/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:30:22,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:30:22,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:30:22,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:30:22,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:30:22,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:30:22,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:30:22,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:30:22,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:30:22,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:30:22,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:30:22,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:30:22,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:30:22,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:30:22,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:30:22,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:30:22,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:30:22,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:30:22,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:30:22,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:30:22,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:30:22,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:30:22,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:30:22,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:30:22,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:30:22,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:30:22,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:30:22,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:30:22,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:30:22,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:30:22,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:30:22,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:30:22,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:30:22,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:30:22,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:30:22,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:30:22,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:30:22,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:30:22,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:30:22,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:30:22,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:30:22,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 23:30:22,196 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:30:22,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:30:22,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:30:22,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:30:22,199 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:30:22,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:30:22,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:30:22,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:30:22,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:30:22,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:30:22,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:30:22,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:30:22,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:30:22,200 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:30:22,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:30:22,201 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:30:22,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:30:22,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:30:22,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:30:22,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:30:22,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:30:22,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:30:22,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:30:22,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:30:22,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:30:22,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:30:22,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:30:22,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:30:22,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:30:22,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:30:22,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:30:22,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:30:22,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:30:22,560 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:30:22,561 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:30:22,562 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-14 23:30:22,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da21f3bde/2d52e76e78484b35970d27a15168ecd3/FLAGcf37b4a0e [2020-10-14 23:30:23,156 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:30:23,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-14 23:30:23,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da21f3bde/2d52e76e78484b35970d27a15168ecd3/FLAGcf37b4a0e [2020-10-14 23:30:23,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da21f3bde/2d52e76e78484b35970d27a15168ecd3 [2020-10-14 23:30:23,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:30:23,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:30:23,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:30:23,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:30:23,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:30:23,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:30:23" (1/1) ... [2020-10-14 23:30:23,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a47163c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:23, skipping insertion in model container [2020-10-14 23:30:23,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:30:23" (1/1) ... [2020-10-14 23:30:23,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:30:23,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:30:23,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:30:24,011 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:30:24,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:30:24,171 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:30:24,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24 WrapperNode [2020-10-14 23:30:24,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:30:24,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:30:24,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:30:24,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:30:24,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24" (1/1) ... [2020-10-14 23:30:24,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24" (1/1) ... [2020-10-14 23:30:24,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24" (1/1) ... [2020-10-14 23:30:24,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24" (1/1) ... [2020-10-14 23:30:24,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24" (1/1) ... [2020-10-14 23:30:24,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24" (1/1) ... [2020-10-14 23:30:24,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24" (1/1) ... [2020-10-14 23:30:24,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:30:24,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:30:24,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:30:24,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:30:24,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:30:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:30:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:30:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 23:30:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 23:30:24,321 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 23:30:24,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:30:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:30:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:30:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:30:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:30:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:30:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:30:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:30:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:30:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:30:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:30:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:30:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:30:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:30:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:30:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:30:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:30:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:30:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:30:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 23:30:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 23:30:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:30:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:30:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:30:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:30:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:30:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:30:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:30:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:30:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:30:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:30:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:30:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:30:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:30:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:30:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:30:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:30:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:30:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:30:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:30:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:30:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:30:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:30:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:30:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:30:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:30:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:30:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:30:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:30:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:30:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:30:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:30:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:30:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:30:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:30:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:30:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:30:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:30:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:30:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 23:30:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:30:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:30:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:30:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:30:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:30:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:30:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:30:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:30:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:30:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:30:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:30:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:30:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:30:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:30:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:30:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:30:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:30:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:30:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:30:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:30:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:30:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:30:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:30:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:30:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:30:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:30:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:30:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:30:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:30:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:30:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:30:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:30:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:30:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:30:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:30:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:30:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:30:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:30:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:30:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:30:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:30:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:30:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:30:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:30:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:30:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:30:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:30:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:30:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 23:30:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:30:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:30:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:30:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:30:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:30:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:30:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:30:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:30:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:30:24,655 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 23:30:25,018 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:30:25,019 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-14 23:30:25,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:30:25 BoogieIcfgContainer [2020-10-14 23:30:25,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:30:25,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:30:25,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:30:25,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:30:25,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:30:23" (1/3) ... [2020-10-14 23:30:25,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d33b473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:30:25, skipping insertion in model container [2020-10-14 23:30:25,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:24" (2/3) ... [2020-10-14 23:30:25,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d33b473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:30:25, skipping insertion in model container [2020-10-14 23:30:25,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:30:25" (3/3) ... [2020-10-14 23:30:25,037 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2020-10-14 23:30:25,048 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:30:25,056 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:30:25,071 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:30:25,098 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:30:25,099 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:30:25,099 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:30:25,099 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:30:25,099 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:30:25,100 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:30:25,100 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:30:25,100 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:30:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-14 23:30:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:30:25,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:25,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:25,131 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-10-14 23:30:25,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:25,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294628627] [2020-10-14 23:30:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:25,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:25,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:25,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:25,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:25,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:25,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:25,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:25,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:25,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:30:25,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:30:25,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-14 23:30:25,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:25,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:30:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:30:25,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:30:25,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 23:30:25,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:25,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:25,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:25,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:25,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:25,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:30:25,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:25,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:25,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:25,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294628627] [2020-10-14 23:30:25,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:30:25,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:30:25,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870974216] [2020-10-14 23:30:25,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:30:25,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:25,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:30:25,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:30:25,823 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 6 states. [2020-10-14 23:30:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:26,142 INFO L93 Difference]: Finished difference Result 139 states and 213 transitions. [2020-10-14 23:30:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:30:26,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 23:30:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:26,155 INFO L225 Difference]: With dead ends: 139 [2020-10-14 23:30:26,156 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:30:26,160 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 [2020-10-14 23:30:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:30:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2020-10-14 23:30:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 23:30:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2020-10-14 23:30:26,210 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 20 [2020-10-14 23:30:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:26,211 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2020-10-14 23:30:26,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:30:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2020-10-14 23:30:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:30:26,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:26,213 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:26,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:30:26,214 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:26,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1080561348, now seen corresponding path program 1 times [2020-10-14 23:30:26,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:26,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749017445] [2020-10-14 23:30:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:26,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:26,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:26,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:26,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:30:26,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:26,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-14 23:30:26,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:26,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:26,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:30:26,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 23:30:26,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:30:26,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:26,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:26,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:26,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:26,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:26,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:26,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:30:26,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:26,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:26,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:26,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:26,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:26,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:26,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749017445] [2020-10-14 23:30:26,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:30:26,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:30:26,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810115570] [2020-10-14 23:30:26,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:30:26,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:30:26,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:30:26,642 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand 6 states. [2020-10-14 23:30:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:26,880 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-10-14 23:30:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:30:26,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-14 23:30:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:26,883 INFO L225 Difference]: With dead ends: 74 [2020-10-14 23:30:26,883 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:30:26,884 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 [2020-10-14 23:30:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:30:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-14 23:30:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:30:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-10-14 23:30:26,892 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 27 [2020-10-14 23:30:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:26,892 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-10-14 23:30:26,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:30:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-10-14 23:30:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:30:26,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:26,894 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:26,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:30:26,895 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2105264324, now seen corresponding path program 1 times [2020-10-14 23:30:26,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:26,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254996972] [2020-10-14 23:30:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:26,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:26,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:27,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:27,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:30:27,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:27,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-14 23:30:27,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:27,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:30:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 23:30:27,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:30:27,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:27,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:27,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:27,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:27,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:27,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:27,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:30:27,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:27,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:27,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:27,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:27,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:27,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:27,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254996972] [2020-10-14 23:30:27,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:30:27,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:30:27,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057231405] [2020-10-14 23:30:27,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:30:27,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:30:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:30:27,070 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 6 states. [2020-10-14 23:30:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:27,267 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-10-14 23:30:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:30:27,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-14 23:30:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:27,269 INFO L225 Difference]: With dead ends: 74 [2020-10-14 23:30:27,269 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:30:27,269 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 [2020-10-14 23:30:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:30:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-14 23:30:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:30:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2020-10-14 23:30:27,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 27 [2020-10-14 23:30:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:27,277 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2020-10-14 23:30:27,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:30:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2020-10-14 23:30:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:30:27,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:27,279 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:27,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:30:27,279 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash -321247536, now seen corresponding path program 1 times [2020-10-14 23:30:27,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:27,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693088094] [2020-10-14 23:30:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:27,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:27,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:27,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:27,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:27,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:30:27,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:30:27,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-14 23:30:27,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:27,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:27,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:30:27,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:27,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:30:27,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:27,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:27,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:27,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:27,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:27,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:27,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:27,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:27,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:27,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:27,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693088094] [2020-10-14 23:30:27,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:27,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:30:27,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418021173] [2020-10-14 23:30:27,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:30:27,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:27,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:30:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:30:27,948 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand 9 states. [2020-10-14 23:30:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:28,315 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-10-14 23:30:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:30:28,315 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-14 23:30:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:28,316 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:30:28,317 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:30:28,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:30:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:30:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-10-14 23:30:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 23:30:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2020-10-14 23:30:28,325 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 29 [2020-10-14 23:30:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:28,325 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2020-10-14 23:30:28,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:30:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2020-10-14 23:30:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:30:28,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:28,327 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:28,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:30:28,328 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:28,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:28,328 INFO L82 PathProgramCache]: Analyzing trace with hash 542154128, now seen corresponding path program 1 times [2020-10-14 23:30:28,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:28,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410440464] [2020-10-14 23:30:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:28,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:28,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:28,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:28,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:28,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:30:28,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:30:28,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-14 23:30:28,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:28,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:30:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:28,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:30:28,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:28,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:28,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:28,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:28,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:28,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:28,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:28,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:28,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:28,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:28,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:28,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:28,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:28,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410440464] [2020-10-14 23:30:28,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:28,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:30:28,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096124321] [2020-10-14 23:30:28,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:30:28,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:28,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:30:28,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:30:28,807 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 9 states. [2020-10-14 23:30:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:29,221 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-10-14 23:30:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:30:29,221 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-14 23:30:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:29,223 INFO L225 Difference]: With dead ends: 87 [2020-10-14 23:30:29,223 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 23:30:29,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:30:29,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 23:30:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-10-14 23:30:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 23:30:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2020-10-14 23:30:29,231 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 29 [2020-10-14 23:30:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:29,232 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2020-10-14 23:30:29,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:30:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2020-10-14 23:30:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:30:29,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:29,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:29,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:30:29,234 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:29,234 INFO L82 PathProgramCache]: Analyzing trace with hash 567443435, now seen corresponding path program 1 times [2020-10-14 23:30:29,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:29,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072331057] [2020-10-14 23:30:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:29,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:29,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:29,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:29,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:30:29,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:29,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-14 23:30:29,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:29,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:29,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:30:29,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:29,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:30:29,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:29,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:29,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:29,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:29,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:29,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:29,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:29,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:29,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:29,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:29,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:29,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:29,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:29,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072331057] [2020-10-14 23:30:29,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:29,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:30:29,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017870564] [2020-10-14 23:30:29,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:30:29,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:30:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:30:29,709 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand 10 states. [2020-10-14 23:30:30,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:30,209 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2020-10-14 23:30:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:30:30,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-14 23:30:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:30,211 INFO L225 Difference]: With dead ends: 89 [2020-10-14 23:30:30,211 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 23:30:30,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:30:30,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 23:30:30,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-14 23:30:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 23:30:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2020-10-14 23:30:30,219 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 31 [2020-10-14 23:30:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:30,219 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2020-10-14 23:30:30,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:30:30,220 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2020-10-14 23:30:30,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:30:30,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:30,221 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:30,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:30:30,222 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:30,222 INFO L82 PathProgramCache]: Analyzing trace with hash -99025338, now seen corresponding path program 2 times [2020-10-14 23:30:30,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:30,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7792838] [2020-10-14 23:30:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:30,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:30,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:30,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:30,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:30:30,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:30,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-14 23:30:30,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:30,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:30,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:30:30,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:30,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:30:30,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:30,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:30,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:30,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:30,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:30,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:30,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:30,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:30,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:30,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:30,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:30,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:30,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:30,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7792838] [2020-10-14 23:30:30,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:30,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:30:30,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436966988] [2020-10-14 23:30:30,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:30:30,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:30,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:30:30,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:30:30,714 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand 10 states. [2020-10-14 23:30:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:31,241 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2020-10-14 23:30:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:30:31,242 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-14 23:30:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:31,243 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:30:31,243 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 23:30:31,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:30:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 23:30:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2020-10-14 23:30:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 23:30:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2020-10-14 23:30:31,250 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 33 [2020-10-14 23:30:31,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:31,250 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2020-10-14 23:30:31,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:30:31,251 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2020-10-14 23:30:31,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:30:31,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:31,252 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:31,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:30:31,252 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:31,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2117726790, now seen corresponding path program 1 times [2020-10-14 23:30:31,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:31,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958143794] [2020-10-14 23:30:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:31,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:31,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:31,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:31,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:30:31,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:30:31,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-14 23:30:31,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:31,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:30:31,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:31,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:30:31,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:31,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:31,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:31,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:31,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:31,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:31,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:31,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:31,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:31,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:31,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:31,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:31,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:31,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958143794] [2020-10-14 23:30:31,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:31,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:30:31,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767017638] [2020-10-14 23:30:31,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:30:31,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:31,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:30:31,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:30:31,924 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 10 states. [2020-10-14 23:30:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:32,282 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-10-14 23:30:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:30:32,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-14 23:30:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:32,283 INFO L225 Difference]: With dead ends: 84 [2020-10-14 23:30:32,283 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 23:30:32,284 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 [2020-10-14 23:30:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 23:30:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-14 23:30:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:30:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2020-10-14 23:30:32,291 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 33 [2020-10-14 23:30:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:32,291 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2020-10-14 23:30:32,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:30:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2020-10-14 23:30:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:30:32,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:32,293 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:32,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:30:32,293 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:32,294 INFO L82 PathProgramCache]: Analyzing trace with hash 493677111, now seen corresponding path program 2 times [2020-10-14 23:30:32,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:32,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907947469] [2020-10-14 23:30:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:32,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:32,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:32,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:32,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:30:32,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:32,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-14 23:30:32,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:32,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:32,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:30:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:30:32,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:32,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:32,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:32,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:32,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:32,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:32,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:32,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:32,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:32,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:32,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:32,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:32,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:32,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907947469] [2020-10-14 23:30:32,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:32,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:30:32,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867440179] [2020-10-14 23:30:32,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:30:32,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:32,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:30:32,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:30:32,832 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 11 states. [2020-10-14 23:30:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:33,113 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-14 23:30:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:30:33,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-14 23:30:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:33,114 INFO L225 Difference]: With dead ends: 82 [2020-10-14 23:30:33,114 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 23:30:33,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:30:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 23:30:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2020-10-14 23:30:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 23:30:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2020-10-14 23:30:33,126 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 33 [2020-10-14 23:30:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:33,126 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2020-10-14 23:30:33,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:30:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2020-10-14 23:30:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:30:33,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:33,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:33,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:30:33,128 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash 793379063, now seen corresponding path program 1 times [2020-10-14 23:30:33,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:33,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984160531] [2020-10-14 23:30:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:33,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:33,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:33,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:33,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:30:33,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:33,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-14 23:30:33,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:33,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:33,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:30:33,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:33,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:30:33,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:33,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:33,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:33,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:33,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:33,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:33,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:33,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:33,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:33,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:33,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:33,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:33,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:33,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984160531] [2020-10-14 23:30:33,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:33,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:30:33,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39619821] [2020-10-14 23:30:33,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:30:33,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:33,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:30:33,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:30:33,621 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand 11 states. [2020-10-14 23:30:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:33,987 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-10-14 23:30:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:30:33,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-14 23:30:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:33,988 INFO L225 Difference]: With dead ends: 78 [2020-10-14 23:30:33,989 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:30:33,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:30:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:30:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-14 23:30:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 23:30:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2020-10-14 23:30:33,994 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 33 [2020-10-14 23:30:33,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:33,995 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2020-10-14 23:30:33,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:30:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2020-10-14 23:30:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 23:30:33,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:33,996 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:33,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:30:33,996 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:33,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2025981330, now seen corresponding path program 3 times [2020-10-14 23:30:33,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:33,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367209886] [2020-10-14 23:30:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:34,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:34,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:34,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:34,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:30:34,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-14 23:30:34,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:34,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:30:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:30:34,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:34,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:34,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:34,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:34,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:34,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:34,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:34,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:34,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:34,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:34,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:34,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:34,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:34,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367209886] [2020-10-14 23:30:34,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:34,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:30:34,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517227942] [2020-10-14 23:30:34,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:30:34,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:30:34,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:30:34,490 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand 12 states. [2020-10-14 23:30:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:35,312 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2020-10-14 23:30:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:30:35,313 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-14 23:30:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:35,314 INFO L225 Difference]: With dead ends: 102 [2020-10-14 23:30:35,314 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 23:30:35,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:30:35,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 23:30:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2020-10-14 23:30:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 23:30:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2020-10-14 23:30:35,322 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 35 [2020-10-14 23:30:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:35,323 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2020-10-14 23:30:35,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:30:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2020-10-14 23:30:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 23:30:35,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:35,324 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:35,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:30:35,324 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:35,325 INFO L82 PathProgramCache]: Analyzing trace with hash -193204974, now seen corresponding path program 1 times [2020-10-14 23:30:35,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:35,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517206573] [2020-10-14 23:30:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:35,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:35,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:35,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:35,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:30:35,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-14 23:30:35,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:35,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:30:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:30:35,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:36,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:36,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:36,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:36,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:36,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:36,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:36,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:36,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:36,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:36,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:36,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:36,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:36,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517206573] [2020-10-14 23:30:36,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:36,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:30:36,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280235682] [2020-10-14 23:30:36,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:30:36,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:30:36,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:30:36,056 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand 12 states. [2020-10-14 23:30:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:36,650 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2020-10-14 23:30:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:30:36,651 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-14 23:30:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:36,652 INFO L225 Difference]: With dead ends: 113 [2020-10-14 23:30:36,653 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:30:36,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:30:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:30:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2020-10-14 23:30:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:30:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2020-10-14 23:30:36,659 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 35 [2020-10-14 23:30:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:36,660 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2020-10-14 23:30:36,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:30:36,660 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2020-10-14 23:30:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 23:30:36,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:36,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:36,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:30:36,661 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:36,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1396553261, now seen corresponding path program 4 times [2020-10-14 23:30:36,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:36,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984703277] [2020-10-14 23:30:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:36,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:36,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:37,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:37,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 23:30:37,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:37,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-14 23:30:37,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:37,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:37,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:30:37,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:37,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:30:37,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:37,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:37,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:37,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:37,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:37,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:37,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:30:37,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:37,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:37,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:37,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984703277] [2020-10-14 23:30:37,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:37,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:30:37,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32315133] [2020-10-14 23:30:37,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:30:37,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:37,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:30:37,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:30:37,475 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand 13 states. [2020-10-14 23:30:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:38,576 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2020-10-14 23:30:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:30:38,577 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-14 23:30:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:38,578 INFO L225 Difference]: With dead ends: 117 [2020-10-14 23:30:38,578 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 23:30:38,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:30:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 23:30:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2020-10-14 23:30:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:30:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2020-10-14 