34,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:34,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:34,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232720498] [2020-10-28 14:33:34,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:34,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:33:34,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674895205] [2020-10-28 14:33:34,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:33:34,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:34,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:33:34,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:33:34,850 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 25 states. [2020-10-28 14:33:37,024 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-28 14:33:38,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:38,937 INFO L93 Difference]: Finished difference Result 285 states and 287 transitions. [2020-10-28 14:33:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:33:38,939 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 180 [2020-10-28 14:33:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:38,941 INFO L225 Difference]: With dead ends: 285 [2020-10-28 14:33:38,941 INFO L226 Difference]: Without dead ends: 281 [2020-10-28 14:33:38,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:33:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-28 14:33:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 217. [2020-10-28 14:33:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-28 14:33:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-10-28 14:33:38,968 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 180 [2020-10-28 14:33:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:38,968 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-10-28 14:33:38,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:33:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-10-28 14:33:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-28 14:33:38,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:38,970 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:38,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:33:38,970 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:38,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2037567744, now seen corresponding path program 27 times [2020-10-28 14:33:38,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:38,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70911183] [2020-10-28 14:33:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:39,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:44,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:44,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-28 14:33:44,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:44,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 14:33:44,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:44,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:33:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-28 14:33:44,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:44,950 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-28 14:33:46,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:46,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 36 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:46,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70911183] [2020-10-28 14:33:46,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:46,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:33:46,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796110843] [2020-10-28 14:33:46,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:33:46,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:46,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:33:46,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:33:46,561 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 25 states. [2020-10-28 14:33:48,719 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-28 14:33:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:51,092 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2020-10-28 14:33:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:33:51,093 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 187 [2020-10-28 14:33:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:51,094 INFO L225 Difference]: With dead ends: 295 [2020-10-28 14:33:51,094 INFO L226 Difference]: Without dead ends: 189 [2020-10-28 14:33:51,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:33:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-28 14:33:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-10-28 14:33:51,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-28 14:33:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2020-10-28 14:33:51,118 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 187 [2020-10-28 14:33:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:51,119 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2020-10-28 14:33:51,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:33:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2020-10-28 14:33:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-28 14:33:51,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:51,120 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:51,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:33:51,120 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:51,120 INFO L82 PathProgramCache]: Analyzing trace with hash -171647910, now seen corresponding path program 28 times [2020-10-28 14:33:51,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:51,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116507173] [2020-10-28 14:33:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:51,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:56,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:56,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-28 14:33:56,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:56,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4981 [2020-10-28 14:33:56,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:56,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:33:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-28 14:33:56,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:57,361 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-28 14:33:57,568 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-28 14:33:57,981 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-10-28 14:33:58,302 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-10-28 14:33:58,588 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2020-10-28 14:33:58,762 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-28 14:33:59,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:59,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:59,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:59,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:59,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:59,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 0 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:00,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116507173] [2020-10-28 14:34:00,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:00,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:34:00,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845783312] [2020-10-28 14:34:00,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:34:00,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:00,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:34:00,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:34:00,146 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 26 states. [2020-10-28 14:34:02,279 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-28 14:34:02,821 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-28 14:34:03,034 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-28 14:34:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:05,079 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2020-10-28 14:34:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:34:05,104 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 188 [2020-10-28 14:34:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:05,105 INFO L225 Difference]: With dead ends: 303 [2020-10-28 14:34:05,105 INFO L226 Difference]: Without dead ends: 299 [2020-10-28 14:34:05,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=134, Invalid=1758, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:34:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-28 14:34:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 226. [2020-10-28 14:34:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-28 14:34:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2020-10-28 14:34:05,135 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 188 [2020-10-28 14:34:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:05,135 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2020-10-28 14:34:05,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:34:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2020-10-28 14:34:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-28 14:34:05,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:05,137 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:05,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:34:05,137 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1807064154, now seen corresponding path program 29 times [2020-10-28 14:34:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:05,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435723294] [2020-10-28 14:34:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:05,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:10,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:10,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-28 14:34:10,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:10,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 14:34:10,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:10,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:10,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:34:10,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:10,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-28 14:34:10,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:11,728 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-10-28 14:34:12,053 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-28 14:34:12,224 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-28 14:34:13,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:13,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:13,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:13,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435723294] [2020-10-28 14:34:13,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:13,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:34:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592014660] [2020-10-28 14:34:13,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:34:13,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:34:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:34:13,692 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 26 states. [2020-10-28 14:34:15,868 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-28 14:34:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:18,314 INFO L93 Difference]: Finished difference Result 311 states and 314 transitions. [2020-10-28 14:34:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:34:18,314 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 196 [2020-10-28 14:34:18,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:18,317 INFO L225 Difference]: With dead ends: 311 [2020-10-28 14:34:18,317 INFO L226 Difference]: Without dead ends: 307 [2020-10-28 14:34:18,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:34:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-28 14:34:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 234. [2020-10-28 14:34:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 14:34:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2020-10-28 14:34:18,359 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 196 [2020-10-28 14:34:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:18,360 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2020-10-28 14:34:18,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:34:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2020-10-28 14:34:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-28 14:34:18,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:18,361 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:18,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:34:18,362 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:18,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1615971212, now seen corresponding path program 30 times [2020-10-28 14:34:18,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:18,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580651439] [2020-10-28 14:34:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:18,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:23,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:23,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-28 14:34:23,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5246 [2020-10-28 14:34:23,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:23,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 14:34:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-28 14:34:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:25,339 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2020-10-28 14:34:25,628 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 107 [2020-10-28 14:34:25,826 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-28 14:34:26,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:26,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:26,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:26,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:26,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:26,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:34:26,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:26,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:26,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:26,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:26,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:26,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:27,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580651439] [2020-10-28 14:34:27,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:27,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:34:27,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507051356] [2020-10-28 14:34:27,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:34:27,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:27,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:34:27,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:34:27,499 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand 27 states. [2020-10-28 14:34:29,566 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-28 14:34:30,286 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-28 14:34:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:32,637 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2020-10-28 14:34:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:34:32,638 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 197 [2020-10-28 14:34:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:32,640 INFO L225 Difference]: With dead ends: 310 [2020-10-28 14:34:32,640 INFO L226 Difference]: Without dead ends: 306 [2020-10-28 14:34:32,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=132, Invalid=1760, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:34:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-28 14:34:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 234. [2020-10-28 14:34:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 14:34:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2020-10-28 14:34:32,675 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 197 [2020-10-28 14:34:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:32,675 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2020-10-28 14:34:32,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:34:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2020-10-28 14:34:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-28 14:34:32,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:32,677 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:32,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:34:32,677 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash -123085070, now seen corresponding path program 31 times [2020-10-28 14:34:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:32,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907205133] [2020-10-28 14:34:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:32,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking...