/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=NARROWEST --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/list-properties/list_flag-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:35:10,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:35:10,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:35:10,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:35:10,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:35:10,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:35:10,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:35:10,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:35:10,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:35:10,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:35:10,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:35:10,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:35:10,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:35:10,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:35:10,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:35:10,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:35:10,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:35:10,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:35:10,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:35:10,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:35:10,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:35:10,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:35:10,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:35:10,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:35:10,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:35:10,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:35:10,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:35:10,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:35:10,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:35:10,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:35:10,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:35:10,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:35:10,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:35:10,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:35:10,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:35:10,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:35:10,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:35:10,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:35:10,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:35:10,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:35:10,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:35:10,233 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 [2020-10-13 10:35:10,280 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:35:10,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:35:10,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:35:10,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:35:10,284 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:35:10,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:35:10,284 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:35:10,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:35:10,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:35:10,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:35:10,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:35:10,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:35:10,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:35:10,285 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:35:10,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:35:10,286 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:35:10,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:35:10,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:35:10,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:35:10,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:35:10,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:35:10,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:35:10,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:35:10,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:35:10,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:35:10,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:35:10,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:35:10,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:35:10,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:35:10,290 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:35:10,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:35:10,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:35:10,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:35:10,606 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:35:10,608 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:35:10,608 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-2.i [2020-10-13 10:35:10,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/489044c4f/c7907aebdb664ce382468b6f78f2f935/FLAG62c09d0da [2020-10-13 10:35:11,157 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:35:11,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_flag-2.i [2020-10-13 10:35:11,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/489044c4f/c7907aebdb664ce382468b6f78f2f935/FLAG62c09d0da [2020-10-13 10:35:11,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/489044c4f/c7907aebdb664ce382468b6f78f2f935 [2020-10-13 10:35:11,473 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:35:11,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:35:11,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:35:11,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:35:11,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:35:11,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:35:11" (1/1) ... [2020-10-13 10:35:11,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c8794a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:11, skipping insertion in model container [2020-10-13 10:35:11,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:35:11" (1/1) ... [2020-10-13 10:35:11,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:35:11,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:35:11,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:35:11,927 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:35:11,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:35:12,035 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:35:12,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12 WrapperNode [2020-10-13 10:35:12,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:35:12,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:35:12,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:35:12,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:35:12,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12" (1/1) ... [2020-10-13 10:35:12,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12" (1/1) ... [2020-10-13 10:35:12,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12" (1/1) ... [2020-10-13 10:35:12,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12" (1/1) ... [2020-10-13 10:35:12,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12" (1/1) ... [2020-10-13 10:35:12,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12" (1/1) ... [2020-10-13 10:35:12,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12" (1/1) ... [2020-10-13 10:35:12,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:35:12,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:35:12,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:35:12,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:35:12,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12" (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 [2020-10-13 10:35:12,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:35:12,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:35:12,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:35:12,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:35:12,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-13 10:35:12,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-13 10:35:12,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-13 10:35:12,208 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-13 10:35:12,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:35:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:35:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:35:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:35:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:35:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:35:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:35:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:35:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:35:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:35:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:35:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:35:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:35:12,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:35:12,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:35:12,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:35:12,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:35:12,211 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:35:12,212 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:35:12,212 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:35:12,212 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:35:12,212 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-13 10:35:12,212 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-13 10:35:12,212 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-13 10:35:12,212 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:35:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:35:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:35:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:35:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:35:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:35:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:35:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:35:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:35:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:35:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:35:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:35:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:35:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:35:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:35:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:35:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:35:12,215 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:35:12,215 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:35:12,215 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:35:12,215 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:35:12,215 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:35:12,215 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:35:12,215 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:35:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:35:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:35:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:35:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:35:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:35:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:35:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:35:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:35:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:35:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:35:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:35:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:35:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:35:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:35:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:35:12,218 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:35:12,218 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:35:12,218 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:35:12,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:35:12,218 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:35:12,218 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:35:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:35:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:35:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:35:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:35:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:35:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:35:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:35:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:35:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:35:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:35:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:35:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:35:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:35:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:35:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:35:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:35:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:35:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:35:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:35:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:35:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:35:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:35:12,223 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-13 10:35:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:35:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:35:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:35:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:35:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:35:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:35:12,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:35:12,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:35:12,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:35:12,581 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-13 10:35:12,717 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:35:12,717 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 10:35:12,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:35:12 BoogieIcfgContainer [2020-10-13 10:35:12,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:35:12,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:35:12,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:35:12,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:35:12,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:35:11" (1/3) ... [2020-10-13 10:35:12,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ebe2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:35:12, skipping insertion in model container [2020-10-13 10:35:12,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:12" (2/3) ... [2020-10-13 10:35:12,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ebe2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:35:12, skipping insertion in model container [2020-10-13 10:35:12,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:35:12" (3/3) ... [2020-10-13 10:35:12,730 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2020-10-13 10:35:12,741 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:35:12,748 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:35:12,763 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:35:12,787 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:35:12,788 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:35:12,788 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:35:12,788 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:35:12,788 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:35:12,788 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:35:12,789 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:35:12,789 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:35:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-13 10:35:12,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:35:12,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:12,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:12,815 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1184417696, now seen corresponding path program 1 times [2020-10-13 10:35:12,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:12,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395758965] [2020-10-13 10:35:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:12,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:13,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:13,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:13,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:13,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:35:13,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:35:13,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-13 10:35:13,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:35:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:13,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:35:13,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:13,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:13,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:13,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:13,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:13,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:35:13,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:13,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:13,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:13,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:13,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:13,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395758965] [2020-10-13 10:35:13,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:13,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:35:13,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733062906] [2020-10-13 10:35:13,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:35:13,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:13,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:35:13,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:35:13,369 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-13 10:35:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:13,463 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-10-13 10:35:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:35:13,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 10:35:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:13,472 INFO L225 Difference]: With dead ends: 46 [2020-10-13 10:35:13,473 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:35:13,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:35:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:35:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 10:35:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:35:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-13 10:35:13,505 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-10-13 10:35:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:13,505 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-13 10:35:13,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:35:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-13 10:35:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:35:13,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:13,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:13,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:35:13,507 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:13,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:13,508 INFO L82 PathProgramCache]: Analyzing trace with hash -218242506, now seen corresponding path program 1 times [2020-10-13 10:35:13,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:13,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562777294] [2020-10-13 10:35:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:13,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:13,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:13,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:35:13,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:13,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 10:35:13,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:13,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:35:13,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:35:13,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:35:13,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:13,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:13,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:13,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:13,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:13,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:35:13,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:13,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:13,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562777294] [2020-10-13 10:35:13,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:13,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:35:13,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292784982] [2020-10-13 10:35:13,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:35:13,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:35:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:35:13,687 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-10-13 10:35:13,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:13,806 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-13 10:35:13,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:35:13,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 10:35:13,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:13,808 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:35:13,809 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:35:13,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:35:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:35:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-13 10:35:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:35:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-13 10:35:13,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17 [2020-10-13 10:35:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:13,818 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-13 10:35:13,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:35:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-13 10:35:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:35:13,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:13,820 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:13,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:35:13,820 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:13,821 INFO L82 PathProgramCache]: Analyzing trace with hash 771025649, now seen corresponding path program 1 times [2020-10-13 10:35:13,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:13,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482843867] [2020-10-13 10:35:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:13,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:13,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:13,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:35:13,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 10:35:13,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:35:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:35:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:35:13,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:13,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:13,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:13,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:13,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:13,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:13,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:35:13,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:13,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:13,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:13,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:13,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:13,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482843867] [2020-10-13 10:35:13,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:13,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:35:13,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888271855] [2020-10-13 10:35:13,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:35:13,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:35:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:35:13,996 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2020-10-13 10:35:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:14,109 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 10:35:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:35:14,109 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 10:35:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:14,110 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:35:14,111 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:35:14,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:35:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:35:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-10-13 10:35:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:35:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-13 10:35:14,118 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2020-10-13 10:35:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:14,118 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-13 10:35:14,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:35:14,118 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-13 10:35:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:35:14,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:14,119 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:14,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:35:14,120 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:14,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:14,120 INFO L82 PathProgramCache]: Analyzing trace with hash -472715872, now seen corresponding path program 1 times [2020-10-13 10:35:14,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:14,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934481365] [2020-10-13 10:35:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:14,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:14,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:14,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:35:14,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:14,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-13 10:35:14,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:35:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:35:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:35:14,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:14,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:14,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:14,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:14,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:14,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:14,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:14,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:14,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:14,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:14,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:14,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934481365] [2020-10-13 10:35:14,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:14,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:35:14,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725340673] [2020-10-13 10:35:14,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:35:14,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:14,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:35:14,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:35:14,248 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-10-13 10:35:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:14,367 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-13 10:35:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:35:14,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 10:35:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:14,368 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:35:14,369 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:35:14,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:35:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:35:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2020-10-13 10:35:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:35:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-13 10:35:14,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-10-13 10:35:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:14,375 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-13 10:35:14,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:35:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-13 10:35:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:35:14,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:14,376 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] [2020-10-13 10:35:14,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:35:14,377 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:14,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1962636917, now seen corresponding path program 1 times [2020-10-13 10:35:14,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:14,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63421316] [2020-10-13 10:35:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:14,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:14,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:14,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:35:14,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:14,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 10:35:14,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:35:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:35:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:35:14,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:14,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:14,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:14,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:14,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:14,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:14,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:14,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:14,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:14,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:14,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:14,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:14,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63421316] [2020-10-13 10:35:14,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:14,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:35:14,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622611700] [2020-10-13 10:35:14,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:35:14,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:14,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:35:14,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:35:14,474 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-13 10:35:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:14,528 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-13 10:35:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:35:14,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-13 10:35:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:14,530 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:35:14,530 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:35:14,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:35:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:35:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-13 10:35:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 10:35:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-13 10:35:14,536 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-10-13 10:35:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:14,536 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-13 10:35:14,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:35:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-13 10:35:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:35:14,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:14,538 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] [2020-10-13 10:35:14,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:35:14,538 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:14,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1888593434, now seen corresponding path program 1 times [2020-10-13 10:35:14,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:14,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027208653] [2020-10-13 10:35:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:14,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:14,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:14,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:14,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:35:14,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:35:14,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-13 10:35:14,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:35:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:35:14,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:14,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:14,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:14,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:14,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:14,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:14,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:35:14,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:14,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:14,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027208653] [2020-10-13 10:35:14,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:14,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:35:14,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28458382] [2020-10-13 10:35:14,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:35:14,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:14,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:35:14,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:35:14,962 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 10 states. [2020-10-13 10:35:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:15,232 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-13 10:35:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:35:15,233 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-13 10:35:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:15,234 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:35:15,234 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:35:15,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:35:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-10-13 10:35:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:35:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-13 10:35:15,242 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 23 [2020-10-13 10:35:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:15,242 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-13 10:35:15,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:35:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-13 10:35:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:35:15,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:15,244 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] [2020-10-13 10:35:15,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:35:15,244 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:15,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1745524365, now seen corresponding path program 1 times [2020-10-13 10:35:15,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:15,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578956945] [2020-10-13 10:35:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:15,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:15,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:15,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:15,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:35:15,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:35:15,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-13 10:35:15,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:35:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:35:15,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:15,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:15,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:15,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:15,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:15,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:15,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:15,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:15,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:15,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:15,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:15,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:15,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578956945] [2020-10-13 10:35:15,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:15,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:35:15,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970498982] [2020-10-13 10:35:15,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:35:15,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:35:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:35:15,659 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 10 states. [2020-10-13 10:35:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:15,929 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-10-13 10:35:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:35:15,929 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-13 10:35:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:15,932 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:35:15,933 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:35:15,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:35:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-13 10:35:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:35:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-13 10:35:15,942 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 23 [2020-10-13 10:35:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:15,942 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-13 10:35:15,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:35:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-13 10:35:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:35:15,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:15,943 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] [2020-10-13 10:35:15,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:35:15,944 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:15,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1301787420, now seen corresponding path program 1 times [2020-10-13 10:35:15,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:15,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273919173] [2020-10-13 10:35:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:15,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:15,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:15,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:35:15,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:15,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 10:35:15,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:15,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:35:15,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:35:15,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:35:15,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:16,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:16,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:16,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:16,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:16,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:16,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:16,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:16,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:16,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:16,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:16,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:16,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273919173] [2020-10-13 10:35:16,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:16,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:35:16,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874235976] [2020-10-13 10:35:16,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:35:16,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:35:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:35:16,016 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 4 states. [2020-10-13 10:35:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:16,068 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-13 10:35:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:35:16,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-13 10:35:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:16,070 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:35:16,070 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:35:16,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:35:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:35:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-13 10:35:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:35:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-13 10:35:16,076 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 23 [2020-10-13 10:35:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:16,076 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-13 10:35:16,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:35:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-13 10:35:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:35:16,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:16,078 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:16,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:35:16,078 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:16,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:16,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1798499403, now seen corresponding path program 1 times [2020-10-13 10:35:16,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:16,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186687115] [2020-10-13 10:35:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:16,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:16,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:16,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:35:16,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:16,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 10:35:16,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:16,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:35:16,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:16,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:35:16,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:16,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:16,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:16,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:16,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:16,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:16,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:16,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:16,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186687115] [2020-10-13 10:35:16,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:16,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:35:16,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374926636] [2020-10-13 10:35:16,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:35:16,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:16,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:35:16,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:35:16,322 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 10 states. [2020-10-13 10:35:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:16,564 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-10-13 10:35:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:35:16,565 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-13 10:35:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:16,566 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:35:16,567 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:35:16,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:35:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2020-10-13 10:35:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:35:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-13 10:35:16,574 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2020-10-13 10:35:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:16,575 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-13 10:35:16,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:35:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-13 10:35:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:35:16,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:16,577 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:16,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:35:16,577 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1746696560, now seen corresponding path program 2 times [2020-10-13 10:35:16,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:16,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816360825] [2020-10-13 10:35:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:16,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:16,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:16,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:35:16,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:16,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-13 10:35:16,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:16,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:35:16,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:16,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:35:16,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:16,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:16,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:16,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:16,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:16,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:16,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:16,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:16,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:16,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:16,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816360825] [2020-10-13 10:35:16,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:16,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:35:16,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044871565] [2020-10-13 10:35:16,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:35:16,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:35:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:35:16,876 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 10 states. [2020-10-13 10:35:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:17,094 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-13 10:35:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:35:17,094 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-13 10:35:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:17,095 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:35:17,095 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:35:17,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:35:17,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2020-10-13 10:35:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:35:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-13 10:35:17,101 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 27 [2020-10-13 10:35:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:17,102 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-13 10:35:17,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:35:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-13 10:35:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:35:17,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:17,103 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:17,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:35:17,103 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:17,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:17,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2086051389, now seen corresponding path program 1 times [2020-10-13 10:35:17,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:17,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891327132] [2020-10-13 10:35:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:17,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:17,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:17,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:35:17,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:17,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 10:35:17,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:17,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:35:17,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:17,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:35:17,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:17,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:17,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:17,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:17,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:17,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:17,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:17,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:17,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:17,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:17,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:17,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:17,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891327132] [2020-10-13 10:35:17,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:17,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:35:17,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828230610] [2020-10-13 10:35:17,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:35:17,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:17,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:35:17,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:35:17,319 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 10 states. [2020-10-13 10:35:17,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:17,534 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-13 10:35:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:35:17,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-13 10:35:17,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:17,536 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:35:17,536 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:35:17,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:35:17,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2020-10-13 10:35:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:35:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-13 10:35:17,541 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 27 [2020-10-13 10:35:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:17,541 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-13 10:35:17,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:35:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-13 10:35:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:35:17,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:17,545 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] [2020-10-13 10:35:17,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:35:17,547 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:17,548 INFO L82 PathProgramCache]: Analyzing trace with hash 758167983, now seen corresponding path program 2 times [2020-10-13 10:35:17,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:17,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541090001] [2020-10-13 10:35:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:17,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:17,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:17,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:17,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:35:17,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:35:17,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-13 10:35:17,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:35:17,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:17,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:35:17,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:18,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:18,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:18,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:18,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:18,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:18,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:18,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:18,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:18,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:18,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:18,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:18,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541090001] [2020-10-13 10:35:18,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:18,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:35:18,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692282177] [2020-10-13 10:35:18,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:35:18,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:18,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:35:18,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:35:18,128 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 12 states. [2020-10-13 10:35:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:18,282 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-13 10:35:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:35:18,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-13 10:35:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:18,284 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:35:18,284 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:35:18,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:35:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-13 10:35:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:35:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-13 10:35:18,289 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 29 [2020-10-13 10:35:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:18,289 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-13 10:35:18,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:35:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-13 10:35:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:35:18,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:18,290 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] [2020-10-13 10:35:18,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:35:18,291 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:18,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:18,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1073844828, now seen corresponding path program 2 times [2020-10-13 10:35:18,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:18,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267346506] [2020-10-13 10:35:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:18,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:18,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:18,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:18,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:35:18,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:35:18,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-13 10:35:18,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:18,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:35:18,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:18,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:35:18,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:18,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:18,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:18,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:18,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:18,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:18,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:18,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:18,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:18,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:18,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:18,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267346506] [2020-10-13 10:35:18,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:18,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:35:18,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793312591] [2020-10-13 10:35:18,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:35:18,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:18,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:35:18,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:35:18,710 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2020-10-13 10:35:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:18,883 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-13 10:35:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:35:18,884 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-13 10:35:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:18,885 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:35:18,885 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:35:18,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:35:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 10:35:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:35:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-13 10:35:18,890 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-10-13 10:35:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:18,891 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-13 10:35:18,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:35:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-13 10:35:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:35:18,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:18,892 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] [2020-10-13 10:35:18,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:35:18,892 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:18,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1510631926, now seen corresponding path program 3 times [2020-10-13 10:35:18,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:18,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899261701] [2020-10-13 10:35:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:18,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:19,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:19,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:35:19,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:19,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-13 10:35:19,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:19,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:35:19,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:19,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:35:19,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:19,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:19,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:19,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:19,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:19,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:19,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:19,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:19,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:19,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:19,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:19,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:19,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899261701] [2020-10-13 10:35:19,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:19,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:35:19,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040396607] [2020-10-13 10:35:19,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:35:19,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:35:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:35:19,352 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 13 states. [2020-10-13 10:35:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:19,761 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-13 10:35:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:35:19,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-13 10:35:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:19,762 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:35:19,762 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 10:35:19,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:35:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 10:35:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-10-13 10:35:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:35:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-13 10:35:19,770 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 31 [2020-10-13 10:35:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:19,771 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-13 10:35:19,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:35:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-13 10:35:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:35:19,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:19,772 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] [2020-10-13 10:35:19,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:35:19,773 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1124052257, now seen corresponding path program 2 times [2020-10-13 10:35:19,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:19,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604565307] [2020-10-13 10:35:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:19,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:19,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:19,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:35:19,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:19,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-13 10:35:19,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:19,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:35:19,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:19,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:35:19,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:20,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:20,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:20,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:20,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:20,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:20,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:20,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:20,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:20,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:20,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:20,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:20,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604565307] [2020-10-13 10:35:20,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:20,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:35:20,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599101627] [2020-10-13 10:35:20,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:35:20,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:20,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:35:20,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:35:20,170 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 13 states. [2020-10-13 10:35:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:20,571 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-10-13 10:35:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:35:20,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-13 10:35:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:20,575 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:35:20,575 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:35:20,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:35:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:35:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-13 10:35:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:35:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-13 10:35:20,581 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 31 [2020-10-13 10:35:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:20,581 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-13 10:35:20,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:35:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-13 10:35:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:35:20,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:20,582 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:20,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:35:20,582 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:20,583 INFO L82 PathProgramCache]: Analyzing trace with hash 16041893, now seen corresponding path program 4 times [2020-10-13 10:35:20,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:20,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096134410] [2020-10-13 10:35:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:20,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:20,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:20,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:35:20,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:20,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-13 10:35:20,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:20,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:35:20,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:35:20,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:21,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:21,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:21,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:21,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:21,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:21,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:21,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:21,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:21,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:21,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:21,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096134410] [2020-10-13 10:35:21,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:21,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:35:21,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249577640] [2020-10-13 10:35:21,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:35:21,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:21,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:35:21,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:35:21,166 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 13 states. [2020-10-13 10:35:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:21,688 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2020-10-13 10:35:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:35:21,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-13 10:35:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:21,690 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:35:21,690 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:35:21,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:35:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:35:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-13 10:35:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:35:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-13 10:35:21,697 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 33 [2020-10-13 10:35:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:21,697 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-13 10:35:21,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:35:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-13 10:35:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:35:21,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:21,698 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] [2020-10-13 10:35:21,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:35:21,698 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1729233280, now seen corresponding path program 5 times [2020-10-13 10:35:21,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:21,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844141683] [2020-10-13 10:35:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:21,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:21,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:21,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:35:21,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:21,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-13 10:35:21,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:35:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:21,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:35:21,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:22,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:22,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:22,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:22,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:22,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:22,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:22,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:22,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:22,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:22,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:22,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:22,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844141683] [2020-10-13 10:35:22,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:22,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:35:22,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160857279] [2020-10-13 10:35:22,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:35:22,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:22,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:35:22,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:35:22,236 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 13 states. [2020-10-13 10:35:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:22,783 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-10-13 10:35:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:35:22,784 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-13 10:35:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:22,785 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:35:22,785 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:35:22,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:35:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:35:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-13 10:35:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:35:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-13 10:35:22,793 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 35 [2020-10-13 10:35:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:22,793 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-13 10:35:22,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:35:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-13 10:35:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:35:22,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:22,794 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] [2020-10-13 10:35:22,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:35:22,794 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:22,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1276861163, now seen corresponding path program 3 times [2020-10-13 10:35:22,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:22,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820232724] [2020-10-13 10:35:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:22,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:23,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:23,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:35:23,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:23,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-13 10:35:23,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:23,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:35:23,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:23,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:35:23,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:23,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:23,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:23,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:23,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:23,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:23,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:23,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:23,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:23,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820232724] [2020-10-13 10:35:23,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:23,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:35:23,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116146841] [2020-10-13 10:35:23,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:35:23,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:23,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:35:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:35:23,283 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 13 states. [2020-10-13 10:35:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:23,811 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-10-13 10:35:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:35:23,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-13 10:35:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:23,812 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:35:23,812 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 10:35:23,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:35:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 10:35:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-13 10:35:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:35:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-13 10:35:23,822 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 35 [2020-10-13 10:35:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:23,822 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-13 10:35:23,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:35:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-13 10:35:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:35:23,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:23,823 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:23,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:35:23,823 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1280949089, now seen corresponding path program 6 times [2020-10-13 10:35:23,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:23,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044554927] [2020-10-13 10:35:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:23,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:24,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:24,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:35:24,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:24,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-13 10:35:24,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:24,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:35:24,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:24,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:35:24,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:24,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:24,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:24,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:24,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:24,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:24,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:24,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:24,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:24,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:24,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:24,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:24,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044554927] [2020-10-13 10:35:24,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:24,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:35:24,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484390960] [2020-10-13 10:35:24,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:35:24,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:24,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:35:24,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:24,540 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 15 states. [2020-10-13 10:35:24,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:24,941 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-10-13 10:35:24,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:35:24,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-13 10:35:24,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:24,942 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:35:24,942 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:35:24,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:35:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:35:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-13 10:35:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:35:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-13 10:35:24,949 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 37 [2020-10-13 10:35:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:24,949 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-13 10:35:24,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:35:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-13 10:35:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:35:24,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:24,951 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:24,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:35:24,951 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:24,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1028858614, now seen corresponding path program 4 times [2020-10-13 10:35:24,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:24,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356340313] [2020-10-13 10:35:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:24,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:25,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:25,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:35:25,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:25,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-13 10:35:25,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:25,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:35:25,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:25,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:35:25,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:25,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:25,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:25,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:25,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:25,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:25,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:25,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:25,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:25,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:25,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356340313] [2020-10-13 10:35:25,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:25,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:35:25,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298510804] [2020-10-13 10:35:25,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:35:25,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:25,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:35:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:25,574 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 15 states. [2020-10-13 10:35:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:26,078 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-10-13 10:35:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:35:26,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-13 10:35:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:26,079 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:35:26,079 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:35:26,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:35:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:35:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 10:35:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:35:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-13 10:35:26,085 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 37 [2020-10-13 10:35:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:26,085 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-13 10:35:26,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:35:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-13 10:35:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:35:26,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:26,086 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:26,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:35:26,086 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:26,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1697916154, now seen corresponding path program 7 times [2020-10-13 10:35:26,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:26,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256660320] [2020-10-13 10:35:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:26,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:26,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:35:26,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:26,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-13 10:35:26,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:26,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:35:26,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:26,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:35:26,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:27,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:27,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:27,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:27,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:27,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:27,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:27,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:27,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:27,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:27,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:27,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:27,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256660320] [2020-10-13 10:35:27,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:27,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:35:27,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110437897] [2020-10-13 10:35:27,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:35:27,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:27,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:35:27,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:35:27,161 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 16 states. [2020-10-13 10:35:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:28,056 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-13 10:35:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:35:28,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-13 10:35:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:28,058 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:35:28,058 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:35:28,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:35:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:35:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-10-13 10:35:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:35:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2020-10-13 