23:30:38,587 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 37 [2020-10-14 23:30:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:38,589 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2020-10-14 23:30:38,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:30:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2020-10-14 23:30:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:30:38,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:38,590 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:38,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:30:38,590 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2106567688, now seen corresponding path program 5 times [2020-10-14 23:30:38,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:38,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413507090] [2020-10-14 23:30:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:38,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:39,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:39,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:30:39,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:39,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-14 23:30:39,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:39,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:30:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:30:39,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:39,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:39,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:39,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:39,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:39,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:39,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:39,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:39,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:39,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:39,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413507090] [2020-10-14 23:30:39,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:39,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:30:39,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318739786] [2020-10-14 23:30:39,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:30:39,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:30:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:30:39,695 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand 13 states. [2020-10-14 23:30:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:40,424 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2020-10-14 23:30:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:30:40,424 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-14 23:30:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:40,425 INFO L225 Difference]: With dead ends: 119 [2020-10-14 23:30:40,425 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:30:40,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:30:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:30:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-10-14 23:30:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 23:30:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2020-10-14 23:30:40,432 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 39 [2020-10-14 23:30:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:40,432 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2020-10-14 23:30:40,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:30:40,432 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2020-10-14 23:30:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:30:40,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:40,433 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:40,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:30:40,433 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:40,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1168680440, now seen corresponding path program 2 times [2020-10-14 23:30:40,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:40,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005378883] [2020-10-14 23:30:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:40,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:40,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:40,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:40,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:41,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:42,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:42,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:30:42,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:30:42,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1906 [2020-10-14 23:30:42,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:42,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:30:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:30:42,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:42,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:42,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:42,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:42,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:42,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:42,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:42,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:42,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:42,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:42,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:42,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:42,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:30:42,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005378883] [2020-10-14 23:30:42,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:42,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:30:42,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599814631] [2020-10-14 23:30:42,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:30:42,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:42,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:30:42,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:30:42,470 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 11 states. [2020-10-14 23:30:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:42,801 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2020-10-14 23:30:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:30:42,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-14 23:30:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:42,803 INFO L225 Difference]: With dead ends: 106 [2020-10-14 23:30:42,803 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 23:30:42,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:30:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 23:30:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-14 23:30:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 23:30:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2020-10-14 23:30:42,809 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 39 [2020-10-14 23:30:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:42,810 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2020-10-14 23:30:42,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:30:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2020-10-14 23:30:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:30:42,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:42,811 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:42,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:30:42,811 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash 462970809, now seen corresponding path program 6 times [2020-10-14 23:30:42,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:42,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364226511] [2020-10-14 23:30:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:42,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:42,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:43,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:43,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:30:43,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:43,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-14 23:30:43,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:43,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:43,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:30:43,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:43,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:30:43,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:43,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:43,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:43,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:43,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:43,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:43,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:43,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:43,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:43,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:43,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:43,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:43,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:43,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364226511] [2020-10-14 23:30:43,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:43,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:30:43,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269113013] [2020-10-14 23:30:43,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:30:43,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:30:43,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:30:43,558 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 14 states. [2020-10-14 23:30:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:44,205 INFO L93 Difference]: Finished difference Result 113 states and 138 transitions. [2020-10-14 23:30:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:30:44,205 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-14 23:30:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:44,206 INFO L225 Difference]: With dead ends: 113 [2020-10-14 23:30:44,207 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 23:30:44,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:30:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 23:30:44,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2020-10-14 23:30:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 23:30:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2020-10-14 23:30:44,216 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 39 [2020-10-14 23:30:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:44,216 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2020-10-14 23:30:44,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:30:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2020-10-14 23:30:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:30:44,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:44,217 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:44,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:30:44,218 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1472700216, now seen corresponding path program 1 times [2020-10-14 23:30:44,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:44,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283308780] [2020-10-14 23:30:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:44,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:44,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:44,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:45,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:45,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:30:45,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:30:45,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-14 23:30:45,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:45,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:30:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:30:45,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:45,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:45,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:45,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:45,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:45,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:45,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:45,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:45,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:45,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:45,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:45,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:45,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:30:45,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283308780] [2020-10-14 23:30:45,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:45,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:30:45,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848032053] [2020-10-14 23:30:45,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:30:45,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:45,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:30:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:30:45,355 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand 12 states. [2020-10-14 23:30:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:45,902 INFO L93 Difference]: Finished difference Result 123 states and 149 transitions. [2020-10-14 23:30:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:30:45,907 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-14 23:30:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:45,908 INFO L225 Difference]: With dead ends: 123 [2020-10-14 23:30:45,908 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 23:30:45,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:30:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 23:30:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2020-10-14 23:30:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 23:30:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2020-10-14 23:30:45,914 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 39 [2020-10-14 23:30:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:45,915 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2020-10-14 23:30:45,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:30:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2020-10-14 23:30:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:30:45,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:45,916 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:45,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:30:45,916 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:45,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1221933176, now seen corresponding path program 2 times [2020-10-14 23:30:45,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:45,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029815978] [2020-10-14 23:30:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:45,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:45,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:46,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:46,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:30:46,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:46,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-14 23:30:46,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:46,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:46,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:30:46,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:46,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:30:46,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:46,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:46,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:46,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:46,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:46,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:46,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:46,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:46,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:46,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:46,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:46,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:46,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029815978] [2020-10-14 23:30:46,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:46,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:30:46,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612362492] [2020-10-14 23:30:46,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:30:46,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:46,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:30:46,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:30:46,586 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 13 states. [2020-10-14 23:30:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:47,290 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2020-10-14 23:30:47,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:30:47,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-14 23:30:47,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:47,293 INFO L225 Difference]: With dead ends: 120 [2020-10-14 23:30:47,293 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 23:30:47,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:30:47,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 23:30:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-14 23:30:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:30:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2020-10-14 23:30:47,301 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 39 [2020-10-14 23:30:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:47,301 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2020-10-14 23:30:47,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:30:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2020-10-14 23:30:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:30:47,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:47,302 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:47,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:30:47,303 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:47,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1434421049, now seen corresponding path program 2 times [2020-10-14 23:30:47,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:47,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438632872] [2020-10-14 23:30:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:47,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:47,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:47,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:47,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:30:47,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:47,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-14 23:30:47,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:47,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:47,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:30:47,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:47,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:30:47,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:48,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:48,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:48,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:48,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:48,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:48,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:48,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:48,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:48,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:48,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:48,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:48,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:48,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438632872] [2020-10-14 23:30:48,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:48,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:30:48,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378375454] [2020-10-14 23:30:48,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:30:48,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:30:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:30:48,170 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand 14 states. [2020-10-14 23:30:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:48,782 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-10-14 23:30:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:30:48,782 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-14 23:30:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:48,783 INFO L225 Difference]: With dead ends: 105 [2020-10-14 23:30:48,783 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 23:30:48,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:30:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 23:30:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-14 23:30:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 23:30:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2020-10-14 23:30:48,790 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 39 [2020-10-14 23:30:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:48,790 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2020-10-14 23:30:48,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:30:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2020-10-14 23:30:48,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 23:30:48,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:48,791 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:48,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:30:48,791 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:48,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1712971116, now seen corresponding path program 7 times [2020-10-14 23:30:48,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:48,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654508262] [2020-10-14 23:30:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:48,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:48,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:49,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:49,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 23:30:49,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:49,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-14 23:30:49,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:49,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:30:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:30:49,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:49,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:49,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:49,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:49,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:49,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:49,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:49,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:49,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:49,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:49,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:49,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:49,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:49,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654508262] [2020-10-14 23:30:49,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:49,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:30:49,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926383936] [2020-10-14 23:30:49,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:30:49,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:49,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:30:49,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:30:49,649 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand 15 states. [2020-10-14 23:30:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:50,908 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2020-10-14 23:30:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:30:50,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-14 23:30:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:50,910 INFO L225 Difference]: With dead ends: 144 [2020-10-14 23:30:50,910 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 23:30:50,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:30:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 23:30:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 124. [2020-10-14 23:30:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 23:30:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2020-10-14 23:30:50,919 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 41 [2020-10-14 23:30:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:50,919 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2020-10-14 23:30:50,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:30:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2020-10-14 23:30:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 23:30:50,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:50,920 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:50,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:30:50,921 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:50,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1167211220, now seen corresponding path program 3 times [2020-10-14 23:30:50,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:50,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903765846] [2020-10-14 23:30:50,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:50,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:50,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:51,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:51,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 23:30:51,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:51,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-14 23:30:51,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:51,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:51,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:30:51,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:51,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:30:51,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:52,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:52,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:52,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:52,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:52,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:52,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:30:52,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:52,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:52,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:52,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:52,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:52,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:52,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903765846] [2020-10-14 23:30:52,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:52,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:30:52,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167698524] [2020-10-14 23:30:52,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:30:52,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:52,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:30:52,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:30:52,093 INFO L87 Difference]: Start difference. First operand 124 states and 151 transitions. Second operand 15 states. [2020-10-14 23:30:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:53,376 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2020-10-14 23:30:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:30:53,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-14 23:30:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:53,379 INFO L225 Difference]: With dead ends: 151 [2020-10-14 23:30:53,379 INFO L226 Difference]: Without dead ends: 145 [2020-10-14 23:30:53,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:30:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-14 23:30:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2020-10-14 23:30:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 23:30:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2020-10-14 23:30:53,388 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 41 [2020-10-14 23:30:53,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:53,388 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2020-10-14 23:30:53,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:30:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2020-10-14 23:30:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 23:30:53,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:53,389 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:53,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:30:53,390 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:53,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:53,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1144087889, now seen corresponding path program 8 times [2020-10-14 23:30:53,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:53,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967367245] [2020-10-14 23:30:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:53,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:53,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:53,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:53,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 23:30:53,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:53,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-14 23:30:53,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:53,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:30:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:30:53,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:54,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:54,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:54,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:54,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:54,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:54,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:54,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:54,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:54,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:54,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:54,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:54,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:54,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967367245] [2020-10-14 23:30:54,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:54,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:30:54,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083965836] [2020-10-14 