/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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 -i ../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:20:24,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:20:24,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:20:24,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:20:24,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:20:24,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:20:24,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:20:24,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:20:24,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:20:24,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:20:24,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:20:24,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:20:24,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:20:24,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:20:24,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:20:24,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:20:24,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:20:24,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:20:24,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:20:24,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:20:24,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:20:24,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:20:24,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:20:24,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:20:24,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:20:24,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:20:24,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:20:24,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:20:24,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:20:24,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:20:24,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:20:24,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:20:24,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:20:24,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:20:24,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:20:24,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:20:24,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:20:24,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:20:24,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:20:24,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:20:24,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:20:24,314 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 [2020-10-14 23:20:24,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:20:24,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:20:24,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:20:24,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:20:24,338 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:20:24,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:20:24,338 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:20:24,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:20:24,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:20:24,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:20:24,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:20:24,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:20:24,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:20:24,339 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:20:24,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:20:24,340 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:20:24,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:20:24,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:20:24,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:20:24,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:20:24,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:20:24,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:20:24,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:20:24,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:20:24,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:20:24,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:20:24,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:20:24,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:20:24,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:20:24,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:20:24,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:20:24,705 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:20:24,708 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:20:24,710 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:20:24,710 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:20:24,711 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-14 23:20:24,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e4e31c06/45512bed5a97433fab15efcc0728b3be/FLAG3402487e6 [2020-10-14 23:20:25,277 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:20:25,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-14 23:20:25,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e4e31c06/45512bed5a97433fab15efcc0728b3be/FLAG3402487e6 [2020-10-14 23:20:25,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e4e31c06/45512bed5a97433fab15efcc0728b3be [2020-10-14 23:20:25,636 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:20:25,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:20:25,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:20:25,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:20:25,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:20:25,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:20:25" (1/1) ... [2020-10-14 23:20:25,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b9e6e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:25, skipping insertion in model container [2020-10-14 23:20:25,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:20:25" (1/1) ... [2020-10-14 23:20:25,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:20:25,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:20:26,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:20:26,140 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:20:26,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:20:26,234 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:20:26,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26 WrapperNode [2020-10-14 23:20:26,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:20:26,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:20:26,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:20:26,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:20:26,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26" (1/1) ... [2020-10-14 23:20:26,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26" (1/1) ... [2020-10-14 23:20:26,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26" (1/1) ... [2020-10-14 23:20:26,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26" (1/1) ... [2020-10-14 23:20:26,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26" (1/1) ... [2020-10-14 23:20:26,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26" (1/1) ... [2020-10-14 23:20:26,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26" (1/1) ... [2020-10-14 23:20:26,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:20:26,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:20:26,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:20:26,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:20:26,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26" (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 [2020-10-14 23:20:26,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:20:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:20:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:20:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:20:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:20:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:20:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:20:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:20:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:20:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:20:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:20:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:20:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:20:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:20:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:20:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:20:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:20:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:20:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:20:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:20:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:20:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:20:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:20:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:20:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:20:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:20:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:20:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:20:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:20:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:20:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:20:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:20:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:20:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:20:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:20:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:20:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:20:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:20:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:20:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:20:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:20:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:20:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:20:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:20:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:20:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:20:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:20:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:20:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:20:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:20:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:20:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:20:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:20:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:20:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:20:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:20:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:20:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 23:20:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:20:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:20:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:20:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:20:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:20:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:20:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:20:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:20:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:20:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:20:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:20:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:20:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:20:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:20:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:20:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:20:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:20:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:20:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:20:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:20:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:20:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:20:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:20:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:20:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:20:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:20:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:20:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:20:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:20:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:20:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:20:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:20:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:20:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:20:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:20:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:20:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:20:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:20:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:20:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:20:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:20:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:20:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:20:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:20:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:20:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:20:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:20:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:20:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:20:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:20:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:20:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:20:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:20:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:20:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:20:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:20:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:20:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:20:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:20:26,956 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:20:26,956 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 23:20:26,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:20:26 BoogieIcfgContainer [2020-10-14 23:20:26,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:20:26,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:20:26,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:20:26,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:20:26,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:20:25" (1/3) ... [2020-10-14 23:20:26,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277da61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:20:26, skipping insertion in model container [2020-10-14 23:20:26,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:20:26" (2/3) ... [2020-10-14 23:20:26,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277da61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:20:26, skipping insertion in model container [2020-10-14 23:20:26,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:20:26" (3/3) ... [2020-10-14 23:20:26,972 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2020-10-14 23:20:26,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:20:26,995 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:20:27,008 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:20:27,031 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:20:27,032 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:20:27,032 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:20:27,032 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:20:27,032 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:20:27,032 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:20:27,033 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:20:27,033 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:20:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-14 23:20:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:20:27,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:27,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:27,056 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:27,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:27,062 INFO L82 PathProgramCache]: Analyzing trace with hash 905993573, now seen corresponding path program 1 times [2020-10-14 23:20:27,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:27,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308308926] [2020-10-14 23:20:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:27,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:27,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:27,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:27,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:28,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:28,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:20:28,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:20:28,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-14 23:20:28,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:28,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:28,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:20:28,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:28,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:20:28,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:20:28,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:28,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:28,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:28,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:28,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:28,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 23:20:28,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:28,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:28,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:28,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:28,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:28,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:28,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308308926] [2020-10-14 23:20:28,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:28,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 23:20:28,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730309883] [2020-10-14 23:20:28,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:20:28,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:28,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:20:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:20:28,300 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 9 states. [2020-10-14 23:20:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:28,874 INFO L93 Difference]: Finished difference Result 112 states and 172 transitions. [2020-10-14 23:20:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:20:28,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-14 23:20:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:28,888 INFO L225 Difference]: With dead ends: 112 [2020-10-14 23:20:28,888 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 23:20:28,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:20:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 23:20:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2020-10-14 23:20:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:20:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2020-10-14 23:20:28,936 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 19 [2020-10-14 23:20:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:28,936 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2020-10-14 23:20:28,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:20:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2020-10-14 23:20:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:20:28,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:28,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:28,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:20:28,938 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:28,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:28,939 INFO L82 PathProgramCache]: Analyzing trace with hash 548970733, now seen corresponding path program 1 times [2020-10-14 23:20:28,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:28,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020063413] [2020-10-14 23:20:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:28,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:29,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:29,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:20:29,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:29,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-14 23:20:29,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:29,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:29,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:20:29,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:29,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:20:29,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:29,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:29,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:29,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:29,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:29,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:29,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:29,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:29,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:29,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:29,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020063413] [2020-10-14 23:20:29,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:29,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 23:20:29,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477898780] [2020-10-14 23:20:29,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:20:29,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:20:29,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:29,288 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 8 states. [2020-10-14 23:20:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:29,871 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-10-14 23:20:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:20:29,872 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 23:20:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:29,873 INFO L225 Difference]: With dead ends: 75 [2020-10-14 23:20:29,874 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 23:20:29,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:20:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 23:20:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2020-10-14 23:20:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 23:20:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-14 23:20:29,884 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 20 [2020-10-14 23:20:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:29,885 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-14 23:20:29,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:20:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-14 23:20:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:20:29,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:29,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:29,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:20:29,887 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:29,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142159, now seen corresponding path program 1 times [2020-10-14 23:20:29,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:29,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607871232] [2020-10-14 23:20:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:29,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:30,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:30,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:20:30,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:30,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-14 23:20:30,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:30,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:20:30,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:30,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:30,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:30,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:30,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:30,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:30,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:30,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:30,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:30,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:30,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:30,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:30,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:30,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607871232] [2020-10-14 23:20:30,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:30,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 23:20:30,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379657442] [2020-10-14 23:20:30,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:20:30,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:30,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:20:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:20:30,541 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 8 states. [2020-10-14 23:20:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:30,817 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-14 23:20:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:20:30,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 23:20:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:30,818 INFO L225 Difference]: With dead ends: 71 [2020-10-14 23:20:30,819 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:20:30,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:20:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:20:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-14 23:20:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:20:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-14 23:20:30,826 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2020-10-14 23:20:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:30,826 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-14 23:20:30,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:20:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-14 23:20:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:20:30,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:30,828 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] [2020-10-14 23:20:30,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:20:30,828 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:30,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2019097607, now seen corresponding path program 1 times [2020-10-14 23:20:30,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:30,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912083291] [2020-10-14 23:20:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:30,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:30,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:30,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:31,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:31,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:31,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:20:31,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:20:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-14 23:20:31,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:31,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:20:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:20:31,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:20:31,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:31,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:31,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:31,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:31,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:31,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:31,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:31,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:31,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:31,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912083291] [2020-10-14 23:20:31,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:20:31,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:20:31,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100670012] [2020-10-14 23:20:31,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:20:31,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:31,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:20:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:20:31,321 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 6 states. [2020-10-14 23:20:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:31,553 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2020-10-14 23:20:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:20:31,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 23:20:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:31,555 INFO L225 Difference]: With dead ends: 70 [2020-10-14 23:20:31,555 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:20:31,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:20:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:20:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-14 23:20:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 23:20:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2020-10-14 23:20:31,564 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 21 [2020-10-14 23:20:31,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:31,564 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2020-10-14 23:20:31,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:20:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2020-10-14 23:20:31,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:20:31,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:31,565 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:31,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:20:31,566 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:31,566 INFO L82 PathProgramCache]: Analyzing trace with hash 63499643, now seen corresponding path program 1 times [2020-10-14 23:20:31,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:31,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088542872] [2020-10-14 23:20:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:31,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:31,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:32,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:32,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:32,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:20:32,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:20:32,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-14 23:20:32,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:32,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:20:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:20:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:20:32,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:32,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:32,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:32,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:32,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:32,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:32,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:32,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:32,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:32,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088542872] [2020-10-14 23:20:32,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:32,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:20:32,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796559011] [2020-10-14 23:20:32,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:20:32,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:32,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:20:32,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:32,916 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 10 states. [2020-10-14 23:20:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:33,242 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-10-14 23:20:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:20:33,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-14 23:20:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:33,244 INFO L225 Difference]: With dead ends: 98 [2020-10-14 23:20:33,244 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 23:20:33,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:20:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 23:20:33,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-10-14 23:20:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 23:20:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-10-14 23:20:33,258 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 23 [2020-10-14 23:20:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:33,259 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-14 23:20:33,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:20:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-10-14 23:20:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:20:33,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:33,260 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:33,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:20:33,261 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash 61652601, now seen corresponding path program 1 times [2020-10-14 23:20:33,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:33,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335620730] [2020-10-14 23:20:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:33,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:33,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:33,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:20:33,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:33,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-14 23:20:33,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:33,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:20:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:20:33,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:34,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:34,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:34,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:34,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:34,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:34,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:20:34,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:34,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:34,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:34,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:34,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:34,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:34,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335620730] [2020-10-14 23:20:34,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:34,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:20:34,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159551921] [2020-10-14 23:20:34,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:20:34,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:34,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:20:34,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:20:34,156 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 11 states. [2020-10-14 23:20:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:34,806 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2020-10-14 23:20:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:20:34,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-14 23:20:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:34,808 INFO L225 Difference]: With dead ends: 97 [2020-10-14 23:20:34,808 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 23:20:34,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:20:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 23:20:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2020-10-14 23:20:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 23:20:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-10-14 23:20:34,818 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 23 [2020-10-14 23:20:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:34,818 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-14 23:20:34,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:20:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2020-10-14 23:20:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:20:34,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:34,820 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:34,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:20:34,820 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:34,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1838507005, now seen corresponding path program 1 times [2020-10-14 23:20:34,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:34,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164993608] [2020-10-14 23:20:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:34,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:34,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:35,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:36,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:36,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:20:36,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:36,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-14 23:20:36,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:36,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:20:36,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:36,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:20:36,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:36,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:36,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:36,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:36,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:36,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:36,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:36,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:36,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:36,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:36,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164993608] [2020-10-14 23:20:36,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:36,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:20:36,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659468536] [2020-10-14 23:20:36,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:20:36,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:20:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:20:36,310 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand 11 states. [2020-10-14 23:20:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:36,676 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2020-10-14 23:20:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:20:36,677 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-14 23:20:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:36,678 INFO L225 Difference]: With dead ends: 89 [2020-10-14 23:20:36,678 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:20:36,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:20:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:20:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-10-14 23:20:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:20:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2020-10-14 23:20:36,687 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 23 [2020-10-14 23:20:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:36,690 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2020-10-14 23:20:36,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:20:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2020-10-14 23:20:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:20:36,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:36,691 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:36,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:20:36,692 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1801372977, now seen corresponding path program 1 times [2020-10-14 23:20:36,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:36,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71355111] [2020-10-14 23:20:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:36,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:36,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:37,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:37,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:38,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:38,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:20:38,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:20:38,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1498 [2020-10-14 23:20:38,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:38,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:38,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:20:38,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:38,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:20:38,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:38,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:38,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:38,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:38,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:38,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:38,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:38,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:38,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:38,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:38,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:38,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:38,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:38,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71355111] [2020-10-14 23:20:38,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:38,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:20:38,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894204782] [2020-10-14 23:20:38,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:20:38,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:38,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:20:38,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:38,559 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand 10 states. [2020-10-14 23:20:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:39,594 INFO L93 Difference]: Finished difference Result 107 states and 136 transitions. [2020-10-14 23:20:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:20:39,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 23:20:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:39,596 INFO L225 Difference]: With dead ends: 107 [2020-10-14 23:20:39,596 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 23:20:39,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:20:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 23:20:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 47. [2020-10-14 23:20:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:20:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2020-10-14 23:20:39,606 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 24 [2020-10-14 23:20:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:39,606 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2020-10-14 23:20:39,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:20:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2020-10-14 23:20:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:20:39,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:39,608 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] [2020-10-14 23:20:39,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:20:39,608 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1539699924, now seen corresponding path program 1 times [2020-10-14 23:20:39,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:39,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153454540] [2020-10-14 23:20:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:39,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:39,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:39,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:40,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:40,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:20:40,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:40,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-14 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:20:40,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:40,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:40,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:40,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:40,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:40,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:40,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:40,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:40,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:40,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:40,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153454540] [2020-10-14 23:20:40,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:40,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:20:40,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235642980] [2020-10-14 23:20:40,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:20:40,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:40,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:20:40,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:20:40,090 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 7 states. [2020-10-14 23:20:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:40,431 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-10-14 23:20:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:20:40,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-14 23:20:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:40,433 INFO L225 Difference]: With dead ends: 84 [2020-10-14 23:20:40,434 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:20:40,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:20:40,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:20:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-14 23:20:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:20:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-14 23:20:40,444 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 30 [2020-10-14 23:20:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:40,444 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-14 