10:35:28,065 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 39 [2020-10-13 10:35:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:28,066 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2020-10-13 10:35:28,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:35:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2020-10-13 10:35:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:35:28,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:28,067 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:28,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:35:28,067 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash 939326385, now seen corresponding path program 5 times [2020-10-13 10:35:28,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:28,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662246099] [2020-10-13 10:35:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:28,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:28,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:28,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:35:28,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:28,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-13 10:35:28,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:28,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:35:28,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:28,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:35:28,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 29 [2020-10-13 10:35:28,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:28,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:28,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:28,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:28,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:28,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:28,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:28,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:28,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662246099] [2020-10-13 10:35:28,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:28,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:35:28,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988759343] [2020-10-13 10:35:28,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:35:28,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:35:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:35:28,952 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 16 states. [2020-10-13 10:35:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:29,899 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-10-13 10:35:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:35:29,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-13 10:35:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:29,901 INFO L225 Difference]: With dead ends: 99 [2020-10-13 10:35:29,901 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 10:35:29,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:35:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 10:35:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-10-13 10:35:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:35:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-10-13 10:35:29,911 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 39 [2020-10-13 10:35:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:29,911 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-10-13 10:35:29,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:35:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-10-13 10:35:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:35:29,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:29,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:29,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:35:29,913 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:29,913 INFO L82 PathProgramCache]: Analyzing trace with hash -355771755, now seen corresponding path program 8 times [2020-10-13 10:35:29,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:29,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965843207] [2020-10-13 10:35:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:30,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:35:30,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:30,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-13 10:35:30,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:30,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:35:30,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:30,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:35:30,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:30,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:30,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:30,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:30,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:30,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965843207] [2020-10-13 10:35:30,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:30,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:35:30,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127393944] [2020-10-13 10:35:30,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:35:30,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:35:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:35:30,946 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 16 states. [2020-10-13 10:35:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:31,784 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2020-10-13 10:35:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:35:31,784 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-13 10:35:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:31,785 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:35:31,785 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 10:35:31,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:35:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 10:35:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2020-10-13 10:35:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 10:35:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-13 10:35:31,794 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 41 [2020-10-13 10:35:31,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:31,794 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-13 10:35:31,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:35:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-13 10:35:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:35:31,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:31,795 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:31,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:35:31,795 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:31,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1735103856, now seen corresponding path program 9 times [2020-10-13 10:35:31,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:31,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37287089] [2020-10-13 10:35:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:31,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:32,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:32,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:35:32,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:32,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-13 10:35:32,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:35:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:32,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:35:32,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:32,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:32,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:32,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:32,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:32,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:32,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:32,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37287089] [2020-10-13 10:35:32,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:32,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:35:32,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738728763] [2020-10-13 10:35:32,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:35:32,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:35:32,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:35:32,687 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 16 states. [2020-10-13 10:35:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:33,502 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2020-10-13 10:35:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:35:33,503 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-13 10:35:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:33,504 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:35:33,504 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 10:35:33,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:35:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 10:35:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-10-13 10:35:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:35:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-13 10:35:33,511 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 43 [2020-10-13 10:35:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:33,511 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-13 10:35:33,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:35:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-13 10:35:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:35:33,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:33,512 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:33,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:35:33,512 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:33,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1680042777, now seen corresponding path program 6 times [2020-10-13 10:35:33,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:33,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394436216] [2020-10-13 10:35:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:33,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:34,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:34,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:35:34,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:34,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-13 10:35:34,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:35:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:35:34,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:34,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:34,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:34,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:34,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:34,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:34,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:34,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:34,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:34,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:34,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:34,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:34,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394436216] [2020-10-13 10:35:34,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:34,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:35:34,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198398890] [2020-10-13 10:35:34,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:35:34,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:34,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:35:34,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:35:34,370 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 16 states. [2020-10-13 10:35:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:35,159 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-10-13 10:35:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:35:35,159 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-13 10:35:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:35,160 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:35:35,160 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:35:35,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:35:35,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:35:35,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-10-13 10:35:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:35:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-13 10:35:35,167 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 43 [2020-10-13 10:35:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:35,168 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-13 10:35:35,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:35:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-13 10:35:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:35:35,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:35,169 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:35,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:35:35,169 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1842647409, now seen corresponding path program 10 times [2020-10-13 10:35:35,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:35,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765651971] [2020-10-13 10:35:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:35,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:35,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:35,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:35:35,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:35,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-13 10:35:35,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:35,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:35:35,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:35,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:35:35,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:36,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:36,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:36,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:36,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:36,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:36,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:36,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:36,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:36,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:36,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:36,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765651971] [2020-10-13 10:35:36,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:36,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:35:36,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465786989] [2020-10-13 10:35:36,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:35:36,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:36,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:35:36,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:35:36,429 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 18 states. [2020-10-13 10:35:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:37,195 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-10-13 10:35:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:35:37,196 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-13 10:35:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:37,197 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:35:37,197 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 10:35:37,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:35:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 10:35:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 10:35:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:35:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-13 10:35:37,204 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 45 [2020-10-13 10:35:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:37,204 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-13 10:35:37,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:35:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-13 10:35:37,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:35:37,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:37,205 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:37,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:35:37,206 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash 849724616, now seen corresponding path program 7 times [2020-10-13 10:35:37,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:37,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923825043] [2020-10-13 10:35:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:37,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:37,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:37,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:35:37,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-13 10:35:37,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:35:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:35:37,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:38,459 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-13 10:35:38,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:38,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:38,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:38,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:38,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:38,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:38,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:38,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:38,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:38,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:38,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923825043] [2020-10-13 10:35:38,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:38,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:35:38,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228929317] [2020-10-13 10:35:38,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:35:38,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:38,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:35:38,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:35:38,679 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 18 states. [2020-10-13 10:35:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:39,531 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-10-13 10:35:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:35:39,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-13 10:35:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:39,532 INFO L225 Difference]: With dead ends: 85 [2020-10-13 10:35:39,532 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 10:35:39,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:35:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 10:35:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 10:35:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:35:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-13 10:35:39,540 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 45 [2020-10-13 10:35:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:39,540 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-13 10:35:39,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:35:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-13 10:35:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:35:39,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:39,541 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:39,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:35:39,541 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1223257366, now seen corresponding path program 11 times [2020-10-13 10:35:39,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:39,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371066967] [2020-10-13 10:35:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:39,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:40,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:40,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:35:40,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:40,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-13 10:35:40,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:40,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:35:40,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:40,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:35:40,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:40,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:40,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:40,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:40,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:40,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:40,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:40,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:40,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:40,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:40,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:40,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:40,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371066967] [2020-10-13 10:35:40,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:40,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:35:40,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753788356] [2020-10-13 10:35:40,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:35:40,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:35:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:35:40,859 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 19 states. [2020-10-13 10:35:41,840 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-13 10:35:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:42,292 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-13 10:35:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:35:42,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-13 10:35:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:42,293 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:35:42,293 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 10:35:42,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:35:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 10:35:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-13 10:35:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:35:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-10-13 10:35:42,301 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 47 [2020-10-13 10:35:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:42,302 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-10-13 10:35:42,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:35:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-10-13 10:35:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:35:42,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:42,305 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:42,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:35:42,305 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:42,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:42,305 INFO L82 PathProgramCache]: Analyzing trace with hash 590246147, now seen corresponding path program 8 times [2020-10-13 10:35:42,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:42,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230024404] [2020-10-13 10:35:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:42,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:42,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:42,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:35:42,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:42,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-13 10:35:42,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:42,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:35:42,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:42,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:35:42,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:43,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:43,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:43,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:43,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:43,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:43,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:43,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:43,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:43,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230024404] [2020-10-13 10:35:43,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:43,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:35:43,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026049075] [2020-10-13 10:35:43,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:35:43,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:43,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:35:43,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:35:43,621 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 19 states. [2020-10-13 10:35:44,650 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-13 10:35:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:45,086 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2020-10-13 10:35:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:35:45,087 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-13 10:35:45,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:45,088 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:35:45,088 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 10:35:45,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:35:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 10:35:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-10-13 10:35:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 10:35:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2020-10-13 10:35:45,098 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 47 [2020-10-13 10:35:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:45,099 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2020-10-13 10:35:45,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:35:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2020-10-13 10:35:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:35:45,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:45,100 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:45,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:35:45,100 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:45,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1305087109, now seen corresponding path program 12 times [2020-10-13 10:35:45,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:45,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130655013] [2020-10-13 10:35:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:45,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:45,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:45,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:35:45,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:45,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-13 10:35:45,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:35:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:35:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:46,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:46,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:46,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:46,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:46,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:46,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:46,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:46,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:46,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130655013] [2020-10-13 10:35:46,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:46,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:35:46,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721442320] [2020-10-13 10:35:46,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:35:46,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:46,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:35:46,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:35:46,596 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 19 states. [2020-10-13 10:35:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:47,758 