23:30:54,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:30:54,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:54,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:30:54,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:30:54,604 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 16 states. [2020-10-14 23:30:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:55,653 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2020-10-14 23:30:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:30:55,655 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-14 23:30:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:55,657 INFO L225 Difference]: With dead ends: 161 [2020-10-14 23:30:55,657 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 23:30:55,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:30:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 23:30:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2020-10-14 23:30:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 23:30:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 171 transitions. [2020-10-14 23:30:55,667 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 171 transitions. Word has length 43 [2020-10-14 23:30:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:55,668 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 171 transitions. [2020-10-14 23:30:55,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:30:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 171 transitions. [2020-10-14 23:30:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:30:55,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:55,669 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:55,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:30:55,669 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash 91846666, now seen corresponding path program 9 times [2020-10-14 23:30:55,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:55,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434058939] [2020-10-14 23:30:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:55,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:55,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:56,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:56,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:30:56,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:56,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-14 23:30:56,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:56,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:30:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:30:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:57,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:57,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:57,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:57,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:57,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:57,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:57,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:57,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:57,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:57,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434058939] [2020-10-14 23:30:57,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:57,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:30:57,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106018717] [2020-10-14 23:30:57,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:30:57,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:57,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:30:57,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:30:57,165 INFO L87 Difference]: Start difference. First operand 141 states and 171 transitions. Second operand 16 states. [2020-10-14 23:30:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:58,466 INFO L93 Difference]: Finished difference Result 163 states and 194 transitions. [2020-10-14 23:30:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:30:58,467 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-14 23:30:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:58,468 INFO L225 Difference]: With dead ends: 163 [2020-10-14 23:30:58,468 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 23:30:58,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:30:58,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 23:30:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-14 23:30:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-14 23:30:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2020-10-14 23:30:58,477 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 45 [2020-10-14 23:30:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:58,477 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2020-10-14 23:30:58,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:30:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2020-10-14 23:30:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:30:58,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:58,478 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:58,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:30:58,479 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1143210875, now seen corresponding path program 10 times [2020-10-14 23:30:58,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:58,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080540569] [2020-10-14 23:30:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:58,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:58,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:59,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:59,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:30:59,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:30:59,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-14 23:30:59,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:59,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:59,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:30:59,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:30:59,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:30:59,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:59,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:59,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:59,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:59,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:59,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:59,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:59,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:59,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:59,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:30:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:59,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080540569] [2020-10-14 23:30:59,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:30:59,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:30:59,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366210140] [2020-10-14 23:30:59,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:30:59,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:59,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:30:59,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:30:59,649 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand 17 states. [2020-10-14 23:31:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:01,013 INFO L93 Difference]: Finished difference Result 148 states and 177 transitions. [2020-10-14 23:31:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:31:01,013 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-14 23:31:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:01,014 INFO L225 Difference]: With dead ends: 148 [2020-10-14 23:31:01,015 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 23:31:01,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:31:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 23:31:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2020-10-14 23:31:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 23:31:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2020-10-14 23:31:01,025 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 45 [2020-10-14 23:31:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:01,025 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2020-10-14 23:31:01,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:31:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2020-10-14 23:31:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:31:01,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:01,026 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:01,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:31:01,026 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:01,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1085122870, now seen corresponding path program 3 times [2020-10-14 23:31:01,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:01,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308489735] [2020-10-14 23:31:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:01,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:01,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:01,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:03,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:03,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:31:03,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:31:03,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2527 [2020-10-14 23:31:03,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:03,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:03,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:31:03,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:03,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:31:03,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:03,884 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-14 23:31:04,032 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-14 23:31:04,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:04,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:04,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:04,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:04,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:04,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:04,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:04,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:31:04,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308489735] [2020-10-14 23:31:04,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:04,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:31:04,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38624740] [2020-10-14 23:31:04,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:31:04,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:04,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:31:04,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:31:04,265 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand 14 states. [2020-10-14 23:31:04,963 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-14 23:31:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:05,315 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2020-10-14 23:31:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:31:05,316 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-14 23:31:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:05,317 INFO L225 Difference]: With dead ends: 158 [2020-10-14 23:31:05,317 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 23:31:05,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:31:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 23:31:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2020-10-14 23:31:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 23:31:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2020-10-14 23:31:05,331 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 45 [2020-10-14 23:31:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:05,331 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2020-10-14 23:31:05,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:31:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2020-10-14 23:31:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:31:05,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:05,332 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:05,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:31:05,332 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:05,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1190351478, now seen corresponding path program 4 times [2020-10-14 23:31:05,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:05,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545618946] [2020-10-14 23:31:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:05,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:05,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:05,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:06,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:06,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:31:06,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:31:06,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1289 [2020-10-14 23:31:06,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:06,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:31:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:31:06,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:06,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:06,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:06,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:06,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:06,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:06,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:31:06,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:06,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:06,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:06,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:06,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:06,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:31:06,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545618946] [2020-10-14 23:31:06,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:06,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:31:06,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229843325] [2020-10-14 23:31:06,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:31:06,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:06,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:31:06,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:31:06,974 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 15 states. [2020-10-14 23:31:07,767 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-14 23:31:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:08,098 INFO L93 Difference]: Finished difference Result 160 states and 189 transitions. [2020-10-14 23:31:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:31:08,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-14 23:31:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:08,099 INFO L225 Difference]: With dead ends: 160 [2020-10-14 23:31:08,099 INFO L226 Difference]: Without dead ends: 143 [2020-10-14 23:31:08,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:31:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-14 23:31:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2020-10-14 23:31:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 23:31:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 162 transitions. [2020-10-14 23:31:08,108 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 162 transitions. Word has length 45 [2020-10-14 23:31:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:08,108 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 162 transitions. [2020-10-14 23:31:08,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:31:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 162 transitions. [2020-10-14 23:31:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:31:08,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:08,109 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:08,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:31:08,110 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:08,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:08,110 INFO L82 PathProgramCache]: Analyzing trace with hash -721394614, now seen corresponding path program 4 times [2020-10-14 23:31:08,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:08,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481315930] [2020-10-14 23:31:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:08,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:08,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:08,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:08,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:31:08,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:08,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-14 23:31:08,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:08,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:31:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:31:08,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:08,920 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-14 23:31:09,144 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2020-10-14 23:31:09,288 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 59 [2020-10-14 23:31:09,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:09,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:09,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:09,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:09,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:09,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:09,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:09,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:09,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:09,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:09,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:09,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481315930] [2020-10-14 23:31:09,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:09,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:31:09,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406541024] [2020-10-14 23:31:09,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:31:09,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:31:09,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:31:09,463 INFO L87 Difference]: Start difference. First operand 135 states and 162 transitions. Second operand 16 states. [2020-10-14 23:31:10,250 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 23:31:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:10,772 INFO L93 Difference]: Finished difference Result 157 states and 185 transitions. [2020-10-14 23:31:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:31:10,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-14 23:31:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:10,774 INFO L225 Difference]: With dead ends: 157 [2020-10-14 23:31:10,774 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 23:31:10,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:31:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 23:31:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2020-10-14 23:31:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 23:31:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2020-10-14 23:31:10,782 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 45 [2020-10-14 23:31:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:10,783 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2020-10-14 23:31:10,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:31:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2020-10-14 23:31:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:31:10,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:10,784 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:10,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:31:10,784 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:10,784 INFO L82 PathProgramCache]: Analyzing trace with hash 824441787, now seen corresponding path program 5 times [2020-10-14 23:31:10,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:10,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688239972] [2020-10-14 23:31:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:10,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:10,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:11,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:11,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:31:11,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:11,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-14 23:31:11,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:11,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:11,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:31:11,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:11,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:31:11,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:11,966 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-14 23:31:12,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:12,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:12,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:12,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:12,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:12,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:12,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:12,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:12,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:12,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688239972] [2020-10-14 23:31:12,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:12,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:31:12,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774041840] [2020-10-14 23:31:12,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:31:12,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:31:12,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:31:12,256 INFO L87 Difference]: Start difference. First operand 130 states and 156 transitions. Second operand 17 states. [2020-10-14 23:31:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:13,298 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2020-10-14 23:31:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:31:13,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-14 23:31:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:13,301 INFO L225 Difference]: With dead ends: 138 [2020-10-14 23:31:13,301 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 23:31:13,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:31:13,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 23:31:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-14 23:31:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 23:31:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2020-10-14 23:31:13,309 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 45 [2020-10-14 23:31:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:13,309 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2020-10-14 23:31:13,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:31:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2020-10-14 23:31:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 23:31:13,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:13,310 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:13,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:31:13,311 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:13,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:13,311 INFO L82 PathProgramCache]: Analyzing trace with hash -837296682, now seen corresponding path program 11 times [2020-10-14 23:31:13,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:13,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941888241] [2020-10-14 23:31:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:13,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:13,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:13,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:13,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 23:31:13,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:13,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-14 23:31:13,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:13,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:13,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:31:13,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:13,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:31:13,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:14,243 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-14 23:31:14,383 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-14 23:31:14,590 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-14 23:31:14,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:14,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:14,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:14,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:14,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:14,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:14,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:14,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:14,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:14,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941888241] [2020-10-14 23:31:14,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:14,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:31:14,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106262707] [2020-10-14 23:31:14,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:31:14,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:14,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:31:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:31:14,865 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand 18 states. [2020-10-14 23:31:15,827 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-14 23:31:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:16,420 INFO L93 Difference]: Finished difference Result 194 states and 227 transitions. [2020-10-14 23:31:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:31:16,423 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-14 23:31:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:16,424 INFO L225 Difference]: With dead ends: 194 [2020-10-14 23:31:16,424 INFO L226 Difference]: Without dead ends: 190 [2020-10-14 23:31:16,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:31:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-14 23:31:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2020-10-14 23:31:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-14 23:31:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 195 transitions. [2020-10-14 23:31:16,434 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 195 transitions. Word has length 47 [2020-10-14 23:31:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:16,434 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 195 transitions. [2020-10-14 23:31:16,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:31:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 195 transitions. [2020-10-14 23:31:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 23:31:16,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:16,435 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:16,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:31:16,435 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash -956242218, now seen corresponding path program 5 times [2020-10-14 23:31:16,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:16,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677547635] [2020-10-14 23:31:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:16,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:16,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:17,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:17,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 23:31:17,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:17,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 606 [2020-10-14 23:31:17,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:17,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:17,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:31:17,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:17,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:31:17,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:17,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:17,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:17,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:17,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:17,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:17,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:17,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:17,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:17,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:17,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:17,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:17,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:17,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677547635] [2020-10-14 23:31:17,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:17,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:31:17,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579757665] [2020-10-14 23:31:17,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:31:17,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:17,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:31:17,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:31:17,668 INFO L87 Difference]: Start difference. First operand 164 states and 195 transitions. Second operand 18 states. [2020-10-14 23:31:18,385 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-14 23:31:18,775 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-14 23:31:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:19,369 INFO L93 Difference]: Finished difference Result 195 states and 229 transitions. [2020-10-14 23:31:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:31:19,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-14 23:31:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:19,371 INFO L225 Difference]: With dead ends: 195 [2020-10-14 23:31:19,371 INFO L226 Difference]: Without dead ends: 189 [2020-10-14 23:31:19,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:31:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-14 23:31:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 173. [2020-10-14 23:31:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 23:31:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2020-10-14 23:31:19,380 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 47 [2020-10-14 23:31:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:19,380 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2020-10-14 