23:20:40,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:20:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-14 23:20:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:20:40,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:40,445 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] [2020-10-14 23:20:40,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:20:40,446 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:40,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:40,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1930138464, now seen corresponding path program 1 times [2020-10-14 23:20:40,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:40,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81000559] [2020-10-14 23:20:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:40,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:40,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:40,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:41,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:42,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:42,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:43,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:43,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:43,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:43,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:20:43,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:20:43,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3124 [2020-10-14 23:20:43,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:43,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:20:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:43,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:20:43,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:43,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:43,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:43,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:43,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:43,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:43,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:20:43,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:43,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:43,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:43,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81000559] [2020-10-14 23:20:43,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:43,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:20:43,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692690187] [2020-10-14 23:20:43,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:20:43,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:20:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:20:43,848 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 11 states. [2020-10-14 23:20:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:44,739 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2020-10-14 23:20:44,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:20:44,740 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-14 23:20:44,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:44,741 INFO L225 Difference]: With dead ends: 133 [2020-10-14 23:20:44,741 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 23:20:44,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:20:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 23:20:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 81. [2020-10-14 23:20:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 23:20:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2020-10-14 23:20:44,756 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 33 [2020-10-14 23:20:44,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:44,756 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2020-10-14 23:20:44,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:20:44,757 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2020-10-14 23:20:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:20:44,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:44,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:44,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:20:44,762 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:44,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1928291422, now seen corresponding path program 1 times [2020-10-14 23:20:44,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:44,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683145362] [2020-10-14 23:20:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:45,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:45,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:45,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:45,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:20:45,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:20:45,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1063 [2020-10-14 23:20:45,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:45,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:45,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:20:45,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:45,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:20:45,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:46,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:46,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:46,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:46,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:46,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:46,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:46,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:20:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:46,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683145362] [2020-10-14 23:20:46,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:46,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:20:46,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119660511] [2020-10-14 23:20:46,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:20:46,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:46,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:20:46,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:20:46,081 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand 12 states. [2020-10-14 23:20:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:47,132 INFO L93 Difference]: Finished difference Result 133 states and 168 transitions. [2020-10-14 23:20:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:20:47,132 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-14 23:20:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:47,133 INFO L225 Difference]: With dead ends: 133 [2020-10-14 23:20:47,133 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 23:20:47,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:20:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 23:20:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 81. [2020-10-14 23:20:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 23:20:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2020-10-14 23:20:47,145 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 33 [2020-10-14 23:20:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:47,145 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2020-10-14 23:20:47,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:20:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2020-10-14 23:20:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:20:47,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:47,146 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] [2020-10-14 23:20:47,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:20:47,147 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:47,147 INFO L82 PathProgramCache]: Analyzing trace with hash -589821470, now seen corresponding path program 1 times [2020-10-14 23:20:47,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:47,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905321252] [2020-10-14 23:20:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:47,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:47,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:47,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:47,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:47,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:48,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:48,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:49,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:49,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:20:49,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:20:49,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1857 [2020-10-14 23:20:49,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:49,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:20:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:49,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:20:49,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-14 23:20:49,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:49,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:49,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:49,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:49,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:49,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:20:49,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:49,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:49,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:49,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:49,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:49,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:49,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905321252] [2020-10-14 23:20:49,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:49,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:20:49,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457483016] [2020-10-14 23:20:49,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:20:49,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:49,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:20:49,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:49,303 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand 10 states. [2020-10-14 23:20:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:49,920 INFO L93 Difference]: Finished difference Result 128 states and 165 transitions. [2020-10-14 23:20:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:20:49,920 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-14 23:20:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:49,922 INFO L225 Difference]: With dead ends: 128 [2020-10-14 23:20:49,922 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 23:20:49,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:20:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 23:20:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 76. [2020-10-14 23:20:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:20:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-10-14 23:20:49,934 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 33 [2020-10-14 23:20:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:49,934 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-10-14 23:20:49,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:20:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-10-14 23:20:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:20:49,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:49,936 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] [2020-10-14 23:20:49,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:20:49,936 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:49,936 INFO L82 PathProgramCache]: Analyzing trace with hash 300539164, now seen corresponding path program 1 times [2020-10-14 23:20:49,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:49,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912766830] [2020-10-14 23:20:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:49,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:50,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:50,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:51,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:51,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:51,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:52,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:52,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:52,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:52,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:52,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:54,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:54,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:20:54,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 23:20:54,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4571 [2020-10-14 23:20:54,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:54,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:20:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:54,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:20:54,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:54,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:54,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:54,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:54,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:54,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:54,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:54,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:54,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:54,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:54,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:54,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:54,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912766830] [2020-10-14 23:20:54,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:54,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:20:54,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544925874] [2020-10-14 23:20:54,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:20:54,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:54,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:20:54,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:20:54,777 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 10 states. [2020-10-14 23:20:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:20:55,549 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-10-14 23:20:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:20:55,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-14 23:20:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:20:55,551 INFO L225 Difference]: With dead ends: 134 [2020-10-14 23:20:55,551 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 23:20:55,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:20:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 23:20:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 101. [2020-10-14 23:20:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 23:20:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2020-10-14 23:20:55,565 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 34 [2020-10-14 23:20:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:20:55,566 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2020-10-14 23:20:55,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:20:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2020-10-14 23:20:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:20:55,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:20:55,567 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:20:55,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:20:55,567 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:20:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:20:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1581721260, now seen corresponding path program 2 times [2020-10-14 23:20:55,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:20:55,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566832354] [2020-10-14 23:20:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:20:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:55,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:55,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:56,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:56,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:57,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:57,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:58,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:58,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:58,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:58,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:20:58,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:20:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3393 [2020-10-14 23:20:58,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:58,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:20:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:20:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:20:58,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:59,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:20:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:20:59,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:20:59,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:20:59,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:20:59,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:20:59,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:20:59,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:20:59,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:20:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:20:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:20:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:20:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:20:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:20:59,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566832354] [2020-10-14 23:20:59,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:20:59,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:20:59,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308108361] [2020-10-14 23:20:59,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:20:59,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:20:59,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:20:59,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:20:59,503 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand 13 states. [2020-10-14 23:21:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:00,409 INFO L93 Difference]: Finished difference Result 184 states and 237 transitions. [2020-10-14 23:21:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:21:00,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-14 23:21:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:00,411 INFO L225 Difference]: With dead ends: 184 [2020-10-14 23:21:00,412 INFO L226 Difference]: Without dead ends: 171 [2020-10-14 23:21:00,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:21:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-14 23:21:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-10-14 23:21:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 23:21:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 171 transitions. [2020-10-14 23:21:00,432 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 171 transitions. Word has length 36 [2020-10-14 23:21:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:00,433 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 171 transitions. [2020-10-14 23:21:00,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:21:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 171 transitions. [2020-10-14 23:21:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:21:00,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:00,434 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 23:21:00,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:21:00,434 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1583568302, now seen corresponding path program 2 times [2020-10-14 23:21:00,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:00,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943500689] [2020-10-14 23:21:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:00,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:00,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:01,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:02,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:02,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:21:02,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:02,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1963 [2020-10-14 23:21:02,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:02,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:21:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:21:02,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:02,859 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-10-14 23:21:03,043 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-14 23:21:03,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:03,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:03,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:03,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:03,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:03,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:03,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:03,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:03,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:03,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943500689] [2020-10-14 23:21:03,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:03,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:21:03,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688015760] [2020-10-14 23:21:03,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:21:03,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:03,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:21:03,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:21:03,359 INFO L87 Difference]: Start difference. First operand 133 states and 171 transitions. Second operand 14 states. [2020-10-14 23:21:03,693 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2020-10-14 23:21:03,886 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-14 23:21:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:04,946 INFO L93 Difference]: Finished difference Result 223 states and 279 transitions. [2020-10-14 23:21:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:21:04,946 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 23:21:04,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:04,948 INFO L225 Difference]: With dead ends: 223 [2020-10-14 23:21:04,949 INFO L226 Difference]: Without dead ends: 210 [2020-10-14 23:21:04,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:21:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-14 23:21:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 161. [2020-10-14 23:21:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 23:21:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2020-10-14 23:21:04,968 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 36 [2020-10-14 23:21:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:04,969 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2020-10-14 23:21:04,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:21:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2020-10-14 