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2020-10-13 10:35:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:35:47,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-13 10:35:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:47,760 INFO L225 Difference]: With dead ends: 129 [2020-10-13 10:35:47,760 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 10:35:47,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:35:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 10:35:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2020-10-13 10:35:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:35:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2020-10-13 10:35:47,770 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 49 [2020-10-13 10:35:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:47,771 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2020-10-13 10:35:47,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:35:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2020-10-13 10:35:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:35:47,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:47,771 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:47,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:35:47,772 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:47,772 INFO L82 PathProgramCache]: Analyzing trace with hash 92638048, now seen corresponding path program 13 times [2020-10-13 10:35:47,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:47,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263288262] [2020-10-13 10:35:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:47,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:48,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:48,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:35:48,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:48,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 637 [2020-10-13 10:35:48,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:49,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:49,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:49,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:49,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:49,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:49,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:49,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:49,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:49,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:49,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:49,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:49,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263288262] [2020-10-13 10:35:49,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:49,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:35:49,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935826751] [2020-10-13 10:35:49,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:35:49,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:49,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:35:49,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:35:49,286 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand 19 states. [2020-10-13 10:35:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:50,581 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-10-13 10:35:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:35:50,581 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-13 10:35:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:50,582 INFO L225 Difference]: With dead ends: 131 [2020-10-13 10:35:50,582 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 10:35:50,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:35:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 10:35:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2020-10-13 10:35:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:35:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2020-10-13 10:35:50,601 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 51 [2020-10-13 10:35:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:50,601 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2020-10-13 10:35:50,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:35:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2020-10-13 10:35:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:35:50,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:50,603 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:50,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:35:50,604 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:50,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:50,604 INFO L82 PathProgramCache]: Analyzing trace with hash -70315719, now seen corresponding path program 9 times [2020-10-13 10:35:50,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:50,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047664437] [2020-10-13 10:35:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:50,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:51,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:51,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:35:51,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:51,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-13 10:35:51,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:35:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:35:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:51,654 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-13 10:35:52,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:52,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:52,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:52,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:52,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:52,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:52,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:52,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:52,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047664437] [2020-10-13 10:35:52,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:52,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:35:52,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780302093] [2020-10-13 10:35:52,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:35:52,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:52,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:35:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:35:52,334 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 19 states. [2020-10-13 10:35:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:53,497 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2020-10-13 10:35:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:35:53,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-13 10:35:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:53,499 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:35:53,499 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 10:35:53,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:35:53,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 10:35:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-10-13 10:35:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 10:35:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-13 10:35:53,509 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 51 [2020-10-13 10:35:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:53,509 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-13 10:35:53,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:35:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-13 10:35:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:35:53,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:53,510 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:53,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:35:53,511 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:53,511 INFO L82 PathProgramCache]: Analyzing trace with hash -863406209, now seen corresponding path program 14 times [2020-10-13 10:35:53,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:53,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429907077] [2020-10-13 10:35:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:54,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:54,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:35:54,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:54,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-13 10:35:54,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:54,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:35:54,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:54,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:35:54,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:55,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:55,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:55,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:55,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:55,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:55,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:55,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:55,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:55,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:55,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:55,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:55,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429907077] [2020-10-13 10:35:55,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:55,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:35:55,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137885172] [2020-10-13 10:35:55,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:35:55,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:55,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:35:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:35:55,357 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 21 states. [2020-10-13 10:35:56,555 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-13 10:35:56,711 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-13 10:35:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:57,089 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2020-10-13 10:35:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:35:57,089 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-13 10:35:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:57,091 INFO L225 Difference]: With dead ends: 99 [2020-10-13 10:35:57,091 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 10:35:57,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:35:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 10:35:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-13 10:35:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 10:35:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-13 10:35:57,100 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 53 [2020-10-13 10:35:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:57,100 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-13 10:35:57,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:35:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-13 10:35:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:35:57,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:57,101 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:57,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:35:57,102 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash 52704026, now seen corresponding path program 10 times [2020-10-13 10:35:57,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:57,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384400921] [2020-10-13 10:35:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:57,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:57,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:57,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:35:57,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:57,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-13 10:35:57,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:57,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:35:57,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:57,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:35:57,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:58,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:58,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:58,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:58,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:58,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:58,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:58,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:58,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:58,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384400921] [2020-10-13 10:35:58,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:58,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:35:58,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269895773] [2020-10-13 10:35:58,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:35:58,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:35:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:35:58,696 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 21 states. [2020-10-13 10:36:00,011 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-13 10:36:00,175 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-10-13 10:36:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:00,570 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-10-13 10:36:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:36:00,571 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-13 10:36:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:00,571 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:36:00,571 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 10:36:00,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:36:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 10:36:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 10:36:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:36:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-13 10:36:00,579 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 53 [2020-10-13 10:36:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:00,580 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-13 10:36:00,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:36:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-13 10:36:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:36:00,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:00,581 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:00,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:36:00,581 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash -770301990, now seen corresponding path program 15 times [2020-10-13 10:36:00,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:00,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821694039] [2020-10-13 10:36:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:00,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:01,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:01,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:36:01,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:01,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-13 10:36:01,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:01,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:36:01,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:01,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:36:01,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:02,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:02,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:02,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:02,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:02,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:02,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:02,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:02,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:02,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:02,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:02,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:02,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821694039] [2020-10-13 10:36:02,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:02,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:36:02,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786975582] [2020-10-13 10:36:02,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:36:02,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:02,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:36:02,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:36:02,527 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 22 states. [2020-10-13 10:36:04,393 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-10-13 10:36:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:05,004 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-10-13 10:36:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:36:05,005 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-13 10:36:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:05,006 INFO L225 Difference]: With dead ends: 127 [2020-10-13 10:36:05,006 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 10:36:05,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:36:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 10:36:05,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2020-10-13 10:36:05,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:36:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-10-13 10:36:05,017 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 55 [2020-10-13 10:36:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:05,017 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-10-13 10:36:05,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:36:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-10-13 10:36:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:36:05,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:05,018 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:05,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:36:05,020 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash -842362155, now seen corresponding path program 11 times [2020-10-13 10:36:05,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:05,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359810179] [2020-10-13 10:36:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:05,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:05,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:05,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:36:05,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:05,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-13 10:36:05,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:36:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:05,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:36:05,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:06,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:06,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:06,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:06,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:06,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:06,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:06,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:06,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:06,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:06,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:06,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:06,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359810179] [2020-10-13 10:36:06,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:06,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:36:06,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461450711] [2020-10-13 10:36:06,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:36:06,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:06,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:36:06,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:36:06,598 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 22 states. [2020-10-13 10:36:08,656 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-13 10:36:09,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:09,298 INFO L93 Difference]: Finished difference Result 135 states and 141 transitions. [2020-10-13 10:36:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:36:09,298 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-13 10:36:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:09,299 INFO L225 Difference]: With dead ends: 135 [2020-10-13 10:36:09,300 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 10:36:09,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:36:09,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 10:36:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2020-10-13 10:36:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 10:36:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2020-10-13 10:36:09,308 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 55 [2020-10-13 10:36:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:09,308 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2020-10-13 10:36:09,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:36:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2020-10-13 10:36:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:36:09,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:09,309 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:09,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:36:09,309 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1491460747, now seen corresponding path program 16 times [2020-10-13 10:36:09,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:09,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949549020] [2020-10-13 10:36:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:09,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:10,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:10,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:36:10,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:10,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1073 [2020-10-13 10:36:10,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:36:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:36:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:11,139 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-13 10:36:11,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:11,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:11,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:11,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:11,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:11,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:11,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:11,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:11,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:11,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:11,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:11,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949549020] [2020-10-13 10:36:11,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:11,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:36:11,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003417664] [2020-10-13 10:36:11,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:36:11,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:11,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:36:11,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:36:11,693 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand 22 states. [2020-10-13 10:36:12,258 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-13 10:36:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:13,019 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2020-10-13 10:36:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:36:13,020 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-13 10:36:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:13,021 INFO L225 Difference]: With dead ends: 149 [2020-10-13 10:36:13,021 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 10:36:13,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:36:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 10:36:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2020-10-13 10:36:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 10:36:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2020-10-13 10:36:13,031 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 57 [2020-10-13 10:36:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:13,031 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2020-10-13 10:36:13,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:36:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2020-10-13 10:36:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:36:13,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:13,032 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:13,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:36:13,032 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1259675728, now seen corresponding path program 17 times [2020-10-13 10:36:13,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:13,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087871152] [2020-10-13 10:36:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:13,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:14,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:14,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:36:14,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:14,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1071 [2020-10-13 10:36:14,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:14,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:36:14,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:14,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:36:14,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:15,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:15,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:15,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:15,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:15,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:15,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:15,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:15,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087871152] [2020-10-13 10:36:15,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:15,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:36:15,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747888785] [2020-10-13 10:36:15,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:36:15,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:15,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:36:15,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:36:15,477 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand 22 states. [2020-10-13 10:36:16,465 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-13 10:36:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:17,241 INFO L93 Difference]: Finished difference Result 151 states and 157 transitions. [2020-10-13 10:36:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:36:17,241 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-13 10:36:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:17,242 INFO L225 Difference]: With dead ends: 151 [2020-10-13 10:36:17,243 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 10:36:17,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:36:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 10:36:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2020-10-13 10:36:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 10:36:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2020-10-13 10:36:17,252 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 59 [2020-10-13 10:36:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:17,252 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2020-10-13 10:36:17,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:36:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2020-10-13 10:36:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:36:17,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:17,253 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:17,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:36:17,254 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash -721290741, now seen