23:31:19,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:31:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2020-10-14 23:31:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 23:31:19,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:19,382 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:19,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:31:19,382 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:19,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1434546831, now seen corresponding path program 12 times [2020-10-14 23:31:19,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:19,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710760963] [2020-10-14 23:31:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:19,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:19,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:19,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:19,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 23:31:19,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:19,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-14 23:31:19,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:19,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:31:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:31:19,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:20,180 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-14 23:31:20,343 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-14 23:31:20,555 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-14 23:31:20,706 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-14 23:31:20,857 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-14 23:31:21,007 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-14 23:31:21,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:21,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:21,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:21,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:21,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:21,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:31:21,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:21,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:21,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:21,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:21,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:21,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:21,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710760963] [2020-10-14 23:31:21,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:21,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:31:21,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620037796] [2020-10-14 23:31:21,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:31:21,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:21,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:31:21,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:31:21,255 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand 19 states. [2020-10-14 23:31:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:22,647 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2020-10-14 23:31:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:31:22,647 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-14 23:31:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:22,649 INFO L225 Difference]: With dead ends: 213 [2020-10-14 23:31:22,649 INFO L226 Difference]: Without dead ends: 209 [2020-10-14 23:31:22,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:31:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-14 23:31:22,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 183. [2020-10-14 23:31:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-14 23:31:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 217 transitions. [2020-10-14 23:31:22,661 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 217 transitions. Word has length 49 [2020-10-14 23:31:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:22,661 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 217 transitions. [2020-10-14 23:31:22,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:31:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 217 transitions. [2020-10-14 23:31:22,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:31:22,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:22,663 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:22,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:31:22,663 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:22,663 INFO L82 PathProgramCache]: Analyzing trace with hash 133677644, now seen corresponding path program 13 times [2020-10-14 23:31:22,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:22,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213884116] [2020-10-14 23:31:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:22,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:22,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:23,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:23,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:31:23,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:23,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-14 23:31:23,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:23,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:23,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:31:23,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:23,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:31:23,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:24,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:24,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:24,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:24,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:24,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:24,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:24,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:24,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:24,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:24,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:24,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:24,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:24,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213884116] [2020-10-14 23:31:24,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:24,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:31:24,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777708787] [2020-10-14 23:31:24,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:31:24,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:24,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:31:24,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:31:24,364 INFO L87 Difference]: Start difference. First operand 183 states and 217 transitions. Second operand 19 states. [2020-10-14 23:31:25,366 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-14 23:31:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:26,069 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2020-10-14 23:31:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:31:26,069 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-14 23:31:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:26,071 INFO L225 Difference]: With dead ends: 215 [2020-10-14 23:31:26,071 INFO L226 Difference]: Without dead ends: 196 [2020-10-14 23:31:26,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:31:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-14 23:31:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2020-10-14 23:31:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 23:31:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2020-10-14 23:31:26,080 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 51 [2020-10-14 23:31:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:26,081 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2020-10-14 23:31:26,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:31:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2020-10-14 23:31:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:31:26,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:26,082 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:26,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:31:26,082 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:26,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1177367933, now seen corresponding path program 14 times [2020-10-14 23:31:26,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:26,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018273892] [2020-10-14 23:31:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:26,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:26,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:26,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:26,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:31:26,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:26,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-14 23:31:26,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:26,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:31:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:31:26,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:27,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:27,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:27,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:27,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:27,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:27,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:27,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:27,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:27,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018273892] [2020-10-14 23:31:27,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:27,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:31:27,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723371248] [2020-10-14 23:31:27,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:31:27,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:27,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:31:27,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:31:27,883 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand 20 states. [2020-10-14 23:31:29,155 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-10-14 23:31:29,345 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-14 23:31:29,516 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-14 23:31:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:30,110 INFO L93 Difference]: Finished difference Result 230 states and 268 transitions. [2020-10-14 23:31:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:31:30,111 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-14 23:31:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:30,112 INFO L225 Difference]: With dead ends: 230 [2020-10-14 23:31:30,112 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 23:31:30,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:31:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 23:31:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 191. [2020-10-14 23:31:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-14 23:31:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 227 transitions. [2020-10-14 23:31:30,122 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 227 transitions. Word has length 51 [2020-10-14 23:31:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:30,122 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 227 transitions. [2020-10-14 23:31:30,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:31:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 227 transitions. [2020-10-14 23:31:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:31:30,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:30,123 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:30,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:31:30,124 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:30,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:30,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1171895540, now seen corresponding path program 6 times [2020-10-14 23:31:30,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:30,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551102779] [2020-10-14 23:31:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:30,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:30,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:30,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:30,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:33,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:33,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:31:33,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:31:33,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3275 [2020-10-14 23:31:33,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:33,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:33,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:31:33,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:33,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:31:33,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:34,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:34,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:34,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:34,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:34,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:34,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:34,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:34,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:34,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:34,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:34,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:34,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:31:34,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551102779] [2020-10-14 23:31:34,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:34,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:31:34,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540267944] [2020-10-14 23:31:34,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:31:34,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:31:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:31:34,108 INFO L87 Difference]: Start difference. First operand 191 states and 227 transitions. Second operand 16 states. [2020-10-14 23:31:34,704 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-14 23:31:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:35,089 INFO L93 Difference]: Finished difference Result 230 states and 270 transitions. [2020-10-14 23:31:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:31:35,090 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-14 23:31:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:35,091 INFO L225 Difference]: With dead ends: 230 [2020-10-14 23:31:35,091 INFO L226 Difference]: Without dead ends: 203 [2020-10-14 23:31:35,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:31:35,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-14 23:31:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 193. [2020-10-14 23:31:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 23:31:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2020-10-14 23:31:35,102 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 51 [2020-10-14 23:31:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:35,102 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2020-10-14 23:31:35,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:31:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2020-10-14 23:31:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:31:35,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:35,103 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:35,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:31:35,104 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash 83136972, now seen corresponding path program 7 times [2020-10-14 23:31:35,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:35,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797815798] [2020-10-14 23:31:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:35,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:35,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:35,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:35,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:36,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:36,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:31:36,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:31:36,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1856 [2020-10-14 23:31:36,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:36,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:36,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:31:36,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:36,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:31:36,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:37,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:37,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:37,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:37,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:37,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:37,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:37,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:37,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:37,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:31:37,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797815798] [2020-10-14 23:31:37,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:37,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:31:37,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111809343] [2020-10-14 23:31:37,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:31:37,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:31:37,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:31:37,854 INFO L87 Difference]: Start difference. First operand 193 states and 227 transitions. Second operand 17 states. [2020-10-14 23:31:38,357 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-14 23:31:38,515 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-14 23:31:38,827 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-10-14 23:31:39,097 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-14 23:31:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:39,475 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2020-10-14 23:31:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:31:39,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-14 23:31:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:39,477 INFO L225 Difference]: With dead ends: 220 [2020-10-14 23:31:39,478 INFO L226 Difference]: Without dead ends: 201 [2020-10-14 23:31:39,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:31:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-14 23:31:39,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2020-10-14 23:31:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 23:31:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 226 transitions. [2020-10-14 23:31:39,488 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 226 transitions. Word has length 51 [2020-10-14 23:31:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:39,488 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 226 transitions. [2020-10-14 23:31:39,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:31:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 226 transitions. [2020-10-14 23:31:39,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:31:39,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:39,489 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:39,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:31:39,489 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2037659788, now seen corresponding path program 8 times [2020-10-14 23:31:39,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:39,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260391597] [2020-10-14 23:31:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:39,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:39,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:39,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:40,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:40,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:31:40,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:31:40,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1181 [2020-10-14 23:31:40,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:40,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:31:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:31:40,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:41,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:41,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:41,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:41,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:41,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:41,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:41,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:41,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:41,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:31:41,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260391597] [2020-10-14 23:31:41,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:41,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:31:41,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943121725] [2020-10-14 23:31:41,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:31:41,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:41,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:31:41,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:31:41,479 INFO L87 Difference]: Start difference. First operand 193 states and 226 transitions. Second operand 18 states. [2020-10-14 23:31:42,394 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-14 23:31:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:42,872 INFO L93 Difference]: Finished difference Result 220 states and 254 transitions. [2020-10-14 23:31:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:31:42,873 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-14 23:31:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:42,875 INFO L225 Difference]: With dead ends: 220 [2020-10-14 23:31:42,875 INFO L226 Difference]: Without dead ends: 201 [2020-10-14 23:31:42,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:31:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-14 23:31:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2020-10-14 23:31:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 23:31:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 225 transitions. [2020-10-14 23:31:42,887 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 225 transitions. Word has length 51 [2020-10-14 23:31:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:42,888 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 225 transitions. [2020-10-14 23:31:42,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:31:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 225 transitions. [2020-10-14 23:31:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:31:42,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:42,889 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:42,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:31:42,889 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:42,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1733640012, now seen corresponding path program 6 times [2020-10-14 23:31:42,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:42,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377363685] [2020-10-14 23:31:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:42,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:42,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:43,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:43,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:31:43,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:43,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-14 23:31:43,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:43,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:43,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:31:43,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:43,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:31:43,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:44,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:44,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:44,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:44,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:44,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:44,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:44,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:44,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:44,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:44,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:44,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:44,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:44,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377363685] [2020-10-14 23:31:44,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:44,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:31:44,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948158781] [2020-10-14 23:31:44,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:31:44,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:44,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:31:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:31:44,451 INFO L87 Difference]: Start difference. First operand 193 states and 225 transitions. Second operand 19 states. [2020-10-14 23:31:45,576 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-14 23:31:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:46,155 INFO L93 Difference]: Finished difference Result 217 states and 250 transitions. [2020-10-14 23:31:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:31:46,156 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-14 23:31:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:46,158 INFO L225 Difference]: With dead ends: 217 [2020-10-14 23:31:46,158 INFO L226 Difference]: Without dead ends: 198 [2020-10-14 23:31:46,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:31:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-14 23:31:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 188. [2020-10-14 23:31:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-14 23:31:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 219 transitions. [2020-10-14 23:31:46,171 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 219 transitions. Word has length 51 [2020-10-14 23:31:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:46,173 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 219 transitions. [2020-10-14 23:31:46,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:31:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 219 transitions. [2020-10-14 23:31:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:31:46,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:46,175 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:46,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:31:46,176 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1223736957, now seen corresponding path program 9 times [2020-10-14 23:31:46,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:46,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64429517] [2020-10-14 23:31:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:46,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:46,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:46,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 23:31:46,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:46,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-14 23:31:46,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:46,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:46,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:31:46,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:46,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:31:46,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:47,494 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-14 23:31:47,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:47,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:47,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:47,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:47,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:47,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:47,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:47,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:47,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:47,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64429517] [2020-10-14 23:31:47,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:47,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:31:47,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791663879] [2020-10-14 23:31:47,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:31:47,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:47,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:31:47,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:31:47,869 INFO L87 Difference]: Start difference. First operand 188 states and 219 transitions. Second operand 20 states. [2020-10-14 23:31:48,720 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-14 23:31:48,900 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-14 23:31:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:49,323 INFO L93 Difference]: Finished difference Result 213 states and 246 transitions. [2020-10-14 23:31:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:31:49,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-14 23:31:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:49,325 INFO L225 Difference]: With dead ends: 213 [2020-10-14 23:31:49,325 INFO L226 Difference]: Without dead ends: 207 [2020-10-14 23:31:49,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:31:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-14 23:31:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2020-10-14 23:31:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-14 23:31:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 227 transitions. [2020-10-14 23:31:49,337 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 227 transitions. Word has length 51 [2020-10-14 23:31:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:49,337 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 227 transitions. [2020-10-14 23:31:49,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:31:49,338 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 227 transitions. [2020-10-14 23:31:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 23:31:49,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:49,339 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:49,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:31:49,339 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1922864984, now