23:21:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:21:04,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:04,970 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:04,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:21:04,970 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash 193286102, now seen corresponding path program 2 times [2020-10-14 23:21:04,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:04,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201252705] [2020-10-14 23:21:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:05,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:05,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:06,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:06,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:06,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:08,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:08,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:21:08,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:21:08,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3478 [2020-10-14 23:21:08,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:08,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:08,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:21:08,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:08,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:21:08,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:08,796 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-10-14 23:21:08,933 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-14 23:21:09,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:09,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:09,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:09,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:09,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:09,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:09,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:09,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:09,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:09,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201252705] [2020-10-14 23:21:09,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:09,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:21:09,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852201641] [2020-10-14 23:21:09,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:21:09,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:09,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:21:09,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:21:09,058 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand 12 states. [2020-10-14 23:21:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:09,748 INFO L93 Difference]: Finished difference Result 252 states and 320 transitions. [2020-10-14 23:21:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:21:09,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-14 23:21:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:09,751 INFO L225 Difference]: With dead ends: 252 [2020-10-14 23:21:09,751 INFO L226 Difference]: Without dead ends: 235 [2020-10-14 23:21:09,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:21:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-14 23:21:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 165. [2020-10-14 23:21:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 23:21:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 212 transitions. [2020-10-14 23:21:09,770 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 212 transitions. Word has length 36 [2020-10-14 23:21:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:09,771 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 212 transitions. [2020-10-14 23:21:09,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:21:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 212 transitions. [2020-10-14 23:21:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 23:21:09,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:09,771 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:09,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:21:09,772 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1194776922, now seen corresponding path program 1 times [2020-10-14 23:21:09,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:09,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157944471] [2020-10-14 23:21:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:09,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:10,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:11,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:11,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 23:21:11,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1354 [2020-10-14 23:21:11,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:11,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:21:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:21:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:11,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:11,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:11,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:11,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:11,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:11,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:11,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:11,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:11,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:11,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:11,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:11,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:11,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157944471] [2020-10-14 23:21:11,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:11,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:21:11,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155523749] [2020-10-14 23:21:11,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:21:11,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:11,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:21:11,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:11,393 INFO L87 Difference]: Start difference. First operand 165 states and 212 transitions. Second operand 13 states. [2020-10-14 23:21:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:12,292 INFO L93 Difference]: Finished difference Result 254 states and 316 transitions. [2020-10-14 23:21:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:21:12,292 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-14 23:21:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:12,295 INFO L225 Difference]: With dead ends: 254 [2020-10-14 23:21:12,295 INFO L226 Difference]: Without dead ends: 241 [2020-10-14 23:21:12,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:21:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-14 23:21:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 165. [2020-10-14 23:21:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 23:21:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 213 transitions. [2020-10-14 23:21:12,314 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 213 transitions. Word has length 37 [2020-10-14 23:21:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:12,314 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 213 transitions. [2020-10-14 23:21:12,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:21:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 213 transitions. [2020-10-14 23:21:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 23:21:12,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:12,315 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] [2020-10-14 23:21:12,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:21:12,316 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:12,316 INFO L82 PathProgramCache]: Analyzing trace with hash 582077482, now seen corresponding path program 1 times [2020-10-14 23:21:12,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:12,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063036346] [2020-10-14 23:21:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:12,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:12,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:12,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:13,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:14,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:14,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:15,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:15,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:16,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:16,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 23:21:16,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:21:16,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3762 [2020-10-14 23:21:16,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:16,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:21:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:21:16,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:16,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:16,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:16,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:16,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:16,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:16,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:16,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:16,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:16,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:16,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:16,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:16,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:16,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063036346] [2020-10-14 23:21:16,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:16,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:21:16,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678516200] [2020-10-14 23:21:16,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:21:16,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:21:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:21:16,463 INFO L87 Difference]: Start difference. First operand 165 states and 213 transitions. Second operand 12 states. [2020-10-14 23:21:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:17,022 INFO L93 Difference]: Finished difference Result 221 states and 284 transitions. [2020-10-14 23:21:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:21:17,023 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-14 23:21:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:17,024 INFO L225 Difference]: With dead ends: 221 [2020-10-14 23:21:17,024 INFO L226 Difference]: Without dead ends: 204 [2020-10-14 23:21:17,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:21:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-14 23:21:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 141. [2020-10-14 23:21:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 23:21:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2020-10-14 23:21:17,043 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 37 [2020-10-14 23:21:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:17,043 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2020-10-14 23:21:17,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:21:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2020-10-14 23:21:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 23:21:17,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:17,044 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:17,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:21:17,045 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1335846424, now seen corresponding path program 1 times [2020-10-14 23:21:17,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:17,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826660469] [2020-10-14 23:21:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:17,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:17,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:17,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:18,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:18,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:18,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:20,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:20,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:20,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:20,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:20,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:21,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:21,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:21,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:21,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:22,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:22,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 23:21:22,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 23:21:22,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 23:21:22,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:22,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:22,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:21:22,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:21:22,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:22,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:22,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:22,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:22,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:22,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:22,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:22,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:22,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:22,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:22,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826660469] [2020-10-14 23:21:22,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:22,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:21:22,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647037447] [2020-10-14 23:21:22,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:21:22,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:21:22,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:21:22,346 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand 12 states. [2020-10-14 23:21:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:23,240 INFO L93 Difference]: Finished difference Result 224 states and 287 transitions. [2020-10-14 23:21:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:21:23,242 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-14 23:21:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:23,244 INFO L225 Difference]: With dead ends: 224 [2020-10-14 23:21:23,244 INFO L226 Difference]: Without dead ends: 222 [2020-10-14 23:21:23,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:21:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-14 23:21:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2020-10-14 23:21:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 23:21:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 188 transitions. [2020-10-14 23:21:23,261 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 188 transitions. Word has length 37 [2020-10-14 23:21:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:23,262 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 188 transitions. [2020-10-14 23:21:23,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:21:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 188 transitions. [2020-10-14 23:21:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:21:23,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:23,262 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:23,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:21:23,263 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:23,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2008571616, now seen corresponding path program 3 times [2020-10-14 23:21:23,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:23,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159860180] [2020-10-14 23:21:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:23,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:23,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:25,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:26,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:27,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:28,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:28,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:21:28,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:21:28,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 23:21:28,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:28,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:28,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:21:28,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:28,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:21:28,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:28,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:28,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:28,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:28,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:28,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:28,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:28,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:28,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:28,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:28,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159860180] [2020-10-14 23:21:28,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:28,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:21:28,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821258480] [2020-10-14 23:21:28,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:21:28,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:28,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:21:28,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:21:28,874 INFO L87 Difference]: Start difference. First operand 143 states and 188 transitions. Second operand 15 states. [2020-10-14 23:21:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:29,748 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2020-10-14 23:21:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:21:29,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-14 23:21:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:29,750 INFO L225 Difference]: With dead ends: 215 [2020-10-14 23:21:29,750 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 23:21:29,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:21:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 23:21:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 165. [2020-10-14 23:21:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 23:21:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 214 transitions. [2020-10-14 23:21:29,773 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 214 transitions. Word has length 39 [2020-10-14 23:21:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:29,773 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 214 transitions. [2020-10-14 23:21:29,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:21:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 214 transitions. [2020-10-14 23:21:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:21:29,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:29,774 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:29,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:21:29,775 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:29,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2006724574, now seen corresponding path program 3 times [2020-10-14 23:21:29,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:29,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3047067] [2020-10-14 23:21:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:29,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:30,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:31,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:33,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3422 [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:21:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:33,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:21:33,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:33,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:33,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:33,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:33,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:33,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:33,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:33,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:33,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:33,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3047067] [2020-10-14 23:21:33,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:33,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:21:33,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367454092] [2020-10-14 23:21:33,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:21:33,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:33,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:21:33,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:21:33,682 INFO L87 Difference]: Start difference. First operand 165 states and 214 transitions. Second operand 14 states. [2020-10-14 23:21:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:34,829 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2020-10-14 23:21:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:21:34,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-14 23:21:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:34,832 INFO L225 Difference]: With dead ends: 219 [2020-10-14 23:21:34,832 INFO L226 Difference]: Without dead ends: 206 [2020-10-14 23:21:34,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:21:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-14 23:21:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 139. [2020-10-14 23:21:34,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 23:21:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2020-10-14 23:21:34,850 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 39 [2020-10-14 23:21:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:34,851 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2020-10-14 23:21:34,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:21:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2020-10-14 23:21:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:21:34,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:34,852 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:34,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:21:34,852 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:34,852 INFO L82 PathProgramCache]: Analyzing trace with hash 212006942, now seen corresponding path program 2 times [2020-10-14 23:21:34,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:34,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476287791] [2020-10-14 