corresponding path program 12 times [2020-10-13 10:36:17,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:17,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022902783] [2020-10-13 10:36:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:17,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:18,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:18,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:36:18,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:18,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-13 10:36:18,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:18,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:36:18,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:18,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:36:18,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:18,725 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 10:36:19,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:19,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:19,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:19,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:19,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:19,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:19,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:19,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:19,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:19,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022902783] [2020-10-13 10:36:19,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:19,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:36:19,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129195815] [2020-10-13 10:36:19,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:36:19,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:19,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:36:19,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:36:19,416 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand 22 states. [2020-10-13 10:36:20,093 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:36:20,449 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-13 10:36:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:21,068 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-10-13 10:36:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:36:21,072 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-13 10:36:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:21,073 INFO L225 Difference]: With dead ends: 137 [2020-10-13 10:36:21,073 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 10:36:21,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:36:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 10:36:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2020-10-13 10:36:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:36:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-13 10:36:21,080 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 59 [2020-10-13 10:36:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:21,081 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-13 10:36:21,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:36:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-13 10:36:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:36:21,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:21,081 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:21,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:36:21,082 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:21,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1808162961, now seen corresponding path program 18 times [2020-10-13 10:36:21,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:21,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122835557] [2020-10-13 10:36:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:21,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:22,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:22,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:36:22,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:22,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-13 10:36:22,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:22,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:36:22,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:22,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:36:22,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:22,730 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-13 10:36:23,092 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-13 10:36:23,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:23,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:23,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:23,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:23,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:23,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:23,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:23,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:23,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:23,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:23,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:23,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122835557] [2020-10-13 10:36:23,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:23,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:36:23,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190705473] [2020-10-13 10:36:23,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:36:23,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:23,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:36:23,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:36:23,593 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 24 states. [2020-10-13 10:36:24,655 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-13 10:36:24,848 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-10-13 10:36:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:25,279 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-10-13 10:36:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:36:25,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 61 [2020-10-13 10:36:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:25,281 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:36:25,281 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 10:36:25,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:36:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 10:36:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-13 10:36:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:36:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-13 10:36:25,289 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 61 [2020-10-13 10:36:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:25,290 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-13 10:36:25,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:36:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-13 10:36:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:36:25,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:25,291 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:25,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:36:25,291 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash 386158060, now seen corresponding path program 13 times [2020-10-13 10:36:25,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:25,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190060793] [2020-10-13 10:36:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:25,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:26,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:26,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:36:26,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:26,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-13 10:36:26,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:26,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:36:26,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:26,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:36:26,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:26,959 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-13 10:36:27,230 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-13 10:36:27,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:27,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:27,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:27,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:27,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:27,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:27,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:27,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:27,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190060793] [2020-10-13 10:36:27,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:27,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:36:27,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480948042] [2020-10-13 10:36:27,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:36:27,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:27,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:36:27,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:36:27,719 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 24 states. [2020-10-13 10:36:28,975 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2020-10-13 10:36:29,167 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-13 10:36:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:29,622 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2020-10-13 10:36:29,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:36:29,623 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 61 [2020-10-13 10:36:29,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:29,624 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:36:29,624 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 10:36:29,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:36:29,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 10:36:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-13 10:36:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 10:36:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-10-13 10:36:29,633 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 61 [2020-10-13 10:36:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:29,633 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-10-13 10:36:29,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:36:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-10-13 10:36:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:36:29,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:29,634 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:29,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:36:29,634 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:29,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1851526090, now seen corresponding path program 19 times [2020-10-13 10:36:29,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:29,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054494797] [2020-10-13 10:36:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:29,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:30,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:30,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:36:30,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:30,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 857 [2020-10-13 10:36:30,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:36:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:36:30,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:31,027 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-13 10:36:31,294 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-13 10:36:31,464 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-10-13 10:36:31,643 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-13 10:36:31,823 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-13 10:36:32,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:32,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:32,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:32,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:32,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:32,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:32,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:32,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054494797] [2020-10-13 10:36:32,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:32,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:36:32,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025214262] [2020-10-13 10:36:32,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:36:32,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:32,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:36:32,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:36:32,362 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 25 states. [2020-10-13 10:36:33,677 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-13 10:36:34,298 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:36:34,474 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:36:34,650 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:36:34,823 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:36:35,110 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 92 [2020-10-13 10:36:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:35,854 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2020-10-13 10:36:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:36:35,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-13 10:36:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:35,856 INFO L225 Difference]: With dead ends: 145 [2020-10-13 10:36:35,856 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 10:36:35,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=236, Invalid=2626, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:36:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 10:36:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2020-10-13 10:36:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 10:36:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2020-10-13 10:36:35,869 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 63 [2020-10-13 10:36:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:35,869 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2020-10-13 10:36:35,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:36:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2020-10-13 10:36:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:36:35,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:35,870 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:35,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:36:35,871 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1779384615, now seen corresponding path program 14 times [2020-10-13 10:36:35,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:35,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364364374] [2020-10-13 10:36:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:35,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:37,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:37,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:36:37,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:37,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-13 10:36:37,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:37,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:36:37,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:37,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:36:37,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:38,452 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-13 10:36:38,719 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-13 10:36:38,874 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-13 10:36:39,045 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-13 10:36:39,246 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-13 10:36:39,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:39,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:39,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:39,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:39,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:39,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:39,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:39,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:39,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:39,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:39,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:39,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364364374] [2020-10-13 10:36:39,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:39,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:36:39,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240135206] [2020-10-13 10:36:39,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:36:39,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:39,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:36:39,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:36:39,792 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand 25 states. [2020-10-13 10:36:41,244 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:36:41,409 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:36:41,923 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:36:42,125 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:36:42,321 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:36:42,538 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 10:36:42,795 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 88 [2020-10-13 10:36:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:43,592 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2020-10-13 10:36:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:36:43,592 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-13 10:36:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:43,594 INFO L225 Difference]: With dead ends: 153 [2020-10-13 10:36:43,594 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 10:36:43,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=236, Invalid=2626, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:36:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 10:36:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2020-10-13 10:36:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 10:36:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 139 transitions. [2020-10-13 10:36:43,607 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 139 transitions. Word has length 63 [2020-10-13 10:36:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:43,607 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 139 transitions. [2020-10-13 10:36:43,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:36:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 139 transitions. [2020-10-13 10:36:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:36:43,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:43,608 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:43,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:36:43,608 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:43,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1234488677, now seen corresponding path program 20 times [2020-10-13 10:36:43,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:43,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877667305] [2020-10-13 10:36:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:43,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:44,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:44,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:36:44,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:44,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-13 10:36:44,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:36:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:36:44,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:45,287 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-13 10:36:45,583 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-13 10:36:45,877 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-13 10:36:46,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:46,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:46,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:46,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:46,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:46,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:46,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:46,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:46,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:46,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:46,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877667305] [2020-10-13 10:36:46,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:46,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:36:46,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744706618] [2020-10-13 10:36:46,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:36:46,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:46,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:36:46,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:36:46,511 INFO L87 Difference]: Start difference. First operand 133 states and 139 transitions. Second operand 25 states. [2020-10-13 10:36:47,777 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-13 10:36:48,209 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-13 10:36:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:49,293 INFO L93 Difference]: Finished difference Result 169 states and 176 transitions. [2020-10-13 10:36:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:36:49,294 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-10-13 10:36:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:49,295 INFO L225 Difference]: With dead ends: 169 [2020-10-13 10:36:49,295 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 10:36:49,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:36:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 10:36:49,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 137. [2020-10-13 10:36:49,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 10:36:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2020-10-13 10:36:49,309 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 65 [2020-10-13 10:36:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:49,310 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2020-10-13 10:36:49,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:36:49,310 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2020-10-13 10:36:49,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:36:49,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:49,311 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:49,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:36:49,311 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash 967021632, now seen corresponding path program 21 times [2020-10-13 10:36:49,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:49,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964915654] [2020-10-13 10:36:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:49,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:50,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:50,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:36:50,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:50,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1285 [2020-10-13 10:36:50,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:50,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:36:50,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:50,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:36:50,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:50,979 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-13 10:36:51,254 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-13 10:36:51,471 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-13 10:36:51,650 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-13 10:36:51,824 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-13 10:36:52,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:52,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:52,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:52,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:52,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:52,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:52,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:52,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:52,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:52,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:52,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:52,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964915654] [2020-10-13 10:36:52,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:52,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:36:52,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173295618] [2020-10-13 10:36:52,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:36:52,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:36:52,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:36:52,422 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand 25 states. [2020-10-13 10:36:52,999 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-13 10:36:53,367 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:36:53,544 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:36:53,824 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-13 10:36:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:54,825 INFO L93 Difference]: Finished difference Result 171 states and 177 transitions. [2020-10-13 10:36:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:36:54,825 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-10-13 10:36:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:54,827 INFO L225 Difference]: With dead ends: 171 [2020-10-13 10:36:54,827 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 10:36:54,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:36:54,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 10:36:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 131. [2020-10-13 10:36:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 10:36:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2020-10-13 10:36:54,840 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 67 [2020-10-13 10:36:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:54,840 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2020-10-13 10:36:54,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:36:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2020-10-13 10:36:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:36:54,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:54,841 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:54,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:36:54,842 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1203973981, now seen corresponding path program 15 times [2020-10-13 10:36:54,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:54,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625265510] [2020-10-13 10:36:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:54,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:55,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:55,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:36:55,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:55,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-13 10:36:55,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:36:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:36:55,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:56,568 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-13 10:36:56,716 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-13 10:36:56,874 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-13 10:36:57,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:57,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:57,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:57,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:57,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:57,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:57,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:57,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:57,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625265510] [2020-10-13 10:36:57,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:57,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:36:57,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607229707] [2020-10-13 