seen corresponding path program 15 times [2020-10-14 23:31:49,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:49,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589340677] [2020-10-14 23:31:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:49,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:49,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:50,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:50,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 23:31:50,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:50,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-14 23:31:50,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:50,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:31:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:31:50,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:50,627 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-14 23:31:51,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:51,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:51,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:51,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:51,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:51,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:31:51,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:51,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:51,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:51,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:51,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:51,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:51,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589340677] [2020-10-14 23:31:51,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:51,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:31:51,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417609322] [2020-10-14 23:31:51,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:31:51,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:51,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:31:51,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:31:51,268 INFO L87 Difference]: Start difference. First operand 195 states and 227 transitions. Second operand 21 states. [2020-10-14 23:31:52,445 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-14 23:31:52,636 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-14 23:31:52,981 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-14 23:31:53,171 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-14 23:31:53,636 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2020-10-14 23:31:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:54,567 INFO L93 Difference]: Finished difference Result 244 states and 279 transitions. [2020-10-14 23:31:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:31:54,568 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-14 23:31:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:54,570 INFO L225 Difference]: With dead ends: 244 [2020-10-14 23:31:54,570 INFO L226 Difference]: Without dead ends: 240 [2020-10-14 23:31:54,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:31:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-14 23:31:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 214. [2020-10-14 23:31:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 23:31:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2020-10-14 23:31:54,582 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 248 transitions. Word has length 53 [2020-10-14 23:31:54,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:54,583 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 248 transitions. [2020-10-14 23:31:54,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:31:54,583 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 248 transitions. [2020-10-14 23:31:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 23:31:54,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:54,584 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:54,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:31:54,584 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:54,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:54,584 INFO L82 PathProgramCache]: Analyzing trace with hash 732516632, now seen corresponding path program 7 times [2020-10-14 23:31:54,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:54,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704887743] [2020-10-14 23:31:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:54,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:55,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:55,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 23:31:55,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:55,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-14 23:31:55,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:55,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:55,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:31:55,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:55,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:31:55,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:56,035 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-14 23:31:56,253 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-14 23:31:56,411 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-14 23:31:56,543 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-14 23:31:56,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:56,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:56,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:56,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:56,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:56,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:56,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:56,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:56,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:56,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:56,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:56,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:56,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704887743] [2020-10-14 23:31:56,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:56,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:31:56,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889713516] [2020-10-14 23:31:56,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:31:56,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:56,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:31:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:31:56,965 INFO L87 Difference]: Start difference. First operand 214 states and 248 transitions. Second operand 21 states. [2020-10-14 23:31:57,933 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-14 23:31:58,114 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-14 23:31:58,473 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-14 23:31:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:59,211 INFO L93 Difference]: Finished difference Result 247 states and 284 transitions. [2020-10-14 23:31:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:31:59,212 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-14 23:31:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:59,214 INFO L225 Difference]: With dead ends: 247 [2020-10-14 23:31:59,214 INFO L226 Difference]: Without dead ends: 241 [2020-10-14 23:31:59,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:31:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-14 23:31:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 223. [2020-10-14 23:31:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-14 23:31:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 259 transitions. [2020-10-14 23:31:59,225 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 259 transitions. Word has length 53 [2020-10-14 23:31:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:59,226 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 259 transitions. [2020-10-14 23:31:59,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:31:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 259 transitions. [2020-10-14 23:31:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 23:31:59,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:59,226 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:59,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:31:59,227 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1085992563, now seen corresponding path program 16 times [2020-10-14 23:31:59,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:59,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682885647] [2020-10-14 23:31:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:59,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:59,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:59,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 23:31:59,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:59,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-14 23:31:59,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:59,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:31:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:31:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:31:59,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:00,660 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 23:32:01,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:01,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:01,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:01,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:01,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:01,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:01,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:01,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:01,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:01,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:01,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682885647] [2020-10-14 23:32:01,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:01,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:32:01,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98875733] [2020-10-14 23:32:01,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:32:01,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:01,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:32:01,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:32:01,462 INFO L87 Difference]: Start difference. First operand 223 states and 259 transitions. Second operand 22 states. [2020-10-14 23:32:02,659 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-14 23:32:03,042 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-14 23:32:03,460 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-14 23:32:04,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:04,576 INFO L93 Difference]: Finished difference Result 265 states and 303 transitions. [2020-10-14 23:32:04,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:32:04,577 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-14 23:32:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:04,579 INFO L225 Difference]: With dead ends: 265 [2020-10-14 23:32:04,579 INFO L226 Difference]: Without dead ends: 261 [2020-10-14 23:32:04,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:32:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-14 23:32:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 235. [2020-10-14 23:32:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 23:32:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 272 transitions. [2020-10-14 23:32:04,598 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 272 transitions. Word has length 55 [2020-10-14 23:32:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:04,599 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 272 transitions. [2020-10-14 23:32:04,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:32:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 272 transitions. [2020-10-14 23:32:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 23:32:04,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:04,601 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:04,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:32:04,601 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:04,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2129682852, now seen corresponding path program 17 times [2020-10-14 23:32:04,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:04,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743475571] [2020-10-14 23:32:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:04,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:04,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:05,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:05,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 23:32:05,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:05,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-14 23:32:05,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:05,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:32:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:32:05,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:05,767 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-14 23:32:05,954 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-14 23:32:06,134 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-14 23:32:06,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:06,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:06,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:06,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:06,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:06,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:06,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:06,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:32:06,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743475571] [2020-10-14 23:32:06,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:06,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:32:06,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825174483] [2020-10-14 23:32:06,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:32:06,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:32:06,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:32:06,596 INFO L87 Difference]: Start difference. First operand 235 states and 272 transitions. Second operand 21 states. [2020-10-14 23:32:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:07,927 INFO L93 Difference]: Finished difference Result 261 states and 300 transitions. [2020-10-14 23:32:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:32:07,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-14 23:32:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:07,930 INFO L225 Difference]: With dead ends: 261 [2020-10-14 23:32:07,930 INFO L226 Difference]: Without dead ends: 257 [2020-10-14 23:32:07,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:32:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-14 23:32:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 235. [2020-10-14 23:32:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 23:32:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 272 transitions. [2020-10-14 23:32:07,947 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 272 transitions. Word has length 55 [2020-10-14 23:32:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:07,947 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 272 transitions. [2020-10-14 23:32:07,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:32:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 272 transitions. [2020-10-14 23:32:07,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:32:07,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:07,948 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:07,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:32:07,948 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:07,948 INFO L82 PathProgramCache]: Analyzing trace with hash 10480334, now seen corresponding path program 18 times [2020-10-14 23:32:07,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:07,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911161794] [2020-10-14 23:32:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:07,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:08,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:08,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:08,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:32:08,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:08,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-14 23:32:08,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:08,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:32:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:32:08,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:08,994 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-14 23:32:09,177 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-14 23:32:09,429 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-14 23:32:10,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:10,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:10,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:10,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:10,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:10,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:10,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:10,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:10,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:10,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:10,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:10,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:10,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911161794] [2020-10-14 23:32:10,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:10,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:32:10,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776449778] [2020-10-14 23:32:10,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:32:10,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:32:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:32:10,109 INFO L87 Difference]: Start difference. First operand 235 states and 272 transitions. Second operand 22 states. [2020-10-14 23:32:11,056 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-14 23:32:11,462 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2020-10-14 23:32:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:12,422 INFO L93 Difference]: Finished difference Result 275 states and 314 transitions. [2020-10-14 23:32:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:32:12,422 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-14 23:32:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:12,424 INFO L225 Difference]: With dead ends: 275 [2020-10-14 23:32:12,424 INFO L226 Difference]: Without dead ends: 249 [2020-10-14 23:32:12,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:32:12,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-14 23:32:12,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 200. [2020-10-14 23:32:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-14 23:32:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 232 transitions. [2020-10-14 23:32:12,439 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 232 transitions. Word has length 57 [2020-10-14 23:32:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:12,440 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 232 transitions. [2020-10-14 23:32:12,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:32:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 232 transitions. [2020-10-14 23:32:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:32:12,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:12,441 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:12,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:32:12,441 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2025499201, now seen corresponding path program 19 times [2020-10-14 23:32:12,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:12,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708186598] [2020-10-14 23:32:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:12,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:12,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:13,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:13,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:32:13,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:13,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 995 [2020-10-14 23:32:13,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:13,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:32:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:13,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:32:13,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:14,216 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-14 23:32:14,374 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-14 23:32:14,597 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-14 23:32:14,752 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-14 23:32:14,933 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-14 23:32:15,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:15,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:15,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:15,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:15,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:15,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:32:15,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:15,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:15,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:15,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708186598] [2020-10-14 23:32:15,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:15,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:32:15,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012459827] [2020-10-14 23:32:15,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:32:15,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:15,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:32:15,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:32:15,379 INFO L87 Difference]: Start difference. First operand 200 states and 232 transitions. Second operand 23 states. [2020-10-14 23:32:16,693 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2020-10-14 23:32:16,949 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-10-14 23:32:17,186 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-10-14 23:32:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:17,869 INFO L93 Difference]: Finished difference Result 236 states and 271 transitions. [2020-10-14 23:32:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:32:17,870 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-14 23:32:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:17,872 INFO L225 Difference]: With dead ends: 236 [2020-10-14 23:32:17,872 INFO L226 Difference]: Without dead ends: 232 [2020-10-14 23:32:17,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:32:17,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-14 23:32:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 219. [2020-10-14 23:32:17,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 23:32:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 254 transitions. [2020-10-14 23:32:17,888 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 254 transitions. Word has length 57 [2020-10-14 23:32:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:17,889 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 254 transitions. [2020-10-14 23:32:17,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:32:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 254 transitions. [2020-10-14 23:32:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:32:17,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:17,890 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:17,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:32:17,890 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:17,890 INFO L82 PathProgramCache]: Analyzing trace with hash -199764914, now seen corresponding path program 10 times [2020-10-14 23:32:17,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:17,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995164148] [2020-10-14 23:32:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:17,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:17,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:18,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:18,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:22,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:32:22,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:32:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 23:32:22,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:22,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:32:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:32:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:23,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:23,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:23,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:23,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:23,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:32:23,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995164148] [2020-10-14 23:32:23,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:23,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:32:23,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235282941] [2020-10-14 23:32:23,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:32:23,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:23,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:32:23,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:32:23,697 INFO L87 Difference]: Start difference. First operand 219 states and 254 transitions. Second operand 19 states. [2020-10-14 23:32:24,712 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-14 23:32:24,911 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-14 23:32:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:25,244 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2020-10-14 23:32:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:32:25,245 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-14 23:32:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:25,247 INFO L225 Difference]: With dead ends: 250 [2020-10-14 23:32:25,247 INFO L226 Difference]: Without dead ends: 221 [2020-10-14 23:32:25,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:32:25,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-14 23:32:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2020-10-14 23:32:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 23:32:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 252 transitions. [2020-10-14 23:32:25,264 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 252 transitions. Word has length 57 [2020-10-14 23:32:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:25,265 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 252 transitions. [2020-10-14 23:32:25,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:32:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 252 transitions. [2020-10-14 23:32:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:32:25,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:25,266 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:25,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:32:25,266 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:25,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:25,266 INFO L82 PathProgramCache]: Analyzing trace with hash -999331058, now seen corresponding path program 11 times [2020-10-14 23:32:25,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:25,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485200437] [2020-10-14 23:32:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:25,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:28,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:28,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:32:28,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:32:28,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3583 [2020-10-14 23:32:28,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:28,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:28,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:32:28,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:28,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:32:28,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:29,301 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-14 23:32:29,525 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-14 23:32:29,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:29,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:29,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:29,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:29,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:29,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:29,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:29,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:32:29,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485200437] [2020-10-14 23:32:29,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:29,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:32:29,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731777612] [2020-10-14 23:32:29,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:32:29,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:32:29,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:32:29,931 INFO L87 Difference]: Start difference. First operand 219 states and 252 transitions. Second operand 20 states. [2020-10-14 23:32:30,873 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-14 23:32:31,098 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-14 23:32:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:31,636 INFO L93 Difference]: Finished difference Result 250 states and 284 transitions. [2020-10-14 23:32:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:32:31,637 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-14 23:32:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:31,639 INFO L225 Difference]: With dead ends: 250 [2020-10-14 23:32:31,639 INFO L226 Difference]: Without dead ends: 229 [2020-10-14 23:32:31,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:32:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-14 23:32:31,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 219. [2020-10-14 23:32:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 23:32:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 251 transitions. [2020-10-14 23:32:31,657 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 251 transitions. Word has length 57 [2020-10-14 23:32:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:31,657 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 251 transitions. [2020-10-14 23:32:31,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:32:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 251 