23:21:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:34,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:35,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:35,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:36,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:37,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:38,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:38,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:39,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:39,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:39,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:21:39,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:21:39,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-14 23:21:39,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:39,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:39,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:21:39,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:39,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:21:39,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:40,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:40,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:40,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:40,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:40,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:40,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:40,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:40,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:40,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476287791] [2020-10-14 23:21:40,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:40,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:21:40,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118153496] [2020-10-14 23:21:40,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:21:40,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:40,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:21:40,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:21:40,653 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand 14 states. [2020-10-14 23:21:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:41,586 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2020-10-14 23:21:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:21:41,588 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-14 23:21:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:41,589 INFO L225 Difference]: With dead ends: 180 [2020-10-14 23:21:41,590 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 23:21:41,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:21:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 23:21:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 97. [2020-10-14 23:21:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:21:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-10-14 23:21:41,613 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 40 [2020-10-14 23:21:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:41,614 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-10-14 23:21:41,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:21:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-10-14 23:21:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 23:21:41,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:41,614 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 23:21:41,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:21:41,615 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash -812130555, now seen corresponding path program 4 times [2020-10-14 23:21:41,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:41,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964219006] [2020-10-14 23:21:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:41,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:41,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:41,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:41,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:42,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:43,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:43,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 23:21:43,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:21:43,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2077 [2020-10-14 23:21:43,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:43,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:21:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:21:43,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:43,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:43,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:43,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:43,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:43,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:43,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:43,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:43,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:43,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:21:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:43,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964219006] [2020-10-14 23:21:43,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:43,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:21:43,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919442790] [2020-10-14 23:21:43,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:21:43,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:43,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:21:43,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:21:43,887 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand 10 states. [2020-10-14 23:21:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:44,429 INFO L93 Difference]: Finished difference Result 176 states and 222 transitions. [2020-10-14 23:21:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:21:44,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-14 23:21:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:44,431 INFO L225 Difference]: With dead ends: 176 [2020-10-14 23:21:44,431 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:21:44,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:21:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:21:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-14 23:21:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:21:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 137 transitions. [2020-10-14 23:21:44,450 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 137 transitions. Word has length 43 [2020-10-14 23:21:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:44,451 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 137 transitions. [2020-10-14 23:21:44,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:21:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 137 transitions. [2020-10-14 23:21:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:21:44,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:44,454 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:44,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:21:44,455 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:44,455 INFO L82 PathProgramCache]: Analyzing trace with hash -668122119, now seen corresponding path program 5 times [2020-10-14 23:21:44,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:44,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278771905] [2020-10-14 23:21:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:44,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:45,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:45,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:47,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:47,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:48,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:49,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:49,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:21:49,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:21:49,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4699 [2020-10-14 23:21:49,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:49,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:49,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:21:49,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:49,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 23:21:49,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:49,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:49,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:49,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:49,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:49,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:49,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:49,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:49,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:49,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:49,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278771905] [2020-10-14 23:21:49,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:49,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:21:49,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861335217] [2020-10-14 23:21:49,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:21:49,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:49,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:21:49,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:49,399 INFO L87 Difference]: Start difference. First operand 107 states and 137 transitions. Second operand 13 states. [2020-10-14 23:21:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:50,888 INFO L93 Difference]: Finished difference Result 243 states and 318 transitions. [2020-10-14 23:21:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:21:50,891 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-14 23:21:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:50,893 INFO L225 Difference]: With dead ends: 243 [2020-10-14 23:21:50,894 INFO L226 Difference]: Without dead ends: 230 [2020-10-14 23:21:50,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:21:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-14 23:21:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 179. [2020-10-14 23:21:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 23:21:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 227 transitions. [2020-10-14 23:21:50,947 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 227 transitions. Word has length 46 [2020-10-14 23:21:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:50,948 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 227 transitions. [2020-10-14 23:21:50,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:21:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 227 transitions. [2020-10-14 23:21:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:21:50,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:50,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:21:50,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:21:50,951 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:50,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:50,951 INFO L82 PathProgramCache]: Analyzing trace with hash -669969161, now seen corresponding path program 4 times [2020-10-14 23:21:50,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:50,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276281193] [2020-10-14 23:21:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:51,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:51,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:53,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:53,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:21:53,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:21:53,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2509 [2020-10-14 23:21:53,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:53,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:21:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:21:53,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:53,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:53,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:53,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:53,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:53,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:53,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:53,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:53,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:53,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:53,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:53,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:53,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:53,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276281193] [2020-10-14 23:21:53,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:53,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:21:53,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693544359] [2020-10-14 23:21:53,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:21:53,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:53,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:21:53,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:53,790 INFO L87 Difference]: Start difference. First operand 179 states and 227 transitions. Second operand 13 states. [2020-10-14 23:21:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:21:55,098 INFO L93 Difference]: Finished difference Result 240 states and 305 transitions. [2020-10-14 23:21:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:21:55,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-14 23:21:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:21:55,100 INFO L225 Difference]: With dead ends: 240 [2020-10-14 23:21:55,100 INFO L226 Difference]: Without dead ends: 227 [2020-10-14 23:21:55,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:21:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-14 23:21:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 179. [2020-10-14 23:21:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 23:21:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 228 transitions. [2020-10-14 23:21:55,131 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 228 transitions. Word has length 46 [2020-10-14 23:21:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:21:55,131 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 228 transitions. [2020-10-14 23:21:55,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:21:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 228 transitions. [2020-10-14 23:21:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:21:55,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:21:55,132 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 23:21:55,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:21:55,132 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:21:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:21:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1106885243, now seen corresponding path program 3 times [2020-10-14 23:21:55,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:21:55,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741586040] [2020-10-14 23:21:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:21:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:55,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:55,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:55,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:56,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:56,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:57,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:57,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:58,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:58,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:58,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:21:58,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:21:58,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3796 [2020-10-14 23:21:58,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:58,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:58,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:21:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:21:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:21:58,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:59,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:21:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:21:59,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:21:59,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:21:59,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:21:59,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:21:59,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:21:59,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:21:59,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:21:59,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:21:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:21:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:21:59,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:21:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:21:59,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741586040] [2020-10-14 23:21:59,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:21:59,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:21:59,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131185497] [2020-10-14 23:21:59,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:21:59,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:21:59,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:21:59,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:21:59,238 INFO L87 Difference]: Start difference. First operand 179 states and 228 transitions. Second operand 13 states. [2020-10-14 23:22:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:22:00,157 INFO L93 Difference]: Finished difference Result 238 states and 309 transitions. [2020-10-14 23:22:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:22:00,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-14 23:22:00,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:22:00,160 INFO L225 Difference]: With dead ends: 238 [2020-10-14 23:22:00,160 INFO L226 Difference]: Without dead ends: 221 [2020-10-14 23:22:00,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:22:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-14 23:22:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 157. [2020-10-14 23:22:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 23:22:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 201 transitions. [2020-10-14 23:22:00,185 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 201 transitions. Word has length 46 [2020-10-14 23:22:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:22:00,186 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 201 transitions. [2020-10-14 23:22:00,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:22:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 201 transitions. [2020-10-14 23:22:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 23:22:00,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:22:00,187 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-14 23:22:00,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:22:00,187 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:22:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:22:00,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1980143795, now seen corresponding path program 2 times [2020-10-14 23:22:00,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:22:00,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133031503] [2020-10-14 23:22:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:22:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:00,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:00,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:00,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:00,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:01,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:01,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:04,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:04,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:04,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:04,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:05,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:05,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:05,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 23:22:05,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 23:22:05,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 23:22:05,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:05,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:05,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:22:05,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:22:05,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 23:22:05,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:05,458 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-10-14 23:22:05,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:22:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:05,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:05,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:05,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:22:05,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:22:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:22:05,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:05,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:22:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:22:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:22:05,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:22:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:22:05,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133031503] [2020-10-14 23:22:05,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:22:05,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:22:05,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192428408] [2020-10-14 23:22:05,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:22:05,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:22:05,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:22:05,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:22:05,653 INFO L87 Difference]: Start difference. First operand 157 states and 201 transitions. Second operand 12 states. [2020-10-14 23:22:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:22:06,816 INFO L93 Difference]: Finished difference Result 258 states and 325 transitions. [2020-10-14 23:22:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:22:06,817 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-14 23:22:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:22:06,819 INFO L225 Difference]: With dead ends: 258 [2020-10-14 23:22:06,819 INFO L226 Difference]: Without dead ends: 256 [2020-10-14 23:22:06,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:22:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-14 23:22:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 207. [2020-10-14 23:22:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-14 23:22:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 265 transitions. [2020-10-14 23:22:06,853 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 265 transitions. Word has length 47 [2020-10-14 23:22:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:22:06,853 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 265 transitions. [2020-10-14 23:22:06,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:22:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 265 transitions. [2020-10-14 23:22:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 23:22:06,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:22:06,854 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:22:06,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:22:06,855 