10:36:57,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:36:57,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:36:57,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:36:57,496 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 25 states. [2020-10-13 10:36:58,077 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-13 10:36:58,444 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:36:58,621 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:36:58,904 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-13 10:36:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:59,742 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2020-10-13 10:36:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:36:59,743 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-10-13 10:36:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:59,744 INFO L225 Difference]: With dead ends: 155 [2020-10-13 10:36:59,744 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 10:36:59,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:36:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 10:36:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2020-10-13 10:36:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 10:36:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2020-10-13 10:36:59,754 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 67 [2020-10-13 10:36:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:59,754 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2020-10-13 10:36:59,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:36:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2020-10-13 10:36:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:36:59,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:59,755 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:59,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:36:59,756 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1671092641, now seen corresponding path program 22 times [2020-10-13 10:36:59,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:59,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858710654] [2020-10-13 10:36:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:59,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:01,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:01,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:37:01,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:01,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-10-13 10:37:01,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:37:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:37:01,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:01,977 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-13 10:37:02,237 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-13 10:37:02,444 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 10:37:02,677 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-13 10:37:02,897 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-10-13 10:37:03,057 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-13 10:37:03,276 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-13 10:37:03,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:03,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:03,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:03,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:03,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:03,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:03,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:03,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:03,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:03,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:03,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858710654] [2020-10-13 10:37:03,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:03,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:37:03,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244553021] [2020-10-13 10:37:03,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:37:03,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:03,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:37:03,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:37:03,870 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 27 states. [2020-10-13 10:37:04,657 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-13 10:37:04,802 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-13 10:37:05,297 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:37:05,471 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-13 10:37:06,045 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 10:37:06,221 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-13 10:37:06,415 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:37:06,591 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:37:06,910 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 101 [2020-10-13 10:37:07,236 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 101 [2020-10-13 10:37:07,554 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 103 [2020-10-13 10:37:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:08,305 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2020-10-13 10:37:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:37:08,306 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2020-10-13 10:37:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:08,307 INFO L225 Difference]: With dead ends: 131 [2020-10-13 10:37:08,307 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 10:37:08,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=235, Invalid=2627, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:37:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 10:37:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-13 10:37:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 10:37:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-10-13 10:37:08,318 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 69 [2020-10-13 10:37:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:08,319 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-10-13 10:37:08,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:37:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-10-13 10:37:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:37:08,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:08,320 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:08,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:37:08,320 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:08,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:08,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1182534338, now seen corresponding path program 16 times [2020-10-13 10:37:08,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:08,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14318837] [2020-10-13 10:37:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:08,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:09,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:09,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:37:09,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:09,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-13 10:37:09,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:09,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:37:09,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:09,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:37:09,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:10,138 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-13 10:37:10,347 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-13 10:37:10,604 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-13 10:37:10,870 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-13 10:37:11,148 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-13 10:37:11,557 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-10-13 10:37:11,736 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-13 10:37:11,986 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-13 10:37:12,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:12,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:12,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:12,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:12,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:12,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:12,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:12,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:12,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:12,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:12,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:12,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14318837] [2020-10-13 10:37:12,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:12,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:37:12,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125884330] [2020-10-13 10:37:12,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:37:12,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:12,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:37:12,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:37:12,600 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 27 states. [2020-10-13 10:37:13,514 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-13 10:37:13,686 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-13 10:37:14,218 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-13 10:37:14,412 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-13 10:37:15,001 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-13 10:37:15,209 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-13 10:37:15,417 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 10:37:15,648 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 10:37:15,980 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 102 [2020-10-13 10:37:16,321 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 99 [2020-10-13 10:37:16,614 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 102 [2020-10-13 10:37:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:17,364 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2020-10-13 10:37:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:37:17,365 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2020-10-13 10:37:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:17,367 INFO L225 Difference]: With dead ends: 133 [2020-10-13 10:37:17,367 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 10:37:17,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=235, Invalid=2627, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:37:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 10:37:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-13 10:37:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 10:37:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-10-13 10:37:17,380 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 69 [2020-10-13 10:37:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:17,380 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-10-13 10:37:17,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:37:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-10-13 10:37:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:37:17,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:17,381 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:17,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:37:17,381 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash 432117434, now seen corresponding path program 23 times [2020-10-13 10:37:17,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:17,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847691378] [2020-10-13 10:37:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:17,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:18,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:18,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:37:18,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:18,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1395 [2020-10-13 10:37:18,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:37:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:37:18,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:19,221 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-13 10:37:19,617 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 10:37:19,926 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-13 10:37:20,279 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2020-10-13 10:37:20,437 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:37:20,634 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-13 10:37:20,827 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-13 10:37:21,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:21,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:21,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:21,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:21,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:21,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:21,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:21,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:21,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:21,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:21,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:21,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847691378] [2020-10-13 10:37:21,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:21,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:37:21,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193628941] [2020-10-13 10:37:21,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:37:21,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:37:21,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:37:21,531 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 28 states. [2020-10-13 10:37:22,750 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-13 10:37:22,919 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:37:23,436 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:37:23,619 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:37:23,959 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-13 10:37:24,195 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-13 10:37:24,382 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:37:24,571 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:37:24,758 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-13 10:37:25,099 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 108 [2020-10-13 10:37:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:26,046 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2020-10-13 10:37:26,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:37:26,047 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-10-13 10:37:26,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:26,048 INFO L225 Difference]: With dead ends: 163 [2020-10-13 10:37:26,048 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 10:37:26,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:37:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 10:37:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 139. [2020-10-13 10:37:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 10:37:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2020-10-13 10:37:26,061 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 71 [2020-10-13 10:37:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:26,061 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2020-10-13 10:37:26,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:37:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2020-10-13 10:37:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:37:26,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:26,062 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:26,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:37:26,063 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:26,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:26,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1799511033, now seen corresponding path program 17 times [2020-10-13 10:37:26,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:26,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52375231] [2020-10-13 10:37:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:26,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:27,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:27,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:37:27,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:27,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1580 [2020-10-13 10:37:27,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:37:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:27,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:37:27,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:28,385 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-13 10:37:28,693 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-13 10:37:28,860 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-13 10:37:29,123 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-13 10:37:29,293 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-13 10:37:29,619 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-13 10:37:29,870 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-10-13 10:37:30,142 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-13 10:37:30,489 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2020-10-13 10:37:31,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:31,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:31,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:31,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:31,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:31,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:31,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:31,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52375231] [2020-10-13 10:37:31,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:31,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:37:31,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446848115] [2020-10-13 10:37:31,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:37:31,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:37:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:37:31,316 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand 28 states. [2020-10-13 10:37:32,859 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:37:33,394 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:37:33,602 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:37:34,002 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:37:34,203 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:37:34,420 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:37:34,615 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:37:34,837 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-13 10:37:35,178 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2020-10-13 10:37:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:36,121 INFO L93 Difference]: Finished difference Result 171 states and 177 transitions. [2020-10-13 10:37:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:37:36,121 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-10-13 10:37:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:36,123 INFO L225 Difference]: With dead ends: 171 [2020-10-13 10:37:36,123 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 10:37:36,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:37:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 10:37:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 149. [2020-10-13 10:37:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 10:37:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2020-10-13 10:37:36,138 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 71 [2020-10-13 10:37:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:36,139 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2020-10-13 10:37:36,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:37:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2020-10-13 10:37:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:37:36,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:36,140 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:36,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:37:36,140 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1312596907, now seen corresponding path program 24 times [2020-10-13 10:37:36,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:36,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884380247] [2020-10-13 10:37:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:36,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:37,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:37,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:37:37,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:37,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1630 [2020-10-13 10:37:37,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:37:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:37:37,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:38,592 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-13 10:37:38,943 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-13 10:37:39,098 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-13 10:37:39,324 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-13 10:37:39,476 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-13 10:37:39,669 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-13 10:37:40,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:40,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:40,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:40,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:40,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:40,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:40,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:40,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:40,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884380247] [2020-10-13 10:37:40,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:40,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:37:40,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433825790] [2020-10-13 10:37:40,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:37:40,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:40,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:37:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:37:40,439 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 28 states. [2020-10-13 10:37:41,453 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 86 [2020-10-13 10:37:41,652 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:37:41,986 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2020-10-13 10:37:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:43,304 INFO L93 Difference]: Finished difference Result 189 states and 196 transitions. [2020-10-13 10:37:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:37:43,305 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2020-10-13 10:37:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:43,307 INFO L225 Difference]: With dead ends: 189 [2020-10-13 10:37:43,307 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 10:37:43,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=127, Invalid=1513, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:37:43,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 10:37:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 153. [2020-10-13 10:37:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 10:37:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 159 transitions. [2020-10-13 10:37:43,321 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 159 transitions. Word has length 73 [2020-10-13 10:37:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:43,321 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 159 transitions. [2020-10-13 10:37:43,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:37:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 159 transitions. [2020-10-13 10:37:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:37:43,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:43,322 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:43,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:37:43,322 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:43,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1349134128, now seen corresponding path program 25 times [2020-10-13 10:37:43,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:43,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863169327] [2020-10-13 10:37:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:43,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:44,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:44,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:37:44,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:44,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-10-13 10:37:44,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:44,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:37:44,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:44,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:37:44,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:45,168 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-13 10:37:45,409 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-13 10:37:45,718 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 10:37:46,056 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-13 10:37:46,225 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-13 10:37:46,438 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-13 10:37:47,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:47,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:47,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:47,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:47,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:47,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863169327] [2020-10-13 10:37:47,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:47,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:37:47,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560509476] [2020-10-13 10:37:47,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:37:47,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:37:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:37:47,217 INFO L87 Difference]: Start difference. First operand 153 states and 159 transitions. Second operand 28 states. [2020-10-13 10:37:48,262 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 87 [2020-10-13 10:37:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:49,509 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2020-10-13 10:37:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:37:49,510 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-10-13 10:37:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:49,511 INFO L225 Difference]: With dead ends: 191 [2020-10-13 10:37:49,511 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 10:37:49,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:37:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 10:37:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 147. [2020-10-13 10:37:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 10:37:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 152 transitions. [2020-10-13 10:37:49,527 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 152 transitions. Word has length 75 [2020-10-13 10:37:49,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:49,527 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 152 transitions. [2020-10-13 10:37:49,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:37:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 152 transitions. [2020-10-13 10:37:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:37:49,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:49,528 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:49,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:37:49,529 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash -244805329, now seen corresponding path program 18 times [2020-10-13 10:37:49,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:49,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100022260] [2020-10-13 