transitions. [2020-10-14 23:32:31,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:32:31,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:31,658 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:31,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:32:31,658 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash 396386766, now seen corresponding path program 12 times [2020-10-14 23:32:31,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:31,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146581382] [2020-10-14 23:32:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:31,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:31,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:32,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:33,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:33,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:32:33,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:33,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1925 [2020-10-14 23:32:33,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:33,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:32:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:32:33,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:34,002 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-14 23:32:34,250 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-14 23:32:34,379 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-14 23:32:34,521 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-14 23:32:34,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:34,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:34,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:34,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:34,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:34,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:32:34,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:34,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:32:34,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146581382] [2020-10-14 23:32:34,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:34,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:32:34,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357619999] [2020-10-14 23:32:34,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:32:34,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:34,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:32:34,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:32:34,969 INFO L87 Difference]: Start difference. First operand 219 states and 251 transitions. Second operand 21 states. [2020-10-14 23:32:36,097 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-14 23:32:36,343 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-14 23:32:36,549 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-14 23:32:37,005 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-10-14 23:32:37,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:37,743 INFO L93 Difference]: Finished difference Result 252 states and 285 transitions. [2020-10-14 23:32:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:32:37,748 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-14 23:32:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:37,749 INFO L225 Difference]: With dead ends: 252 [2020-10-14 23:32:37,749 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 23:32:37,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:32:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 23:32:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 219. [2020-10-14 23:32:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 23:32:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 250 transitions. [2020-10-14 23:32:37,767 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 250 transitions. Word has length 57 [2020-10-14 23:32:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:37,767 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 250 transitions. [2020-10-14 23:32:37,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:32:37,767 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 250 transitions. [2020-10-14 23:32:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:32:37,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:37,768 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:37,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:32:37,769 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash 291158158, now seen corresponding path program 8 times [2020-10-14 23:32:37,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:37,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108883914] [2020-10-14 23:32:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:37,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:37,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:38,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:38,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:32:38,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:38,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-14 23:32:38,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:38,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:32:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:32:38,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:39,653 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-14 23:32:39,914 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-14 23:32:40,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:40,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:40,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:40,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:40,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:40,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:40,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:40,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:40,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:40,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108883914] [2020-10-14 23:32:40,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:40,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:32:40,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205062824] [2020-10-14 23:32:40,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:32:40,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:40,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:32:40,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:32:40,452 INFO L87 Difference]: Start difference. First operand 219 states and 250 transitions. Second operand 22 states. [2020-10-14 23:32:41,441 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-14 23:32:41,876 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-14 23:32:42,084 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-14 23:32:42,370 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-14 23:32:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:43,237 INFO L93 Difference]: Finished difference Result 249 states and 281 transitions. [2020-10-14 23:32:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:32:43,238 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-14 23:32:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:43,240 INFO L225 Difference]: With dead ends: 249 [2020-10-14 23:32:43,240 INFO L226 Difference]: Without dead ends: 228 [2020-10-14 23:32:43,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:32:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-14 23:32:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 214. [2020-10-14 23:32:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 23:32:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2020-10-14 23:32:43,252 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 57 [2020-10-14 23:32:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:43,253 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2020-10-14 23:32:43,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:32:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2020-10-14 23:32:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:32:43,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:43,254 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:43,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:32:43,254 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:43,255 INFO L82 PathProgramCache]: Analyzing trace with hash -99405953, now seen corresponding path program 13 times [2020-10-14 23:32:43,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:43,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520702916] [2020-10-14 23:32:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:43,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:43,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:44,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:44,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:32:44,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:44,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 941 [2020-10-14 23:32:44,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:44,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:32:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:32:44,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:44,694 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-14 23:32:44,863 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-14 23:32:45,082 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-14 23:32:45,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:45,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:45,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:45,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:45,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:45,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:45,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:45,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:45,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:45,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:45,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:45,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:45,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520702916] [2020-10-14 23:32:45,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:45,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:32:45,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769636557] [2020-10-14 23:32:45,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:32:45,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:45,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:32:45,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:32:45,647 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand 23 states. [2020-10-14 23:32:46,771 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-14 23:32:46,966 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-14 23:32:47,324 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-14 23:32:47,569 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-14 23:32:47,823 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-14 23:32:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:48,423 INFO L93 Difference]: Finished difference Result 222 states and 253 transitions. [2020-10-14 23:32:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:32:48,424 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-14 23:32:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:48,425 INFO L225 Difference]: With dead ends: 222 [2020-10-14 23:32:48,425 INFO L226 Difference]: Without dead ends: 216 [2020-10-14 23:32:48,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:32:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-14 23:32:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-14 23:32:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-14 23:32:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 246 transitions. [2020-10-14 23:32:48,441 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 246 transitions. Word has length 57 [2020-10-14 23:32:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:48,441 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 246 transitions. [2020-10-14 23:32:48,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:32:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 246 transitions. [2020-10-14 23:32:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 23:32:48,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:48,442 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:48,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:32:48,443 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash -835866854, now seen corresponding path program 20 times [2020-10-14 23:32:48,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:48,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956389696] [2020-10-14 23:32:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:48,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:49,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:49,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 23:32:49,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:49,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-14 23:32:49,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:49,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:49,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:32:49,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:49,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:32:49,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:49,908 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-14 23:32:50,122 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-14 23:32:50,369 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-14 23:32:50,545 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-14 23:32:50,721 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-14 23:32:51,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:51,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:51,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:51,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:51,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:51,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:51,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:51,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:51,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:51,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956389696] [2020-10-14 23:32:51,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:51,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:32:51,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518970599] [2020-10-14 23:32:51,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:32:51,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:51,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:32:51,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:32:51,339 INFO L87 Difference]: Start difference. First operand 216 states and 246 transitions. Second operand 24 states. [2020-10-14 23:32:52,571 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-14 23:32:52,795 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-14 23:32:53,198 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:32:53,443 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:32:53,628 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:32:53,981 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 88 [2020-10-14 23:32:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:55,049 INFO L93 Difference]: Finished difference Result 318 states and 357 transitions. [2020-10-14 23:32:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:32:55,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-14 23:32:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:55,052 INFO L225 Difference]: With dead ends: 318 [2020-10-14 23:32:55,052 INFO L226 Difference]: Without dead ends: 314 [2020-10-14 23:32:55,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:32:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-14 23:32:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 266. [2020-10-14 23:32:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-14 23:32:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 303 transitions. [2020-10-14 23:32:55,075 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 303 transitions. Word has length 59 [2020-10-14 23:32:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:55,076 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 303 transitions. [2020-10-14 23:32:55,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:32:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 303 transitions. [2020-10-14 23:32:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 23:32:55,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:55,077 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:55,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:32:55,077 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:55,078 INFO L82 PathProgramCache]: Analyzing trace with hash -270476902, now seen corresponding path program 9 times [2020-10-14 23:32:55,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:55,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767917536] [2020-10-14 23:32:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:55,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:55,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:56,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 932 [2020-10-14 23:32:56,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:56,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:56,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:32:56,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:56,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:32:56,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:56,290 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-14 23:32:56,565 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-14 23:32:56,743 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-14 23:32:57,019 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-14 23:32:57,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:57,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:57,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:57,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:57,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:57,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:57,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:57,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:57,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:57,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:57,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767917536] [2020-10-14 23:32:57,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:57,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:32:57,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413660793] [2020-10-14 23:32:57,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:32:57,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:32:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:32:57,750 INFO L87 Difference]: Start difference. First operand 266 states and 303 transitions. Second operand 24 states. [2020-10-14 23:32:59,324 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-14 23:32:59,578 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-14 23:33:00,065 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-14 23:33:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:01,112 INFO L93 Difference]: Finished difference Result 305 states and 345 transitions. [2020-10-14 23:33:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:33:01,113 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-14 23:33:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:01,115 INFO L225 Difference]: With dead ends: 305 [2020-10-14 23:33:01,115 INFO L226 Difference]: Without dead ends: 299 [2020-10-14 23:33:01,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:33:01,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-14 23:33:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 275. [2020-10-14 23:33:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-14 23:33:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 314 transitions. [2020-10-14 23:33:01,137 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 314 transitions. Word has length 59 [2020-10-14 23:33:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:01,138 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 314 transitions. [2020-10-14 23:33:01,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:33:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 314 transitions. [2020-10-14 23:33:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 23:33:01,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:01,139 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:01,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:33:01,139 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:01,140 INFO L82 PathProgramCache]: Analyzing trace with hash -60482123, now seen corresponding path program 21 times [2020-10-14 23:33:01,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:01,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418516589] [2020-10-14 23:33:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:01,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:01,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:02,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:02,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 23:33:02,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:33:02,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-10-14 23:33:02,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:02,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:02,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:33:02,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:33:02,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:33:02,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:02,606 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-14 23:33:02,948 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-14 23:33:03,208 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:33:03,413 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-14 23:33:03,614 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-14 23:33:04,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:04,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:04,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:04,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:04,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:04,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:04,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:04,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:04,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:04,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:04,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:04,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:04,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418516589] [2020-10-14 23:33:04,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:04,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:33:04,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714103695] [2020-10-14 23:33:04,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:33:04,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:33:04,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:33:04,336 INFO L87 Difference]: Start difference. First operand 275 states and 314 transitions. Second operand 25 states. [2020-10-14 23:33:05,809 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:33:06,287 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:33:06,525 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:33:06,871 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-14 23:33:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:08,177 INFO L93 Difference]: Finished difference Result 341 states and 383 transitions. [2020-10-14 23:33:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:33:08,178 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-14 23:33:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:08,179 INFO L225 Difference]: With dead ends: 341 [2020-10-14 23:33:08,180 INFO L226 Difference]: Without dead ends: 337 [2020-10-14 23:33:08,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:33:08,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-14 23:33:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 293. [2020-10-14 23:33:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-14 23:33:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 333 transitions. [2020-10-14 23:33:08,209 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 333 transitions. Word has length 61 [2020-10-14 23:33:08,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:08,209 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 333 transitions. [2020-10-14 23:33:08,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:33:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 333 transitions. [2020-10-14 23:33:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:33:08,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:08,211 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:08,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:33:08,211 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2054902160, now seen corresponding path program 22 times [2020-10-14 23:33:08,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:08,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215431064] [2020-10-14 23:33:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:08,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:08,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:09,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:09,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:33:09,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:33:09,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-14 23:33:09,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:09,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:09,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:33:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:33:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:33:09,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:09,814 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-14 23:33:10,026 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-14 23:33:10,425 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2020-10-14 23:33:10,559 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-14 23:33:10,704 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-14 23:33:11,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:11,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:11,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:11,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:11,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:11,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:11,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:11,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:11,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:11,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:11,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:11,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:11,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215431064] [2020-10-14 23:33:11,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:11,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:33:11,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62838204] [2020-10-14 23:33:11,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:33:11,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:11,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:33:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:33:11,363 INFO L87 Difference]: Start difference. First operand 293 states and 333 transitions. Second operand 25 states. [2020-10-14 23:33:12,696 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-14 23:33:12,910 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:33:13,260 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-14 23:33:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:14,545 INFO L93 Difference]: Finished difference Result 343 states and 385 transitions. [2020-10-14 23:33:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:33:14,546 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-14 23:33:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:14,548 INFO L225 Difference]: With dead ends: 343 [2020-10-14 23:33:14,548 INFO L226 Difference]: Without dead ends: 308 [2020-10-14 23:33:14,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:33:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-14 23:33:14,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 249. [2020-10-14 23:33:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-14 23:33:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 283 transitions. [2020-10-14 23:33:14,570 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 283 transitions. Word has length 63 [2020-10-14 23:33:14,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:14,570 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 283 transitions. [2020-10-14 23:33:14,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:33:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 283 transitions. [2020-10-14 23:33:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:33:14,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:14,571 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:14,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:33:14,572 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:14,572 INFO L82 PathProgramCache]: Analyzing trace with hash -311311295, now seen corresponding path program 23 times [2020-10-14 23:33:14,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:14,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250285170] [2020-10-14 23:33:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:14,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:14,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:15,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:15,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:33:15,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:33:15,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1317 [2020-10-14 23:33:15,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:15,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:33:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:33:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:33:15,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:16,271 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-14 23:33:16,403 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-14 23:33:16,606 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-14 23:33:16,913 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-14 23:33:17,222 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-14 23:33:17,397 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-10-14 23:33:17,574 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-14 23:33:18,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:18,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:18,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:18,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:18,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:18,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:18,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:18,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:18,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:18,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:18,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:18,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:18,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250285170] [2020-10-14 23:33:18,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:18,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:33:18,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593804121] [2020-10-14 23:33:18,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:33:18,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:33:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:33:18,240 INFO L87 Difference]: Start difference. First operand 249 states and 283 transitions. Second operand 26 states. [2020-10-14 23:33:20,204 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:33:20,430 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:33:20,844 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:33:21,079 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:33:21,243 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 23:33:21,673 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 100 [2020-10-14 23:33:22,000 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2020-10-14 23:33:22,303 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2020-10-14 23:33:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:23,447 INFO L93 Difference]: Finished difference Result 366 states and 410 transitions. [2020-10-14 23:33:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:33:23,447 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-10-14 23:33:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:23,449 INFO L225 Difference]: With dead ends: 366 [2020-10-14 23:33:23,449 INFO L226 Difference]: Without dead ends: 362 [2020-10-14 23:33:23,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=208, Invalid=2342, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:33:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-14 23:33:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 301. [2020-10-14 23:33:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-14 23:33:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2020-10-14 23:33:23,475 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 63 [2020-10-14 23:33:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:23,475 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2020-10-14 23:33:23,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:33:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2020-10-14 23:33:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:33:23,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:23,476 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:23,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:33:23,477 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:23,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1919198256, now seen corresponding path program 14 times [2020-10-14 23:33:23,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:23,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893737997] [2020-10-14 23:33:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:23,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:23,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:24,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:25,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:28,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:28,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:33:28,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:33:28,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4802 [2020-10-14 23:33:28,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:28,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:28,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:33:28,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:33:28,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:33:28,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:28,620 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-14 23:33:28,749 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-14 23:33:28,925 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-14 23:33:29,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:29,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:29,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:29,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:29,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:29,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:33:29,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:29,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:29,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:29,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:29,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:29,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:33:29,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893737997] [2020-10-14 23:33:29,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:29,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:33:29,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858855077] [2020-10-14 23:33:29,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:33:29,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:29,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:33:29,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:33:29,603 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand 22 states. [2020-10-14 23:33:30,917 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-14 23:33:31,188 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2020-10-14 23:33:31,455 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 77 [2020-10-14 23:33:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:32,025 INFO L93 Difference]: Finished difference Result 358 states and 404 transitions. [2020-10-14 23:33:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:33:32,026 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-14 23:33:32,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:32,028 INFO L225 Difference]: With dead ends: 358 [2020-10-14 23:33:32,028 INFO L226 Difference]: Without dead ends: 327 [2020-10-14 23:33:32,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:33:32,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-14 23:33:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 303. [2020-10-14 23:33:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-14 23:33:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 343 transitions. [2020-10-14 23:33:32,058 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 343 transitions. Word has length 63 [2020-10-14 23:33:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:32,058 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 343 transitions. [2020-10-14 23:33:32,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:33:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 343 transitions. [2020-10-14 23:33:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:33:32,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:32,059 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:32,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:33:32,060 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1503116656, now seen corresponding path program 15 times [2020-10-14 23:33:32,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:32,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327034792] [2020-10-14 23:33:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:32,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:32,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:32,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:33,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:36,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:36,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:33:36,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:33:36,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3948 [2020-10-14 23:33:36,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:36,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:36,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:33:36,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:33:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:33:36,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:36,409 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-14 23:33:36,626 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-14 23:33:36,949 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-10-14 23:33:37,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:37,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:37,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:37,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:37,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:37,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:37,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:37,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:37,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:37,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:37,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:37,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:33:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:33:37,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327034792] [2020-10-14 23:33:37,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:37,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:33:37,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723419453] [2020-10-14 23:33:37,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:33:37,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:37,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:33:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:33:37,522 INFO L87 Difference]: Start difference. First operand 303 states and 343 transitions. Second operand 23 states. [2020-10-14 23:33:39,182 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:33:39,399 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:33:39,881 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2020-10-14 23:33:40,160 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2020-10-14 23:33:40,416 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-14 23:33:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:41,080 INFO L93 Difference]: Finished difference Result 338 states and 379 transitions. [2020-10-14 23:33:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:33:41,081 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-10-14 23:33:41,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:41,083 INFO L225 Difference]: With dead ends: 338 [2020-10-14 23:33:41,083 INFO L226 Difference]: Without dead ends: 315 [2020-10-14 23:33:41,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:33:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-14 23:33:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 303. [2020-10-14 23:33:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-14 23:33:41,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 342 transitions. [2020-10-14 23:33:41,111 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 342 transitions. Word has length 63 [2020-10-14 23:33:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:41,111 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 342 transitions. [2020-10-14 23:33:41,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:33:41,112 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 342 transitions. [2020-10-14 23:33:41,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:33:41,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:41,113 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:41,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:33:41,113 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:41,113 INFO L82 PathProgramCache]: Analyzing trace with hash -248084144, now seen corresponding path program 16 times [2020-10-14 23:33:41,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:41,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167349790] [2020-10-14 23:33:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:41,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:41,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:41,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:44,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:44,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:33:44,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:33:44,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3313 [2020-10-14 23:33:44,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:44,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:44,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:33:44,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:33:44,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:33:44,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:44,884 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-14 23:33:45,099 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-14 23:33:45,415 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-14 23:33:45,583 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-14 23:33:45,767 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-14 23:33:46,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:46,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:46,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:46,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:46,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:46,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:46,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:46,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:33:46,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167349790] [2020-10-14 23:33:46,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:46,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:33:46,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27216919] [2020-10-14 23:33:46,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:33:46,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:33:46,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:33:46,407 INFO L87 Difference]: Start difference. First operand 303 states and 342 transitions. Second operand 24 states. [2020-10-14 23:33:48,105 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:33:48,327 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:33:48,751 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:33:49,014 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:33:49,207 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:33:49,573 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 88 [2020-10-14 23:33:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:50,468 INFO L93 Difference]: Finished difference Result 338 states and 378 transitions. [2020-10-14 23:33:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:33:50,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2020-10-14 23:33:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:50,471 INFO L225 Difference]: With dead ends: 338 [2020-10-14 23:33:50,471 INFO L226 Difference]: Without dead ends: 315 [2020-10-14 23:33:50,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:33:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-14 23:33:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 303. [2020-10-14 23:33:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-14 23:33:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 341 transitions. [2020-10-14 23:33:50,493 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 341 transitions. Word has length 63 [2020-10-14 23:33:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:50,493 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 341 transitions. [2020-10-14 23:33:50,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:33:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 341 transitions. [2020-10-14 23:33:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:33:50,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:50,494 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:50,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:33:50,494 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1706438672, now seen corresponding path program 10 times [2020-10-14 23:33:50,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:50,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417375838] [2020-10-14 23:33:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:50,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:50,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:52,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:52,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:33:52,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:33:52,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1611 [2020-10-14 23:33:52,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:52,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:33:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:33:52,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:33:52,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:52,810 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-14 23:33:53,130 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-14 23:33:53,322 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-14 23:33:53,499 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-14 23:33:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:54,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:54,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:54,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:54,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:54,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:54,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:54,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:54,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:54,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:54,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:54,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:33:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:54,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417375838] [2020-10-14 23:33:54,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:54,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:33:54,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638723932] [2020-10-14 23:33:54,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:33:54,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:54,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:33:54,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:33:54,216 INFO L87 Difference]: Start difference. First operand 303 states and 341 transitions. Second operand 25 states. [2020-10-14 23:33:55,711 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:33:56,203 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:33:56,455 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:33:56,788 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-14 23:33:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:57,819 INFO L93 Difference]: Finished difference Result 335 states and 374 transitions. [2020-10-14 23:33:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:33:57,819 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-14 23:33:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:57,821 INFO L225 Difference]: With dead ends: 335 [2020-10-14 23:33:57,821 INFO L226 Difference]: Without dead ends: 312 [2020-10-14 23:33:57,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:33:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-14 23:33:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 298. [2020-10-14 23:33:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-14 23:33:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 335 transitions. [2020-10-14 23:33:57,845 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 335 transitions. Word has length 63 [2020-10-14 23:33:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:57,845 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 335 transitions. [2020-10-14 23:33:57,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:33:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 335 transitions. [2020-10-14 23:33:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:33:57,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:57,846 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:57,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:33:57,847 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:57,847 INFO L82 PathProgramCache]: Analyzing trace with hash 36482753, now seen corresponding path program 17 times [2020-10-14 23:33:57,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:57,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335544913] [2020-10-14 23:33:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:57,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:57,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:59,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:59,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:33:59,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:33:59,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1401 [2020-10-14 23:33:59,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:59,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:59,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:33:59,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:33:59,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:33:59,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:59,896 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-14 23:34:00,156 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-14 23:34:00,471 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-14 23:34:01,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:01,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:01,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:01,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:01,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:01,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:34:01,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:01,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:01,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:01,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:01,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:01,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:01,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335544913] [2020-10-14 23:34:01,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:01,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:34:01,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118907298] [2020-10-14 23:34:01,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:34:01,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:34:01,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:34:01,211 INFO L87 Difference]: Start difference. First operand 298 states and 335 transitions. Second operand 26 states. [2020-10-14 23:34:03,016 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 91 [2020-10-14 23:34:03,352 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 94 [2020-10-14 23:34:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:04,127 INFO L93 Difference]: Finished difference Result 331 states and 370 transitions. [2020-10-14 23:34:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:34:04,128 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-10-14 23:34:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:04,130 INFO L225 Difference]: With dead ends: 331 [2020-10-14 23:34:04,130 INFO L226 Difference]: Without dead ends: 325 [2020-10-14 23:34:04,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:34:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-14 23:34:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 305. [2020-10-14 23:34:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-14 23:34:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 343 transitions. [2020-10-14 23:34:04,150 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 343 transitions. Word has length 63 [2020-10-14 23:34:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:04,151 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 343 transitions. [2020-10-14 23:34:04,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:34:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 343 transitions. [2020-10-14 23:34:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 23:34:04,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:04,151 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:04,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 23:34:04,152 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:04,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1526236444, now seen corresponding path program 24 times [2020-10-14 23:34:04,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:04,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576125870] [2020-10-14 23:34:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:04,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:04,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:05,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:05,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 23:34:05,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:34:05,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-14 23:34:05,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:05,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:05,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:34:05,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:34:05,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 23:34:05,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:06,097 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-14 23:34:06,244 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-14 23:34:06,461 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-14 23:34:06,599 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-14 23:34:06,816 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-14 23:34:06,989 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-14 23:34:07,197 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-14 23:34:07,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:07,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:07,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:07,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:07,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:07,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:07,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:07,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:07,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:07,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:07,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:07,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:08,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576125870] [2020-10-14 23:34:08,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:08,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:34:08,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355422509] [2020-10-14 23:34:08,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:34:08,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:08,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:34:08,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:34:08,001 INFO L87 Difference]: Start difference. First operand 305 states and 343 transitions. Second operand 27 states. [2020-10-14 23:34:09,364 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-14 23:34:09,757 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:34:09,982 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:34:10,159 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-14 23:34:10,455 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:34:10,749 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:34:10,948 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:34:11,267 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:34:11,549 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 23:34:11,749 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 23:34:12,221 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2020-10-14 23:34:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:13,609 INFO L93 Difference]: Finished difference Result 380 states and 421 transitions. [2020-10-14 23:34:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:34:13,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2020-10-14 23:34:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:13,612 INFO L225 Difference]: With dead ends: 380 [2020-10-14 23:34:13,612 INFO L226 Difference]: Without dead ends: 376 [2020-10-14 23:34:13,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=204, Invalid=2448, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:34:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-14 23:34:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 332. [2020-10-14 23:34:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-14 23:34:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 372 transitions. [2020-10-14 23:34:13,640 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 372 transitions. Word has length 65 [2020-10-14 23:34:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:13,640 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 372 transitions. [2020-10-14 23:34:13,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:34:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 372 transitions. [2020-10-14 23:34:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 23:34:13,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:13,641 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:13,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 23:34:13,642 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1668341852, now seen corresponding path program 11 times [2020-10-14 23:34:13,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:13,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750165106] [2020-10-14 23:34:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:13,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:15,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:15,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 23:34:15,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:34:15,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1501 [2020-10-14 23:34:15,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:15,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:15,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:34:15,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:34:15,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:34:15,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:15,805 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58