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:22:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:22:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1185133947, now seen corresponding path program 6 times [2020-10-14 23:22:06,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:22:06,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325584318] [2020-10-14 23:22:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:22:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:06,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:07,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:07,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:07,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:09,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:09,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:11,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:11,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:11,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 23:22:11,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:22:11,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:22:11,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:11,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:11,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:22:11,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:22:11,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:22:11,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:12,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:22:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:12,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:12,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:22:12,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:22:12,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:22:12,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:12,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:12,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:22:12,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:22:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:22:12,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:22:12,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325584318] [2020-10-14 23:22:12,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:22:12,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:22:12,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930356434] [2020-10-14 23:22:12,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:22:12,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:22:12,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:22:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:22:12,116 INFO L87 Difference]: Start difference. First operand 207 states and 265 transitions. Second operand 15 states. [2020-10-14 23:22:13,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:22:13,058 INFO L93 Difference]: Finished difference Result 364 states and 461 transitions. [2020-10-14 23:22:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:22:13,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-14 23:22:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:22:13,064 INFO L225 Difference]: With dead ends: 364 [2020-10-14 23:22:13,064 INFO L226 Difference]: Without dead ends: 351 [2020-10-14 23:22:13,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:22:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-14 23:22:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 283. [2020-10-14 23:22:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-14 23:22:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 363 transitions. [2020-10-14 23:22:13,114 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 363 transitions. Word has length 49 [2020-10-14 23:22:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:22:13,114 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 363 transitions. [2020-10-14 23:22:13,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:22:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 363 transitions. [2020-10-14 23:22:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 23:22:13,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:22:13,115 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-14 23:22:13,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:22:13,116 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:22:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:22:13,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1186980989, now seen corresponding path program 5 times [2020-10-14 23:22:13,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:22:13,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772254377] [2020-10-14 23:22:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:22:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:13,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:13,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:15,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:18,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:18,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 23:22:18,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:22:18,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 23:22:18,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:18,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:18,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:22:18,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:22:18,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:22:18,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:18,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:22:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:18,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:18,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:18,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:22:18,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:22:18,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:22:18,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:18,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:18,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:22:18,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:22:18,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:22:18,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:22:18,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772254377] [2020-10-14 23:22:18,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:22:18,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:22:18,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743838740] [2020-10-14 23:22:18,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:22:18,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:22:18,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:22:18,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:22:18,651 INFO L87 Difference]: Start difference. First operand 283 states and 363 transitions. Second operand 15 states. [2020-10-14 23:22:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:22:20,343 INFO L93 Difference]: Finished difference Result 462 states and 587 transitions. [2020-10-14 23:22:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:22:20,345 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-14 23:22:20,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:22:20,348 INFO L225 Difference]: With dead ends: 462 [2020-10-14 23:22:20,349 INFO L226 Difference]: Without dead ends: 449 [2020-10-14 23:22:20,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:22:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-14 23:22:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 359. [2020-10-14 23:22:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-14 23:22:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 462 transitions. [2020-10-14 23:22:20,460 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 462 transitions. Word has length 49 [2020-10-14 23:22:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:22:20,461 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 462 transitions. [2020-10-14 23:22:20,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:22:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 462 transitions. [2020-10-14 23:22:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 23:22:20,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:22:20,463 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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] [2020-10-14 23:22:20,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:22:20,464 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:22:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:22:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash 589873415, now seen corresponding path program 4 times [2020-10-14 23:22:20,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:22:20,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522148551] [2020-10-14 23:22:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:22:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:20,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:21,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:22,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:23,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:24,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:25,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:25,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:25,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 23:22:25,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:22:25,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-14 23:22:25,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:25,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:22:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:22:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:22:25,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:25,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:22:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:25,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:25,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:25,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:22:25,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:22:25,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:22:25,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:25,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:22:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:22:25,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:22:25,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:22:25,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522148551] [2020-10-14 23:22:25,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:22:25,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:22:25,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928736282] [2020-10-14 23:22:25,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:22:25,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:22:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:22:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:22:25,930 INFO L87 Difference]: Start difference. First operand 359 states and 462 transitions. Second operand 14 states. [2020-10-14 23:22:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:22:26,780 INFO L93 Difference]: Finished difference Result 436 states and 552 transitions. [2020-10-14 23:22:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:22:26,786 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-14 23:22:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:22:26,789 INFO L225 Difference]: With dead ends: 436 [2020-10-14 23:22:26,789 INFO L226 Difference]: Without dead ends: 419 [2020-10-14 23:22:26,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:22:26,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-10-14 23:22:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 299. [2020-10-14 23:22:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-14 23:22:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 390 transitions. [2020-10-14 23:22:26,850 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 390 transitions. Word has length 49 [2020-10-14 23:22:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:22:26,850 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 390 transitions. [2020-10-14 23:22:26,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:22:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 390 transitions. [2020-10-14 23:22:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:22:26,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:22:26,852 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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] [2020-10-14 23:22:26,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:22:26,852 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:22:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:22:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash 874477233, now seen corresponding path program 3 times [2020-10-14 23:22:26,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:22:26,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013600647] [2020-10-14 23:22:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:22:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:26,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:27,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:27,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:28,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:28,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:29,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:30,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:31,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:31,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:31,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:22:31,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:22:31,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 23:22:31,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:31,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:22:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:22:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:22:31,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:32,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:22:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:32,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:32,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:32,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:22:32,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:22:32,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:22:32,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:32,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:32,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:22:32,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:22:32,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:22:32,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:22:32,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013600647] [2020-10-14 23:22:32,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:22:32,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:22:32,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019431218] [2020-10-14 23:22:32,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:22:32,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:22:32,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:22:32,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:22:32,363 INFO L87 Difference]: Start difference. First operand 299 states and 390 transitions. Second operand 14 states. [2020-10-14 23:22:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:22:33,829 INFO L93 Difference]: Finished difference Result 674 states and 877 transitions. [2020-10-14 23:22:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:22:33,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-14 23:22:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:22:33,833 INFO L225 Difference]: With dead ends: 674 [2020-10-14 23:22:33,833 INFO L226 Difference]: Without dead ends: 657 [2020-10-14 23:22:33,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:22:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-10-14 23:22:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 439. [2020-10-14 23:22:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-10-14 23:22:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 564 transitions. [2020-10-14 23:22:33,923 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 564 transitions. Word has length 50 [2020-10-14 23:22:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:22:33,923 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 564 transitions. [2020-10-14 23:22:33,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:22:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 564 transitions. [2020-10-14 23:22:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:22:33,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:22:33,925 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:22:33,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:22:33,926 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:22:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:22:33,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1645482701, now seen corresponding path program 3 times [2020-10-14 23:22:33,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:22:33,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307896236] [2020-10-14 23:22:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:22:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:34,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:34,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:35,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:35,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:36,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:37,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:37,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:39,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:39,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:39,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:22:39,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:22:39,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5289 [2020-10-14 23:22:39,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:39,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:39,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:22:39,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:22:39,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:22:39,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:39,661 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-14 23:22:39,846 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-10-14 23:22:40,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:22:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:40,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:40,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:40,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:22:40,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:22:40,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:22:40,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:40,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:22:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:22:40,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:22:40,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:22:40,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307896236] [2020-10-14 23:22:40,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:22:40,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:22:40,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013527026] [2020-10-14 23:22:40,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:22:40,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:22:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:22:40,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:22:40,178 INFO L87 Difference]: Start difference. First operand 439 states and 564 transitions. Second operand 15 states. [2020-10-14 23:22:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:22:42,146 INFO L93 Difference]: Finished difference Result 749 states and 968 transitions. [2020-10-14 23:22:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:22:42,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-14 23:22:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:22:42,151 INFO L225 Difference]: With dead ends: 749 [2020-10-14 23:22:42,151 INFO L226 Difference]: Without dead ends: 747 [2020-10-14 23:22:42,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:22:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2020-10-14 23:22:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 471. [2020-10-14 23:22:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-14 23:22:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 620 transitions. [2020-10-14 23:22:42,235 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 620 transitions. Word has length 50 [2020-10-14 23:22:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:22:42,235 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 620 transitions. [2020-10-14 23:22:42,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:22:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 620 transitions. [2020-10-14 23:22:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:22:42,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:22:42,236 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:22:42,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:22:42,236 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:22:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:22:42,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1733625481, now seen corresponding path program 6 times [2020-10-14 23:22:42,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:22:42,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090805619] [2020-10-14 23:22:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:22:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:42,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:44,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:45,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:47,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:47,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:22:47,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:22:47,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 23:22:47,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:47,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:22:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:22:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:22:47,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:47,759 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-14 23:22:47,884 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 23:22:48,181 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-14 23:22:48,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:22:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:48,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:48,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:48,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:22:48,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:22:48,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:22:48,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:48,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:48,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:22:48,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:22:48,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:22:48,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:22:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:22:48,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090805619] [2020-10-14 