10:37:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:49,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:50,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:50,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:37:50,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:50,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1330 [2020-10-13 10:37:50,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:50,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:37:50,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:50,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:37:50,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:51,450 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-13 10:37:51,680 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 10:37:51,920 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 10:37:52,058 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-13 10:37:52,269 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-10-13 10:37:52,426 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-13 10:37:52,579 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-13 10:37:53,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:53,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:53,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:53,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:53,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:53,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:53,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:53,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100022260] [2020-10-13 10:37:53,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:53,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:37:53,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646729694] [2020-10-13 10:37:53,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:37:53,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:53,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:37:53,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:37:53,352 INFO L87 Difference]: Start difference. First operand 147 states and 152 transitions. Second operand 28 states. [2020-10-13 10:37:54,408 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 87 [2020-10-13 10:37:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:55,387 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2020-10-13 10:37:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:37:55,388 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-10-13 10:37:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:55,390 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:37:55,390 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 10:37:55,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:37:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 10:37:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2020-10-13 10:37:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:37:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2020-10-13 10:37:55,405 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 75 [2020-10-13 10:37:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:55,405 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2020-10-13 10:37:55,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:37:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2020-10-13 10:37:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 10:37:55,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:55,406 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:55,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:37:55,407 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:55,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1843743823, now seen corresponding path program 26 times [2020-10-13 10:37:55,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:55,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653731603] [2020-10-13 10:37:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:55,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:57,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:57,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:37:57,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:57,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2062 [2020-10-13 10:37:57,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:57,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:37:57,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:57,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:37:57,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:58,030 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-13 10:37:58,291 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-13 10:37:58,510 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-13 10:37:58,860 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-13 10:37:59,091 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-10-13 10:37:59,334 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2020-10-13 10:37:59,660 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 94 [2020-10-13 10:38:00,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:00,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:00,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:00,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:00,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:00,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:00,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:00,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:00,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:00,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:00,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:38:00,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653731603] [2020-10-13 10:38:00,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:00,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:38:00,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134967420] [2020-10-13 10:38:00,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:38:00,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:00,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:38:00,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:38:00,710 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand 30 states. [2020-10-13 10:38:02,016 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-13 10:38:02,166 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:38:02,694 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:38:02,874 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:38:03,503 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-13 10:38:03,735 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:38:03,971 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-13 10:38:04,208 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-13 10:38:04,529 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-13 10:38:04,875 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 110 [2020-10-13 10:38:05,217 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 113 [2020-10-13 10:38:06,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:06,012 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2020-10-13 10:38:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:38:06,013 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 77 [2020-10-13 10:38:06,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:06,014 INFO L225 Difference]: With dead ends: 147 [2020-10-13 10:38:06,015 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 10:38:06,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=275, Invalid=3507, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:38:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 10:38:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-13 10:38:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 10:38:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2020-10-13 10:38:06,029 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 77 [2020-10-13 10:38:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:06,029 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2020-10-13 10:38:06,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:38:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2020-10-13 10:38:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 10:38:06,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:06,031 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:06,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:38:06,031 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:06,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1994983696, now seen corresponding path program 19 times [2020-10-13 10:38:06,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:06,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392416388] [2020-10-13 10:38:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:06,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:08,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:08,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:38:08,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:08,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-13 10:38:08,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:08,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:38:08,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:08,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:38:08,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:08,734 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-13 10:38:09,171 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-13 10:38:09,477 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-13 10:38:09,724 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-10-13 10:38:09,986 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2020-10-13 10:38:10,305 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 95 [2020-10-13 10:38:11,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:11,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:11,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:11,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:11,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:11,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:38:11,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:11,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:38:11,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392416388] [2020-10-13 10:38:11,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:11,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:38:11,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432366006] [2020-10-13 10:38:11,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:38:11,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:11,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:38:11,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:38:11,336 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 30 states. [2020-10-13 10:38:12,813 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:38:13,003 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:38:13,593 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:38:13,807 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:38:14,227 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:38:14,477 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:38:14,741 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 10:38:15,000 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-13 10:38:15,278 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-13 10:38:15,584 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-13 10:38:15,955 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-10-13 10:38:16,290 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 114 [2020-10-13 10:38:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:17,098 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2020-10-13 10:38:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:38:17,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 77 [2020-10-13 10:38:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:17,100 INFO L225 Difference]: With dead ends: 149 [2020-10-13 10:38:17,100 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 10:38:17,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=275, Invalid=3507, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:38:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 10:38:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-13 10:38:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 10:38:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2020-10-13 10:38:17,112 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 77 [2020-10-13 10:38:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:17,112 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2020-10-13 10:38:17,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:38:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2020-10-13 10:38:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 10:38:17,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:17,113 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:17,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:38:17,113 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1949302614, now seen corresponding path program 27 times [2020-10-13 10:38:17,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:17,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333858939] [2020-10-13 10:38:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:17,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:19,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:19,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 10:38:19,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:19,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1978 [2020-10-13 10:38:19,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:19,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:38:19,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:19,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:38:19,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:19,817 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 10:38:20,054 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-13 10:38:20,190 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 10:38:20,459 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-10-13 10:38:20,611 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-13 10:38:20,904 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 93 [2020-10-13 10:38:21,111 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-13 10:38:21,331 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-13 10:38:21,580 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 10:38:22,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:22,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:22,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:22,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:22,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:22,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:22,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:22,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:22,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:38:22,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333858939] [2020-10-13 10:38:22,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:22,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:38:22,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063679906] [2020-10-13 10:38:22,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:38:22,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:22,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:38:22,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:38:22,572 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand 31 states. [2020-10-13 10:38:24,204 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-13 10:38:24,363 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:38:24,929 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:38:25,118 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:38:25,490 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-13 10:38:25,786 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-13 10:38:26,017 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:38:26,251 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:38:26,456 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-13 10:38:26,815 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-13 10:38:27,099 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-13 10:38:27,350 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-13 10:38:27,586 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-13 10:38:28,028 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 122 [2020-10-13 10:38:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:29,241 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2020-10-13 10:38:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:38:29,242 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 79 [2020-10-13 10:38:29,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:29,244 INFO L225 Difference]: With dead ends: 181 [2020-10-13 10:38:29,244 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 10:38:29,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=312, Invalid=4518, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 10:38:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 10:38:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 155. [2020-10-13 10:38:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 10:38:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2020-10-13 10:38:29,258 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 79 [2020-10-13 10:38:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:29,258 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2020-10-13 10:38:29,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:38:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2020-10-13 10:38:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 10:38:29,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:29,259 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:29,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:38:29,260 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:29,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1672594251, now seen corresponding path program 20 times [2020-10-13 10:38:29,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:29,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230217747] [2020-10-13 10:38:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:29,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:31,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:31,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 10:38:31,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:31,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2495 [2020-10-13 10:38:31,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:38:31,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:38:31,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:32,521 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-13 10:38:32,759 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 10:38:32,893 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 10:38:33,134 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-10-13 10:38:33,293 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-13 10:38:33,719 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2020-10-13 10:38:33,923 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-13 10:38:34,143 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-13 10:38:34,400 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 10:38:35,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:35,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:35,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:35,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:35,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:35,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:35,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:35,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:38:35,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230217747] [2020-10-13 10:38:35,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:35,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:38:35,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299858568] [2020-10-13 10:38:35,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:38:35,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:38:35,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:38:35,381 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand 31 states. [2020-10-13 10:38:37,174 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 10:38:37,351 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-13 10:38:37,943 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:38:38,163 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:38:38,590 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 10:38:38,842 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:38:39,107 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 10:38:39,345 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-13 10:38:39,605 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-13 10:38:39,928 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-13 10:38:40,264 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-13 10:38:40,532 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-13 10:38:40,820 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-13 10:38:41,265 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 123 [2020-10-13 10:38:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:42,472 INFO L93 Difference]: Finished difference Result 189 states and 195 transitions. [2020-10-13 10:38:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:38:42,472 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 79 [2020-10-13 10:38:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:42,475 INFO L225 Difference]: With dead ends: 189 [2020-10-13 10:38:42,475 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 10:38:42,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=312, Invalid=4518, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 10:38:42,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 10:38:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 165. [2020-10-13 10:38:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-13 10:38:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 171 transitions. [2020-10-13 10:38:42,491 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 171 transitions. Word has length 79 [2020-10-13 10:38:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:42,491 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 171 transitions. [2020-10-13 10:38:42,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:38:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 171 transitions. [2020-10-13 10:38:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 10:38:42,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:42,492 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:42,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:38:42,492 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:42,492 INFO L82 PathProgramCache]: Analyzing trace with hash -639694267, now seen corresponding path program 28 times [2020-10-13 10:38:42,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:42,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496532764] [2020-10-13 10:38:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:42,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:45,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:45,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 10:38:45,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:45,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2434 [2020-10-13 10:38:45,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:45,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:38:45,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:45,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 10:38:45,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:46,071 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-13 10:38:46,426 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-13 10:38:46,579 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-13 10:38:46,860 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-13 10:38:47,038 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-13 10:38:47,385 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2020-10-13 10:38:47,608 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-10-13 10:38:47,832 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-13 10:38:48,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:48,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:48,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:48,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:48,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:48,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:48,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:38:49,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496532764] [2020-10-13 10:38:49,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:49,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:38:49,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445331975] [2020-10-13 10:38:49,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:38:49,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:49,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:38:49,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=868, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:38:49,062 INFO L87 Difference]: Start difference. First operand 165 states and 171 transitions. Second operand 31 states. [2020-10-13 10:38:50,452 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-13 10:38:50,958 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2020-10-13 10:38:51,566 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 85 [2020-10-13 10:38:52,259 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 97 [2020-10-13 10:38:52,561 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-13 10:38:53,042 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 109 [2020-10-13 10:38:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:55,248 INFO L93 Difference]: Finished difference Result 209 states and 216 transitions. [2020-10-13 10:38:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:38:55,248 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2020-10-13 10:38:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:55,250 INFO L225 Difference]: With dead ends: 209 [2020-10-13 10:38:55,250 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 10:38:55,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:38:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 10:38:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 169. [2020-10-13 10:38:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 10:38:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 175 transitions. [2020-10-13 10:38:55,266 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 175 transitions. Word has length 81 [2020-10-13 10:38:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:55,266 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 175 transitions. [2020-10-13 10:38:55,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:38:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 175 transitions. [2020-10-13 10:38:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 10:38:55,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:55,267 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:55,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:38:55,267 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash -531490528, now seen corresponding path program 29 times [2020-10-13 10:38:55,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:55,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189741966] [2020-10-13 10:38:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:55,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:58,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:58,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 10:38:58,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3568 [2020-10-13 10:38:58,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:38:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 10:38:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:59,575 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-13 10:38:59,805 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-13 10:39:00,111 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-13 10:39:00,279 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-13 10:39:00,596 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93