23:22:48,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:22:48,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:22:48,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82702137] [2020-10-14 23:22:48,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:22:48,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:22:48,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:22:48,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:22:48,536 INFO L87 Difference]: Start difference. First operand 471 states and 620 transitions. Second operand 17 states. [2020-10-14 23:22:49,507 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-14 23:22:49,868 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2020-10-14 23:22:50,163 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2020-10-14 23:22:50,416 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-14 23:22:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:22:51,451 INFO L93 Difference]: Finished difference Result 603 states and 778 transitions. [2020-10-14 23:22:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:22:51,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-14 23:22:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:22:51,455 INFO L225 Difference]: With dead ends: 603 [2020-10-14 23:22:51,455 INFO L226 Difference]: Without dead ends: 590 [2020-10-14 23:22:51,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:22:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-10-14 23:22:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 387. [2020-10-14 23:22:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-14 23:22:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 511 transitions. [2020-10-14 23:22:51,537 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 511 transitions. Word has length 52 [2020-10-14 23:22:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:22:51,538 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 511 transitions. [2020-10-14 23:22:51,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:22:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 511 transitions. [2020-10-14 23:22:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 23:22:51,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:22:51,539 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-14 23:22:51,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:22:51,540 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:22:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:22:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash 17101647, now seen corresponding path program 4 times [2020-10-14 23:22:51,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:22:51,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807509891] [2020-10-14 23:22:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:22:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:51,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:52,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:53,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:54,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:56,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:56,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 23:22:56,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:22:56,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-14 23:22:56,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:56,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:56,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:22:56,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:22:56,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 23:22:56,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:57,090 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-14 23:22:57,231 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-14 23:22:57,376 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-14 23:22:57,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:22:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:22:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:22:57,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:22:57,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:22:57,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:22:57,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:22:57,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:22:57,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:22:57,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:22:57,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:22:57,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:22:57,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:22:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:22:57,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807509891] [2020-10-14 23:22:57,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:22:57,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:22:57,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372496572] [2020-10-14 23:22:57,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:22:57,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:22:57,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:22:57,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:22:57,745 INFO L87 Difference]: Start difference. First operand 387 states and 511 transitions. Second operand 15 states. [2020-10-14 23:22:58,634 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-14 23:22:58,927 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-14 23:22:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:22:59,948 INFO L93 Difference]: Finished difference Result 559 states and 722 transitions. [2020-10-14 23:22:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:22:59,949 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-14 23:22:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:22:59,952 INFO L225 Difference]: With dead ends: 559 [2020-10-14 23:22:59,952 INFO L226 Difference]: Without dead ends: 557 [2020-10-14 23:22:59,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:22:59,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2020-10-14 23:22:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 277. [2020-10-14 23:22:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-14 23:22:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 360 transitions. [2020-10-14 23:22:59,996 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 360 transitions. Word has length 53 [2020-10-14 23:22:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:22:59,996 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 360 transitions. [2020-10-14 23:22:59,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:22:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 360 transitions. [2020-10-14 23:22:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:22:59,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:22:59,997 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:22:59,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:22:59,998 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:22:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:22:59,998 INFO L82 PathProgramCache]: Analyzing trace with hash 923559006, now seen corresponding path program 7 times [2020-10-14 23:22:59,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:22:59,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801886227] [2020-10-14 23:22:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:00,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:00,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:00,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:01,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:03,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:03,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:23:03,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:23:03,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3834 [2020-10-14 23:23:03,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:03,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:23:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 23:23:03,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:04,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:04,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:04,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:04,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:04,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:04,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:23:04,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:04,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:04,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:04,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:04,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:04,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:04,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801886227] [2020-10-14 23:23:04,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:04,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:23:04,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86053205] [2020-10-14 23:23:04,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:23:04,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:04,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:23:04,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:23:04,219 INFO L87 Difference]: Start difference. First operand 277 states and 360 transitions. Second operand 12 states. [2020-10-14 23:23:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:05,133 INFO L93 Difference]: Finished difference Result 500 states and 628 transitions. [2020-10-14 23:23:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:23:05,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-14 23:23:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:05,135 INFO L225 Difference]: With dead ends: 500 [2020-10-14 23:23:05,135 INFO L226 Difference]: Without dead ends: 301 [2020-10-14 23:23:05,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:23:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-14 23:23:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2020-10-14 23:23:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-14 23:23:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 384 transitions. [2020-10-14 23:23:05,188 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 384 transitions. Word has length 56 [2020-10-14 23:23:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:05,188 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 384 transitions. [2020-10-14 23:23:05,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:23:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 384 transitions. [2020-10-14 23:23:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 23:23:05,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:05,190 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:05,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:23:05,190 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:05,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:05,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1925032938, now seen corresponding path program 8 times [2020-10-14 23:23:05,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:05,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543256043] [2020-10-14 23:23:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:05,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:05,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:05,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:06,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:07,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:08,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:09,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:10,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:10,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 23:23:10,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:23:10,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-14 23:23:10,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:10,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:23:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:23:10,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:10,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:10,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:10,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:10,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:10,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:10,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:23:10,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:10,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:10,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:10,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:10,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:10,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:10,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543256043] [2020-10-14 23:23:10,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:10,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:23:10,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45980537] [2020-10-14 23:23:10,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:23:10,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:10,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:23:10,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:23:10,851 INFO L87 Difference]: Start difference. First operand 301 states and 384 transitions. Second operand 15 states. [2020-10-14 23:23:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:12,798 INFO L93 Difference]: Finished difference Result 639 states and 836 transitions. [2020-10-14 23:23:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:23:12,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-14 23:23:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:12,801 INFO L225 Difference]: With dead ends: 639 [2020-10-14 23:23:12,801 INFO L226 Difference]: Without dead ends: 626 [2020-10-14 23:23:12,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:23:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-10-14 23:23:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 527. [2020-10-14 23:23:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-10-14 23:23:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 665 transitions. [2020-10-14 23:23:12,904 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 665 transitions. Word has length 59 [2020-10-14 23:23:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:12,905 INFO L479 AbstractCegarLoop]: Abstraction has 527 states and 665 transitions. [2020-10-14 23:23:12,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:23:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 665 transitions. [2020-10-14 23:23:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 23:23:12,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:12,907 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:12,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:23:12,907 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1923185896, now seen corresponding path program 7 times [2020-10-14 23:23:12,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:12,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947022302] [2020-10-14 23:23:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:12,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:14,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:17,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:17,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 23:23:17,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:23:17,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 23:23:17,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:17,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:17,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:23:17,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:17,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 23:23:17,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:18,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:18,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:18,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:18,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:18,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:18,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:23:18,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:18,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:18,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:18,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:18,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947022302] [2020-10-14 23:23:18,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:18,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:23:18,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348570571] [2020-10-14 23:23:18,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:23:18,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:18,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:23:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:23:18,356 INFO L87 Difference]: Start difference. First operand 527 states and 665 transitions. Second operand 15 states. [2020-10-14 23:23:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:20,012 INFO L93 Difference]: Finished difference Result 634 states and 805 transitions. [2020-10-14 23:23:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:23:20,012 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-14 23:23:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:20,016 INFO L225 Difference]: With dead ends: 634 [2020-10-14 23:23:20,016 INFO L226 Difference]: Without dead ends: 621 [2020-10-14 23:23:20,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:23:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-14 23:23:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 527. [2020-10-14 23:23:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-10-14 23:23:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 666 transitions. [2020-10-14 23:23:20,109 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 666 transitions. Word has length 59 [2020-10-14 23:23:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:20,109 INFO L479 AbstractCegarLoop]: Abstraction has 527 states and 666 transitions. [2020-10-14 23:23:20,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:23:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 666 transitions. [2020-10-14 23:23:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 23:23:20,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:20,110 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:20,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:23:20,110 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:20,110 INFO L82 PathProgramCache]: Analyzing trace with hash -594926996, now seen corresponding path program 5 times [2020-10-14 23:23:20,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:20,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399427285] [2020-10-14 23:23:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:20,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:20,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:22,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:23,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:24,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:24,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:25,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:25,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 23:23:25,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:23:25,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-14 23:23:25,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:25,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:23:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:23:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:25,558 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-14 23:23:25,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:25,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:25,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:25,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:25,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:25,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:23:25,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:25,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:25,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:25,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:25,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:25,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:25,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399427285] [2020-10-14 23:23:25,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:25,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:23:25,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768352989] [2020-10-14 23:23:25,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:23:25,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:25,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:23:25,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:23:25,772 INFO L87 Difference]: Start difference. First operand 527 states and 666 transitions. Second operand 14 states. [2020-10-14 23:23:25,969 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-14 23:23:26,676 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-14 23:23:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:27,359 INFO L93 Difference]: Finished difference Result 610 states and 779 transitions. [2020-10-14 23:23:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:23:27,359 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-14 23:23:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:27,363 INFO L225 Difference]: With dead ends: 610 [2020-10-14 23:23:27,363 INFO L226 Difference]: Without dead ends: 593 [2020-10-14 23:23:27,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:23:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-10-14 23:23:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 471. [2020-10-14 23:23:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-14 23:23:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 599 transitions. [2020-10-14 23:23:27,454 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 599 transitions. Word has length 59 [2020-10-14 23:23:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:27,454 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 599 transitions. [2020-10-14 23:23:27,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:23:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 599 transitions. [2020-10-14 23:23:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:23:27,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:27,456 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:27,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:23:27,456 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:27,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1942689958, now seen corresponding path program 4 times [2020-10-14 23:23:27,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:27,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076539570] [2020-10-14 23:23:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:27,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:27,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:28,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:28,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:29,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:30,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:31,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:32,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:32,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:23:32,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:23:32,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-14 23:23:32,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:32,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:23:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 23:23:32,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:32,944 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-14 23:23:33,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:33,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:33,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:33,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:33,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:23:33,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:33,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:33,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:33,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:33,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:33,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:33,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076539570] [2020-10-14 23:23:33,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:33,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:23:33,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572488257] [2020-10-14 23:23:33,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:23:33,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:23:33,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:23:33,222 INFO L87 Difference]: Start difference. First operand 471 states and 599 transitions. Second operand 15 states. [2020-10-14 23:23:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:35,282 INFO L93 Difference]: Finished difference Result 913 states and 1176 transitions. [2020-10-14 23:23:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:23:35,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-14 23:23:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:35,287 INFO L225 Difference]: With dead ends: 913 [2020-10-14 23:23:35,287 INFO L226 Difference]: Without dead ends: 900 [2020-10-14 23:23:35,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:23:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2020-10-14 23:23:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 695. [2020-10-14 23:23:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-14 23:23:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 877 transitions. [2020-10-14 23:23:35,472 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 877 transitions. Word has length 60 [2020-10-14 23:23:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:35,473 INFO L479 AbstractCegarLoop]: Abstraction has 695 states and 877 transitions. [2020-10-14 23:23:35,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:23:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 877 transitions. [2020-10-14 23:23:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:23:35,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:35,475 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-14 23:23:35,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:23:35,475 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash -577269976, now seen corresponding path program 5 times [2020-10-14 23:23:35,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:35,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447973964] [2020-10-14 23:23:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:35,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:36,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:36,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:37,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:40,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:40,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:40,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:23:40,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:23:40,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-14 23:23:40,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:40,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:40,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:23:40,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:40,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:23:40,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:41,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:41,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:41,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:41,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:41,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:41,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:23:41,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:41,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:41,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447973964] [2020-10-14 23:23:41,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:41,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:23:41,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325540002] [2020-10-14 23:23:41,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:23:41,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:41,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:23:41,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:23:41,033 INFO L87 Difference]: Start difference. First operand 695 states and 877 transitions. Second operand 14 states. [2020-10-14 23:23:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:42,673 INFO L93 Difference]: Finished difference Result 1003 states and 1239 transitions. [2020-10-14 23:23:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:23:42,674 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-14 23:23:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:42,678 INFO L225 Difference]: With dead ends: 1003 [2020-10-14 23:23:42,679 INFO L226 Difference]: Without dead ends: 1001 [2020-10-14 23:23:42,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:23:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2020-10-14 23:23:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 799. [2020-10-14 23:23:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2020-10-14 23:23:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1005 transitions. [2020-10-14 23:23:42,835 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1005 transitions. Word has length 60 [2020-10-14 23:23:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:42,835 INFO L479 AbstractCegarLoop]: Abstraction has 799 states and 1005 transitions. [2020-10-14 23:23:42,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:23:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1005 transitions. [2020-10-14 23:23:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:23:42,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:42,837 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-14 23:23:42,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:23:42,838 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:42,838 INFO L82 PathProgramCache]: Analyzing trace with hash -302864162, now seen corresponding path program 9 times [2020-10-14 23:23:42,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:42,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679591623] [2020-10-14 23:23:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:44,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:47,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:47,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:23:47,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:23:47,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:23:47,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:47,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:47,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:23:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 23:23:47,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:48,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:48,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:48,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:48,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:48,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:48,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:23:48,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:48,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:48,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:48,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:48,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:48,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:48,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679591623] [2020-10-14 23:23:48,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:48,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:23:48,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784586993] [2020-10-14 23:23:48,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:23:48,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:48,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:23:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:23:48,288 INFO L87 Difference]: Start difference. First operand 799 states and 1005 transitions. Second operand 17 states. [2020-10-14 23:23:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:50,304 INFO L93 Difference]: Finished difference Result 1203 states and 1508 transitions. [2020-10-14 23:23:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:23:50,305 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-10-14 23:23:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:50,309 INFO L225 Difference]: With dead ends: 1203 [2020-10-14 23:23:50,309 INFO L226 Difference]: Without dead ends: 1190 [2020-10-14 23:23:50,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:23:50,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2020-10-14 23:23:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1037. [2020-10-14 23:23:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2020-10-14 23:23:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1310 transitions. [2020-10-14 23:23:50,499 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1310 transitions. Word has length 62 [2020-10-14 23:23:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:50,499 INFO L479 AbstractCegarLoop]: Abstraction has 1037 states and 1310 transitions. [2020-10-14 23:23:50,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:23:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1310 transitions. [2020-10-14 23:23:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:23:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:50,501 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:50,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:23:50,502 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash -304711204, now seen corresponding path program 8 times [2020-10-14 23:23:50,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:50,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567744899] [2020-10-14 23:23:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:50,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:51,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:55,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:55,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:23:55,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:23:55,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5291 [2020-10-14 23:23:55,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:55,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:55,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:23:55,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:55,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 23:23:55,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:56,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:56,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:56,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:56,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:56,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:56,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:23:56,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:56,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:56,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:56,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567744899] [2020-10-14 23:23:56,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:56,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:23:56,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251803973] [2020-10-14 23:23:56,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:23:56,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:23:56,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:23:56,358 INFO L87 Difference]: Start difference. First operand 1037 states and 1310 transitions. Second operand 17 states. [2020-10-14 23:23:57,357 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:23:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:58,682 INFO L93 Difference]: Finished difference Result 1558 states and 1964 transitions. [2020-10-14 23:23:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:23:58,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-10-14 23:23:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:58,688 INFO L225 Difference]: With dead ends: 1558 [2020-10-14 23:23:58,688 INFO L226 Difference]: Without dead ends: 1545 [2020-10-14 23:23:58,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:23:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-10-14 23:23:58,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1275. [2020-10-14 23:23:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1275 states. [2020-10-14 23:23:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 1616 transitions. [2020-10-14 23:23:58,939 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 1616 transitions. Word has length 62 [2020-10-14 23:23:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:58,940 INFO L479 AbstractCegarLoop]: Abstraction has 1275 states and 1616 transitions. [2020-10-14 23:23:58,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:23:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 1616 transitions. [2020-10-14 23:23:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:23:58,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:58,942 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:58,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:23:58,943 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:58,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:58,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1472143200, now seen corresponding path program 6 times [2020-10-14 23:23:58,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:58,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932311631] [2020-10-14 23:23:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:59,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:00,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:03,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:04,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:04,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:24:04,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:24:04,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-14 23:24:04,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:04,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:04,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:24:04,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:24:04,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 23:24:04,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:24:04,425 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-14 23:24:04,569 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-14 23:24:04,722 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-14 23:24:04,870 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-14 23:24:05,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:05,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:05,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:05,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:05,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:05,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:24:05,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:05,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:05,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:05,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:05,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:05,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:24:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:05,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932311631] [2020-10-14 23:24:05,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:05,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:24:05,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508715946] [2020-10-14 23:24:05,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:24:05,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:24:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:24:05,227 INFO L87 Difference]: Start difference. First operand 1275 states and 1616 transitions. Second operand 16 states. [2020-10-14 23:24:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:07,569 INFO L93 Difference]: Finished difference Result 1424 states and 1816 transitions. [2020-10-14 23:24:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:24:07,570 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-14 23:24:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:07,576 INFO L225 Difference]: With dead ends: 1424 [2020-10-14 23:24:07,576 INFO L226 Difference]: Without dead ends: 1407 [2020-10-14 23:24:07,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:24:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2020-10-14 23:24:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1085. [2020-10-14 23:24:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1085 states. [2020-10-14 23:24:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1394 transitions. [2020-10-14 23:24:07,788 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1394 transitions. Word has length 62 [2020-10-14 23:24:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:07,789 INFO L479 AbstractCegarLoop]: Abstraction has 1085 states and 1394 transitions. [2020-10-14 23:24:07,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:24:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1394 transitions. [2020-10-14 23:24:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:24:07,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:07,791 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:07,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:24:07,791 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:07,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1731408546, now seen corresponding path program 5 times [2020-10-14 23:24:07,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:07,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639791715] [2020-10-14 23:24:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:07,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:08,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:10,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:11,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:13,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:13,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:24:13,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:24:13,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5393 [2020-10-14 23:24:13,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:13,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:13,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:24:13,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:24:13,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 23:24:13,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:24:13,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:24:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:24:13,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:24:13,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:24:13,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:24:13,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:24:13,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:24:13,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:24:13,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:24:13,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:24:13,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:24:13,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:24:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:24:13,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639791715] [2020-10-14 23:24:13,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:24:13,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:24:13,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272111220] [2020-10-14 23:24:13,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:24:13,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:24:13,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:24:13,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:24:13,676 INFO L87 Difference]: Start difference. First operand 1085 states and 1394 transitions. Second operand 16 states. [2020-10-14 23:24:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:24:16,199 INFO L93 Difference]: Finished difference Result 1800 states and 2329 transitions. [2020-10-14 23:24:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:24:16,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-14 23:24:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:24:16,207 INFO L225 Difference]: With dead ends: 1800 [2020-10-14 23:24:16,207 INFO L226 Difference]: Without dead ends: 1787 [2020-10-14 23:24:16,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:24:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2020-10-14 23:24:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1321. [2020-10-14 23:24:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1321 states. [2020-10-14 23:24:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1696 transitions. [2020-10-14 23:24:16,749 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1696 transitions. Word has length 63 [2020-10-14 23:24:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:24:16,749 INFO L479 AbstractCegarLoop]: Abstraction has 1321 states and 1696 transitions. [2020-10-14 23:24:16,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:24:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1696 transitions. [2020-10-14 23:24:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:24:16,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:24:16,752 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:24:16,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:24:16,752 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:24:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:24:16,753 INFO L82 PathProgramCache]: Analyzing trace with hash -788551388, now seen corresponding path program 6 times [2020-10-14 23:24:16,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:24:16,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338067941] [2020-10-14 23:24:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:24:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:24:16,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking...