/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:20:43,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:20:43,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:20:43,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:20:43,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:20:43,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:20:43,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:20:43,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:20:43,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:20:43,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:20:43,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:20:43,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:20:43,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:20:43,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:20:43,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:20:43,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:20:43,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:20:43,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:20:43,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:20:43,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:20:43,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:20:43,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:20:43,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:20:43,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:20:43,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:20:43,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:20:43,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:20:43,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:20:43,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:20:43,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:20:43,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:20:43,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:20:43,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:20:43,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:20:43,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:20:43,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:20:43,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:20:43,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:20:43,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:20:43,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:20:43,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:20:43,788 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 [2020-10-29 09:20:43,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:20:43,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:20:43,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:20:43,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:20:43,841 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:20:43,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:20:43,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:20:43,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:20:43,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:20:43,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:20:43,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:20:43,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:20:43,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:20:43,844 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:20:43,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:20:43,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:20:43,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:20:43,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:20:43,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:20:43,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:20:43,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:20:43,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:20:43,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:20:43,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:20:43,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:20:43,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:20:43,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:20:43,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:20:43,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:20:43,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:20:44,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:20:44,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:20:44,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:20:44,322 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:20:44,323 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:20:44,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-29 09:20:44,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9f94ce8b/bdc61740538944f083784e79e499f920/FLAG9c03b0d3f [2020-10-29 09:20:45,188 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:20:45,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-29 09:20:45,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9f94ce8b/bdc61740538944f083784e79e499f920/FLAG9c03b0d3f [2020-10-29 09:20:45,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9f94ce8b/bdc61740538944f083784e79e499f920 [2020-10-29 09:20:45,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:20:45,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:20:45,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:20:45,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:20:45,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:20:45,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:20:45" (1/1) ... [2020-10-29 09:20:45,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29392e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:45, skipping insertion in model container [2020-10-29 09:20:45,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:20:45" (1/1) ... [2020-10-29 09:20:45,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:20:45,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:20:45,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:20:45,932 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:20:45,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:20:46,055 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:20:46,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46 WrapperNode [2020-10-29 09:20:46,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:20:46,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:20:46,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:20:46,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:20:46,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46" (1/1) ... [2020-10-29 09:20:46,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46" (1/1) ... [2020-10-29 09:20:46,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46" (1/1) ... [2020-10-29 09:20:46,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46" (1/1) ... [2020-10-29 09:20:46,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46" (1/1) ... [2020-10-29 09:20:46,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46" (1/1) ... [2020-10-29 09:20:46,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46" (1/1) ... [2020-10-29 09:20:46,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:20:46,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:20:46,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:20:46,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:20:46,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46" (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 [2020-10-29 09:20:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:20:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:20:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:20:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:20:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:20:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-29 09:20:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:20:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:20:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:20:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:20:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:20:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:20:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:20:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:20:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:20:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:20:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:20:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:20:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:20:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:20:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:20:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:20:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:20:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:20:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:20:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:20:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:20:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:20:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:20:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:20:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:20:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:20:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:20:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:20:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:20:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:20:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:20:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:20:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:20:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:20:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:20:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:20:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:20:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:20:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:20:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:20:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:20:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:20:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:20:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:20:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:20:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:20:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:20:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:20:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:20:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:20:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:20:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:20:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:20:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:20:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:20:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:20:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:20:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:20:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:20:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:20:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:20:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:20:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:20:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:20:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:20:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:20:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:20:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:20:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:20:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:20:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:20:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:20:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:20:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:20:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:20:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:20:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:20:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:20:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:20:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:20:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:20:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:20:46,249 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:20:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:20:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:20:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:20:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:20:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:20:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:20:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:20:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:20:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:20:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:20:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:20:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:20:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:20:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:20:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:20:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:20:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:20:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:20:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:20:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:20:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:20:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:20:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:20:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:20:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:20:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:20:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:20:46,255 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:20:46,255 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:20:46,255 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-29 09:20:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:20:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:20:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:20:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:20:46,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:20:46,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:20:46,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:20:46,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:20:46,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:20:46,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:20:46,689 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-29 09:20:46,870 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:20:46,870 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:20:46,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:20:46 BoogieIcfgContainer [2020-10-29 09:20:46,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:20:46,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:20:46,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:20:46,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:20:46,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:20:45" (1/3) ... [2020-10-29 09:20:46,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f11e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:20:46, skipping insertion in model container [2020-10-29 09:20:46,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:20:46" (2/3) ... [2020-10-29 09:20:46,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f11e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:20:46, skipping insertion in model container [2020-10-29 09:20:46,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:20:46" (3/3) ... [2020-10-29 09:20:46,881 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_search_value-2.i [2020-10-29 09:20:46,892 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:20:46,896 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:20:46,911 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:20:46,939 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:20:46,939 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:20:46,939 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:20:46,939 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:20:46,940 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:20:46,940 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:20:46,940 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:20:46,940 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:20:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-29 09:20:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:20:46,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:46,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:20:46,964 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:46,971 INFO L82 PathProgramCache]: Analyzing trace with hash -297690078, now seen corresponding path program 1 times [2020-10-29 09:20:46,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:46,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134004171] [2020-10-29 09:20:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:47,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:47,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:47,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:47,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:47,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:20:47,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:20:47,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-29 09:20:47,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:47,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:47,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:20:47,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:20:47,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:20:47,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:20:47,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:47,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:47,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:47,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:47,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:20:47,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:47,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:47,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:47,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:47,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:47,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:20:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:47,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134004171] [2020-10-29 09:20:47,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:20:47,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:20:47,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756666019] [2020-10-29 09:20:47,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:20:47,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:48,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:20:48,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:20:48,025 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2020-10-29 09:20:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:48,198 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-10-29 09:20:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:20:48,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-29 09:20:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:48,210 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:20:48,210 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:20:48,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:20:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:20:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-10-29 09:20:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:20:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-29 09:20:48,259 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2020-10-29 09:20:48,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:48,259 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-29 09:20:48,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:20:48,260 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-29 09:20:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:20:48,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:48,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:20:48,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:20:48,262 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1285728602, now seen corresponding path program 1 times [2020-10-29 09:20:48,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:48,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550212689] [2020-10-29 09:20:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:48,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:48,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:48,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:48,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:48,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:48,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:49,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:49,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:20:49,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:20:49,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-29 09:20:49,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:49,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:49,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:20:49,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:20:49,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:20:49,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:20:49,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:49,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:49,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:49,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:20:49,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:49,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:20:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:49,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550212689] [2020-10-29 09:20:49,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:20:49,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:20:49,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567286268] [2020-10-29 09:20:49,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:20:49,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:20:49,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:20:49,813 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-29 09:20:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:49,972 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-10-29 09:20:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:20:49,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-29 09:20:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:49,974 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:20:49,974 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:20:49,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:20:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:20:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-29 09:20:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:20:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-29 09:20:49,984 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 22 [2020-10-29 09:20:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:49,985 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-29 09:20:49,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:20:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-29 09:20:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:20:49,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:49,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:20:49,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:20:49,987 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:49,988 INFO L82 PathProgramCache]: Analyzing trace with hash -605670232, now seen corresponding path program 1 times [2020-10-29 09:20:49,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:49,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404026556] [2020-10-29 09:20:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:50,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:50,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:20:50,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:20:50,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-29 09:20:50,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:50,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:50,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:20:50,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:20:50,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:20:50,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:50,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:50,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:50,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:50,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:50,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:20:50,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:50,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:50,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:20:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404026556] [2020-10-29 09:20:50,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:20:50,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:20:50,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252999899] [2020-10-29 09:20:50,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:20:50,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:50,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:20:50,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:20:50,348 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2020-10-29 09:20:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:50,498 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-10-29 09:20:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:20:50,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-29 09:20:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:50,500 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:20:50,500 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:20:50,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:20:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:20:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-29 09:20:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:20:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-29 09:20:50,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2020-10-29 09:20:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:50,510 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-29 09:20:50,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:20:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-29 09:20:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:20:50,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:50,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:20:50,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:20:50,511 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:50,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:50,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1169337130, now seen corresponding path program 1 times [2020-10-29 09:20:50,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:50,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380496914] [2020-10-29 09:20:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:50,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:50,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:20:50,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:20:50,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-29 09:20:50,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:50,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:50,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:20:50,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:20:50,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:20:50,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:20:50,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:50,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:50,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:50,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:50,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:20:50,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:50,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:50,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:50,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:50,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:50,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:20:50,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380496914] [2020-10-29 09:20:50,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:20:50,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:20:50,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667667883] [2020-10-29 09:20:50,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:20:50,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:50,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:20:50,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:20:50,689 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 5 states. [2020-10-29 09:20:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:50,806 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-29 09:20:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:20:50,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-29 09:20:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:50,807 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:20:50,807 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:20:50,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:20:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:20:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-29 09:20:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:20:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-29 09:20:50,814 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 22 [2020-10-29 09:20:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:50,815 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-29 09:20:50,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:20:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-29 09:20:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:20:50,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:50,816 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] [2020-10-29 09:20:50,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:20:50,817 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:50,817 INFO L82 PathProgramCache]: Analyzing trace with hash -778698823, now seen corresponding path program 1 times [2020-10-29 09:20:50,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:50,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138076218] [2020-10-29 09:20:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:50,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:50,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:51,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:51,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:51,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:52,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:54,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:54,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:20:54,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:20:54,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3935 [2020-10-29 09:20:54,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:54,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:54,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:20:54,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:20:54,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:20:54,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:54,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:54,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:54,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:54,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:54,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:54,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:20:54,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:54,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:54,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:54,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:54,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:54,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:20:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:54,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138076218] [2020-10-29 09:20:54,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:54,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:20:54,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347882635] [2020-10-29 09:20:54,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:20:54,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:20:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:20:54,927 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 9 states. [2020-10-29 09:20:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:55,204 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-29 09:20:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:20:55,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-29 09:20:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:55,206 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:20:55,206 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:20:55,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:20:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:20:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-29 09:20:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:20:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-29 09:20:55,214 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2020-10-29 09:20:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:55,215 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-29 09:20:55,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:20:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-29 09:20:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:20:55,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:55,216 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] [2020-10-29 09:20:55,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:20:55,217 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash -794343864, now seen corresponding path program 2 times [2020-10-29 09:20:55,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:55,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815805683] [2020-10-29 09:20:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:55,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:55,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:55,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:55,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:56,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:59,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:59,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:20:59,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:20:59,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4108 [2020-10-29 09:20:59,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:59,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:20:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:20:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:20:59,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:59,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:59,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:59,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:59,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:59,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:59,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:20:59,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:59,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:59,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:59,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:20:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:59,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815805683] [2020-10-29 09:20:59,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:59,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:20:59,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105075654] [2020-10-29 09:20:59,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:20:59,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:20:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:20:59,574 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 11 states. [2020-10-29 09:20:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:59,788 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-29 09:20:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:20:59,789 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-29 09:20:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:59,790 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:20:59,790 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:20:59,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:20:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:20:59,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-29 09:20:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:20:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-29 09:20:59,804 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 32 [2020-10-29 09:20:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:59,806 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-29 09:20:59,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:20:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-29 09:20:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:20:59,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:59,811 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] [2020-10-29 09:20:59,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:20:59,811 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash 980663498, now seen corresponding path program 1 times [2020-10-29 09:20:59,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:59,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690927761] [2020-10-29 09:20:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:59,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:00,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:01,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:01,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:21:01,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:21:01,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1569 [2020-10-29 09:21:01,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:01,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:21:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:21:01,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:21:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:01,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:01,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:01,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:01,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:01,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:21:01,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:01,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:01,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:01,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:01,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:01,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:01,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690927761] [2020-10-29 09:21:01,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:01,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:21:01,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833351754] [2020-10-29 09:21:01,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:21:01,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:01,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:21:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:21:01,586 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 11 states. [2020-10-29 09:21:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:01,877 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-29 09:21:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:21:01,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-29 09:21:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:01,880 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:21:01,881 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:21:01,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:21:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:21:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-10-29 09:21:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:21:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-29 09:21:01,892 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 32 [2020-10-29 09:21:01,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:01,892 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-29 09:21:01,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:21:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-29 09:21:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:21:01,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:01,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:01,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:21:01,895 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:01,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1902772162, now seen corresponding path program 1 times [2020-10-29 09:21:01,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:01,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519496984] [2020-10-29 09:21:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:01,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:01,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:01,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:02,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:02,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:02,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:03,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:05,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:05,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:21:05,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:21:05,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3665 [2020-10-29 09:21:05,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:05,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:05,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:21:05,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:05,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:21:05,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:21:05,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:05,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:05,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:05,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:05,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:05,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:21:05,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:05,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:05,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:05,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:05,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:05,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:05,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519496984] [2020-10-29 09:21:05,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:05,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:21:05,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946978338] [2020-10-29 09:21:05,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:21:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:05,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:21:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:21:05,827 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 10 states. [2020-10-29 09:21:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:06,211 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-29 09:21:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:21:06,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-29 09:21:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:06,214 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:21:06,214 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:21:06,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:21:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:21:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-29 09:21:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:21:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-29 09:21:06,223 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2020-10-29 09:21:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:06,223 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-29 09:21:06,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:21:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-29 09:21:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:21:06,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:06,225 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 09:21:06,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:21:06,225 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:06,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1222713792, now seen corresponding path program 1 times [2020-10-29 09:21:06,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:06,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995145071] [2020-10-29 09:21:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:06,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:06,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:06,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:06,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:07,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:07,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:21:07,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:21:07,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1369 [2020-10-29 09:21:07,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:07,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:07,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:21:07,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:07,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:21:07,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:21:07,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:07,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:07,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:07,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:07,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:07,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:21:07,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:07,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:07,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:21:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:07,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995145071] [2020-10-29 09:21:07,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:07,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:21:07,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234126851] [2020-10-29 09:21:07,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:21:07,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:07,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:21:07,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:21:07,753 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-10-29 09:21:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:08,039 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-29 09:21:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:21:08,040 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-29 09:21:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:08,041 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:21:08,041 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:21:08,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:21:08,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:21:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-29 09:21:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:21:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-29 09:21:08,048 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 32 [2020-10-29 09:21:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:08,049 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-29 09:21:08,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:21:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-29 09:21:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:21:08,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:08,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:08,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:21:08,051 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash 552293570, now seen corresponding path program 1 times [2020-10-29 09:21:08,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:08,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892474692] [2020-10-29 09:21:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:08,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:08,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:08,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:08,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:21:08,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:21:08,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-29 09:21:08,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:08,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:08,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:21:08,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:21:08,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:08,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:08,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:08,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:08,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:08,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:21:08,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:08,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:08,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:08,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:08,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:08,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:21:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:21:08,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892474692] [2020-10-29 09:21:08,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:08,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:21:08,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570447566] [2020-10-29 09:21:08,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:21:08,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:08,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:21:08,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:21:08,485 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 9 states. [2020-10-29 09:21:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:08,715 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-29 09:21:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:21:08,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-29 09:21:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:08,716 INFO L225 Difference]: With dead ends: 69 [2020-10-29 09:21:08,716 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:21:08,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:21:08,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:21:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-29 09:21:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:21:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-29 09:21:08,724 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 32 [2020-10-29 09:21:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:08,724 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-29 09:21:08,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:21:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-29 09:21:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:21:08,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:08,725 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:08,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:21:08,726 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash -458823680, now seen corresponding path program 1 times [2020-10-29 09:21:08,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:08,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292856541] [2020-10-29 09:21:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:08,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:08,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:08,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:21:08,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:08,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-29 09:21:08,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:08,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:21:08,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:21:08,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:21:08,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:21:08,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:08,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:08,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:08,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:08,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:08,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:21:08,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:08,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:08,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:08,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:08,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:08,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 09:21:08,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292856541] [2020-10-29 09:21:08,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:08,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:21:08,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427694143] [2020-10-29 09:21:08,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:21:08,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:08,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:21:08,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:21:08,879 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 6 states. [2020-10-29 09:21:08,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:08,977 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-29 09:21:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:21:08,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-29 09:21:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:08,978 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:21:08,978 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:21:08,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:21:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:21:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-29 09:21:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:21:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-29 09:21:08,989 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2020-10-29 09:21:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:08,989 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-29 09:21:08,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:21:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-29 09:21:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:21:08,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:08,990 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:08,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:21:08,991 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:08,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1184531697, now seen corresponding path program 2 times [2020-10-29 09:21:08,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:08,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50668658] [2020-10-29 09:21:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:09,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:09,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:09,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:09,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:09,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:09,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:10,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:10,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:10,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:14,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:14,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:21:14,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:21:14,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 09:21:14,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:14,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:21:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:21:14,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:14,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:14,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:14,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:14,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:14,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:14,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:21:14,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:14,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:14,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:14,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50668658] [2020-10-29 09:21:14,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:14,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:21:14,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125962122] [2020-10-29 09:21:14,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:21:14,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:14,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:21:14,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:21:14,440 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 12 states. [2020-10-29 09:21:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:14,965 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-10-29 09:21:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:21:14,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-29 09:21:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:14,967 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:21:14,967 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 09:21:14,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:21:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 09:21:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-10-29 09:21:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:21:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-29 09:21:14,978 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 37 [2020-10-29 09:21:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:14,979 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-29 09:21:14,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:21:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-29 09:21:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:21:14,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:14,981 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:14,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:21:14,981 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1948837154, now seen corresponding path program 3 times [2020-10-29 09:21:14,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:14,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715945255] [2020-10-29 09:21:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:15,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:15,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:15,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:15,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:15,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:16,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:16,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:16,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:20,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:20,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:21:20,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:21:20,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 09:21:20,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:20,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:21:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:21:20,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:20,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:20,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:20,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:20,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:20,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:20,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:21:20,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:20,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:20,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:21:20,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715945255] [2020-10-29 09:21:20,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:20,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:21:20,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325249309] [2020-10-29 09:21:20,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:21:20,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:21:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:21:20,340 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 13 states. [2020-10-29 09:21:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:20,929 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-29 09:21:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:21:20,930 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-29 09:21:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:20,930 INFO L225 Difference]: With dead ends: 79 [2020-10-29 09:21:20,930 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:21:20,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:21:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:21:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-29 09:21:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:21:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-29 09:21:20,947 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 42 [2020-10-29 09:21:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:20,947 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-29 09:21:20,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:21:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-29 09:21:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:21:20,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:20,951 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 09:21:20,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:21:20,952 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:20,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:20,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1335012892, now seen corresponding path program 2 times [2020-10-29 09:21:20,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:20,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220443730] [2020-10-29 09:21:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:20,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:21,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:21,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:21,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:21,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:21,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:24,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:24,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:21:24,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:21:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3457 [2020-10-29 09:21:24,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:24,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:21:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:24,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:21:24,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:24,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:24,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:24,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:24,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:24,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:24,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:21:24,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:24,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:24,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:24,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:24,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:24,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:24,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220443730] [2020-10-29 09:21:24,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:24,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:21:24,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273034767] [2020-10-29 09:21:24,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:21:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:24,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:21:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:21:24,953 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 14 states. [2020-10-29 09:21:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:25,443 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-29 09:21:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:21:25,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-29 09:21:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:25,444 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:21:25,445 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:21:25,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:21:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:21:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-29 09:21:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:21:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-10-29 09:21:25,455 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 42 [2020-10-29 09:21:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:25,457 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-10-29 09:21:25,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:21:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-10-29 09:21:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:21:25,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:25,459 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:25,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:21:25,459 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:25,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2015071262, now seen corresponding path program 1 times [2020-10-29 09:21:25,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:25,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859440149] [2020-10-29 09:21:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:25,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:25,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:25,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:26,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:26,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:21:26,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:21:26,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-29 09:21:26,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:26,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:26,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:21:26,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:26,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:21:26,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:27,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:27,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:27,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:27,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:27,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:21:27,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:27,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:27,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:27,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859440149] [2020-10-29 09:21:27,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:27,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:21:27,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833462102] [2020-10-29 09:21:27,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:21:27,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:27,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:21:27,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:21:27,379 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 14 states. [2020-10-29 09:21:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:28,058 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2020-10-29 09:21:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:21:28,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-29 09:21:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:28,060 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:21:28,060 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:21:28,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:21:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:21:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2020-10-29 09:21:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:21:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-29 09:21:28,068 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 42 [2020-10-29 09:21:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:28,068 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-29 09:21:28,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:21:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-29 09:21:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:21:28,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:28,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:28,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:21:28,069 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:28,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:28,070 INFO L82 PathProgramCache]: Analyzing trace with hash -156682582, now seen corresponding path program 3 times [2020-10-29 09:21:28,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:28,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091874740] [2020-10-29 09:21:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:28,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:28,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:28,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:28,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:30,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:30,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:21:30,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:21:30,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2606 [2020-10-29 09:21:30,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:30,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:21:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:21:30,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:31,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:31,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:31,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:31,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:31,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:31,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:21:31,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:31,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:31,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:31,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:31,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:31,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:21:31,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091874740] [2020-10-29 09:21:31,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:31,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:21:31,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288148231] [2020-10-29 09:21:31,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:21:31,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:31,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:21:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:21:31,068 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 12 states. [2020-10-29 09:21:31,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:31,487 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-10-29 09:21:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:21:31,489 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-29 09:21:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:31,490 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:21:31,490 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 09:21:31,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:21:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 09:21:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-10-29 09:21:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:21:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-29 09:21:31,497 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 42 [2020-10-29 09:21:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:31,497 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-29 09:21:31,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:21:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-29 09:21:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:21:31,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:31,498 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:31,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:21:31,499 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:31,499 INFO L82 PathProgramCache]: Analyzing trace with hash 101482856, now seen corresponding path program 4 times [2020-10-29 09:21:31,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:31,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469236360] [2020-10-29 09:21:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:31,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:31,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:31,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:32,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:32,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:21:32,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:21:32,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-10-29 09:21:32,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:32,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:21:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:21:32,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:32,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:32,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:32,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:32,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:32,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:32,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:21:32,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:32,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:32,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:32,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:32,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:32,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:32,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469236360] [2020-10-29 09:21:32,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:32,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:21:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411594099] [2020-10-29 09:21:32,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:21:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:21:32,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:21:32,935 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 13 states. [2020-10-29 09:21:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:33,567 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-10-29 09:21:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:21:33,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-29 09:21:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:33,573 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:21:33,574 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:21:33,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:21:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:21:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-29 09:21:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:21:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-29 09:21:33,584 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 42 [2020-10-29 09:21:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:33,585 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-29 09:21:33,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:21:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-29 09:21:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:21:33,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:33,585 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:33,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:21:33,586 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:33,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1876490218, now seen corresponding path program 2 times [2020-10-29 09:21:33,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:33,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114780612] [2020-10-29 09:21:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:33,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:33,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:33,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:21:33,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:33,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-29 09:21:33,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:33,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:33,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:21:33,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:21:33,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:21:33,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:33,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:33,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:33,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:33,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:33,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:33,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:21:33,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:33,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:33,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 09:21:33,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114780612] [2020-10-29 09:21:33,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:33,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:21:33,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125377803] [2020-10-29 09:21:33,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:21:33,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:33,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:21:33,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:21:33,776 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 7 states. [2020-10-29 09:21:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:33,912 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2020-10-29 09:21:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:21:33,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-29 09:21:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:33,914 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:21:33,914 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:21:33,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:21:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:21:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-29 09:21:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:21:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-29 09:21:33,922 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 42 [2020-10-29 09:21:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:33,922 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-29 09:21:33,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:21:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-29 09:21:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:21:33,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:33,924 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:33,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:21:33,924 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:33,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:33,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1231151045, now seen corresponding path program 5 times [2020-10-29 09:21:33,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:33,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908414489] [2020-10-29 09:21:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:33,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:33,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:34,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:34,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:35,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:38,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:38,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:21:38,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:21:38,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:21:38,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:38,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:38,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:21:38,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:38,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:21:38,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:39,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:39,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:39,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:39,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:39,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:21:39,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:39,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:39,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:21:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:21:39,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908414489] [2020-10-29 09:21:39,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:39,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:21:39,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625317126] [2020-10-29 09:21:39,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:21:39,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:39,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:21:39,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:21:39,432 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 14 states. [2020-10-29 09:21:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:40,036 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-29 09:21:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:21:40,036 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-29 09:21:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:40,037 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:21:40,037 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:21:40,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:21:40,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:21:40,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-29 09:21:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:21:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-29 09:21:40,046 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 47 [2020-10-29 09:21:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:40,046 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-29 09:21:40,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:21:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-29 09:21:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:21:40,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:40,047 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:40,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:21:40,048 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:40,048 INFO L82 PathProgramCache]: Analyzing trace with hash -972985607, now seen corresponding path program 6 times [2020-10-29 09:21:40,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:40,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049574677] [2020-10-29 09:21:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:40,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:40,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:40,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:40,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:40,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:42,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:42,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:21:42,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:21:42,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2576 [2020-10-29 09:21:42,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:42,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:42,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:21:42,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:42,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:21:42,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:43,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:43,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:43,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:43,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:43,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:43,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:21:43,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:43,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:43,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:43,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:43,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:43,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:43,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049574677] [2020-10-29 09:21:43,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:43,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:21:43,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493871701] [2020-10-29 09:21:43,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:21:43,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:43,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:21:43,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:21:43,186 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 15 states. [2020-10-29 09:21:43,706 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-29 09:21:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:44,282 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-10-29 09:21:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:21:44,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-29 09:21:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:44,284 INFO L225 Difference]: With dead ends: 83 [2020-10-29 09:21:44,285 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:21:44,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:21:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:21:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-10-29 09:21:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:21:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-10-29 09:21:44,293 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 47 [2020-10-29 09:21:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:44,294 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-10-29 09:21:44,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:21:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-10-29 09:21:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:21:44,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:44,294 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:44,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:21:44,295 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:44,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1864684552, now seen corresponding path program 7 times [2020-10-29 09:21:44,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:44,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333326276] [2020-10-29 09:21:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:44,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:44,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:44,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:44,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:47,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:49,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:49,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:21:49,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:21:49,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4724 [2020-10-29 09:21:49,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:49,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:21:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:21:49,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:49,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:49,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:49,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:49,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:49,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:49,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:21:49,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:49,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:49,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:49,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:49,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:49,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:49,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333326276] [2020-10-29 09:21:49,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:49,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:21:49,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365202429] [2020-10-29 09:21:49,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:21:49,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:49,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:21:49,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:21:49,856 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 17 states. [2020-10-29 09:21:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:50,925 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-29 09:21:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:21:50,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-29 09:21:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:50,926 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:21:50,926 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:21:50,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:21:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:21:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2020-10-29 09:21:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:21:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-29 09:21:50,937 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 52 [2020-10-29 09:21:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:50,938 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-29 09:21:50,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:21:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-29 09:21:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:21:50,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:50,939 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:50,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:21:50,939 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:50,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1721216448, now seen corresponding path program 8 times [2020-10-29 09:21:50,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:50,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904575358] [2020-10-29 09:21:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:50,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:51,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:51,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:52,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:55,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:55,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:55,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:21:55,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:21:55,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:21:55,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:55,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:55,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:21:55,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:55,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:21:55,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:56,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:56,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:56,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:56,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:56,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:56,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:21:56,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:56,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:56,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:56,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:56,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:56,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:21:56,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904575358] [2020-10-29 09:21:56,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:56,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:21:56,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189830639] [2020-10-29 09:21:56,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:21:56,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:21:56,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:21:56,599 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 15 states. [2020-10-29 09:21:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:57,287 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-10-29 09:21:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:21:57,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-29 09:21:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:57,291 INFO L225 Difference]: With dead ends: 90 [2020-10-29 09:21:57,291 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:21:57,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:21:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:21:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-10-29 09:21:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:21:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-10-29 09:21:57,299 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 52 [2020-10-29 09:21:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:57,300 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-10-29 09:21:57,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:21:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-10-29 09:21:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:21:57,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:57,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:57,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:21:57,301 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:57,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1463051010, now seen corresponding path program 9 times [2020-10-29 09:21:57,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:57,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980193753] [2020-10-29 09:21:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:57,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:57,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:57,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:57,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:58,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:59,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:59,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:21:59,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:21:59,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2313 [2020-10-29 09:21:59,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:59,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:21:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:21:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:00,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:00,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:00,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:00,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:00,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:00,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:00,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:00,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:00,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:00,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980193753] [2020-10-29 09:22:00,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:00,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:22:00,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949816910] [2020-10-29 09:22:00,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:22:00,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:00,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:22:00,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:22:00,273 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 16 states. [2020-10-29 09:22:00,601 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-29 09:22:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:01,151 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2020-10-29 09:22:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:22:01,152 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-29 09:22:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:01,153 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:22:01,153 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:22:01,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:22:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:22:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2020-10-29 09:22:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:22:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-10-29 09:22:01,163 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 52 [2020-10-29 09:22:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:01,163 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-10-29 09:22:01,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:22:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-10-29 09:22:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:22:01,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:01,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:01,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:22:01,165 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash -782992640, now seen corresponding path program 10 times [2020-10-29 09:22:01,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:01,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126048623] [2020-10-29 09:22:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:01,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:01,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:01,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:02,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:02,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:22:02,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:22:02,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-10-29 09:22:02,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:02,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:22:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:22:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:02,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:02,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:02,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:02,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:02,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:02,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:02,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:02,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:02,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:02,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126048623] [2020-10-29 09:22:02,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:02,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:22:02,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344699442] [2020-10-29 09:22:02,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:22:02,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:02,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:22:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:22:02,821 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 16 states. [2020-10-29 09:22:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:03,815 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-29 09:22:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:22:03,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-29 09:22:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:03,817 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:22:03,817 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:22:03,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:22:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:22:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-10-29 09:22:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:22:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-29 09:22:03,827 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 52 [2020-10-29 09:22:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:03,828 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-29 09:22:03,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:22:03,828 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-29 09:22:03,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:22:03,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:03,829 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:03,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:22:03,829 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:03,830 INFO L82 PathProgramCache]: Analyzing trace with hash 992014722, now seen corresponding path program 3 times [2020-10-29 09:22:03,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:03,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086004841] [2020-10-29 09:22:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:03,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:03,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:03,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:22:03,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:03,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-29 09:22:03,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:03,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:22:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:22:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:22:03,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:04,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:04,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:04,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:04,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:04,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:04,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:04,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:04,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:04,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-29 09:22:04,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086004841] [2020-10-29 09:22:04,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:04,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:22:04,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204608065] [2020-10-29 09:22:04,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:22:04,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:04,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:22:04,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:22:04,041 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 8 states. [2020-10-29 09:22:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:04,189 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2020-10-29 09:22:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:22:04,189 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-29 09:22:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:04,190 INFO L225 Difference]: With dead ends: 115 [2020-10-29 09:22:04,190 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:22:04,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:22:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:22:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-29 09:22:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:22:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-29 09:22:04,198 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 52 [2020-10-29 09:22:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:04,198 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-29 09:22:04,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:22:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-29 09:22:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:22:04,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:04,199 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:04,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:22:04,200 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:04,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1956067985, now seen corresponding path program 11 times [2020-10-29 09:22:04,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:04,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546434988] [2020-10-29 09:22:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:04,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:04,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:04,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:04,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:05,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:05,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:05,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:09,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:09,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:22:09,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:22:09,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:22:09,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:09,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:09,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:22:09,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:09,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:22:09,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:10,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:10,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:10,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:10,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:10,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:10,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:10,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:10,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:10,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:10,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:10,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:10,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:22:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546434988] [2020-10-29 09:22:10,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:10,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:22:10,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535764233] [2020-10-29 09:22:10,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:22:10,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:10,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:22:10,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:22:10,101 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 17 states. [2020-10-29 09:22:10,563 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-29 09:22:10,851 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-29 09:22:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:11,318 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2020-10-29 09:22:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:22:11,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-10-29 09:22:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:11,320 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:22:11,320 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:22:11,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:22:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:22:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-10-29 09:22:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:22:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-29 09:22:11,329 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 57 [2020-10-29 09:22:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:11,329 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-29 09:22:11,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:22:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-29 09:22:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:22:11,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:11,330 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:11,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:22:11,331 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2080733873, now seen corresponding path program 12 times [2020-10-29 09:22:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:11,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278180430] [2020-10-29 09:22:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:11,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:11,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:11,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:11,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:12,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:14,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:16,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:16,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:22:16,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:22:16,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4855 [2020-10-29 09:22:16,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:16,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:22:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:22:16,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:16,612 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-29 09:22:17,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:17,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:17,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:17,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:17,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:17,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:17,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:17,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:17,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:17,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:17,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:17,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:17,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278180430] [2020-10-29 09:22:17,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:17,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:22:17,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603079049] [2020-10-29 09:22:17,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:22:17,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:17,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:22:17,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:22:17,105 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 18 states. [2020-10-29 09:22:17,611 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 09:22:17,773 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-29 09:22:17,972 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-29 09:22:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:18,650 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2020-10-29 09:22:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:22:18,652 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-29 09:22:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:18,653 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:22:18,653 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:22:18,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:22:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:22:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-29 09:22:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:22:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-10-29 09:22:18,661 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 57 [2020-10-29 09:22:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:18,661 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-10-29 09:22:18,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:22:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-10-29 09:22:18,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:22:18,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:18,662 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:18,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:22:18,662 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:18,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:18,663 INFO L82 PathProgramCache]: Analyzing trace with hash -726541088, now seen corresponding path program 13 times [2020-10-29 09:22:18,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:18,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521260521] [2020-10-29 09:22:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:18,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:18,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:18,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:19,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:19,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:20,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:23,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:23,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:22:23,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:22:23,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:22:23,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:23,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:23,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:22:23,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:23,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:22:23,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:24,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:24,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:24,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:24,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:24,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:24,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:22:24,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:24,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:24,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:24,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:24,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:24,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:22:24,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521260521] [2020-10-29 09:22:24,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:24,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:22:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980945985] [2020-10-29 09:22:24,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:22:24,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:24,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:22:24,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:22:24,624 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 19 states. [2020-10-29 09:22:25,342 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-29 09:22:25,496 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-29 09:22:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:25,777 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-10-29 09:22:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:22:25,778 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-29 09:22:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:25,779 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:22:25,779 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:22:25,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:22:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:22:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-29 09:22:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:22:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-29 09:22:25,789 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2020-10-29 09:22:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:25,789 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-29 09:22:25,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:22:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-29 09:22:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:22:25,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:25,790 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:25,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:22:25,790 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash -468375650, now seen corresponding path program 14 times [2020-10-29 09:22:25,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:25,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554137069] [2020-10-29 09:22:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:25,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:25,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:25,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:27,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:28,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:30,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:30,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:22:30,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:22:30,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4537 [2020-10-29 09:22:30,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:30,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:22:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:22:30,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:30,818 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-29 09:22:30,951 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 09:22:31,109 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-29 09:22:31,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:31,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:31,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:31,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:31,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:31,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:31,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:31,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:31,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:31,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:31,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:31,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:31,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554137069] [2020-10-29 09:22:31,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:31,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:22:31,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751956006] [2020-10-29 09:22:31,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:22:31,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:31,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:22:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:22:31,595 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 20 states. [2020-10-29 09:22:32,203 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-29 09:22:32,566 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-29 09:22:32,759 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-10-29 09:22:33,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:33,384 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2020-10-29 09:22:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:22:33,386 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-29 09:22:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:33,387 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:22:33,388 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:22:33,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:22:33,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:22:33,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-29 09:22:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:22:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2020-10-29 09:22:33,399 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2020-10-29 09:22:33,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:33,399 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2020-10-29 09:22:33,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:22:33,399 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2020-10-29 09:22:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:22:33,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:33,400 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:33,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:22:33,401 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:33,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:33,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1306631712, now seen corresponding path program 4 times [2020-10-29 09:22:33,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:33,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614578662] [2020-10-29 09:22:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:33,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:33,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:35,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:35,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:22:35,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:22:35,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2302 [2020-10-29 09:22:35,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:35,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:35,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:22:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:22:35,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:36,311 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-29 09:22:36,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:36,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:36,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:36,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:36,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:36,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:36,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:36,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:36,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:36,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614578662] [2020-10-29 09:22:36,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:36,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:22:36,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014829324] [2020-10-29 09:22:36,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:22:36,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:36,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:22:36,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:22:36,707 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 20 states. [2020-10-29 09:22:37,060 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-29 09:22:37,486 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-10-29 09:22:37,787 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-29 09:22:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:38,275 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2020-10-29 09:22:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:22:38,276 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-29 09:22:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:38,277 INFO L225 Difference]: With dead ends: 103 [2020-10-29 09:22:38,277 INFO L226 Difference]: Without dead ends: 98 [2020-10-29 09:22:38,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:22:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-29 09:22:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-10-29 09:22:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 09:22:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-29 09:22:38,285 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 62 [2020-10-29 09:22:38,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:38,285 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-29 09:22:38,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:22:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-29 09:22:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:22:38,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:38,286 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:38,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:22:38,286 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:38,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1355577240, now seen corresponding path program 15 times [2020-10-29 09:22:38,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:38,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248516610] [2020-10-29 09:22:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:38,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:39,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:40,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:42,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:43,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:43,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:22:43,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:22:43,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 09:22:43,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:43,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:22:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:22:43,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:43,931 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 09:22:44,109 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-29 09:22:44,312 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-29 09:22:44,456 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-29 09:22:44,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:44,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:44,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:44,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:44,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:44,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:44,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:44,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:44,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 63 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:22:44,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248516610] [2020-10-29 09:22:44,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:44,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:22:44,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406943946] [2020-10-29 09:22:44,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:22:44,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:22:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:22:44,821 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 18 states. [2020-10-29 09:22:45,361 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-29 09:22:45,683 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-10-29 09:22:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:46,326 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-10-29 09:22:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:22:46,327 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-29 09:22:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:46,328 INFO L225 Difference]: With dead ends: 107 [2020-10-29 09:22:46,328 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:22:46,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:22:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:22:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-10-29 09:22:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 09:22:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2020-10-29 09:22:46,337 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 62 [2020-10-29 09:22:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:46,338 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2020-10-29 09:22:46,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:22:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2020-10-29 09:22:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:22:46,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:46,339 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:46,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:22:46,339 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:46,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1928272806, now seen corresponding path program 16 times [2020-10-29 09:22:46,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:46,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909590482] [2020-10-29 09:22:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:46,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:46,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:46,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:46,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:48,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:49,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:49,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:22:49,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:22:49,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3268 [2020-10-29 09:22:49,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:49,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:22:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:22:49,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:50,165 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-29 09:22:50,437 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-29 09:22:50,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:50,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:50,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:50,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:50,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:50,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:50,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:50,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:50,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:50,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:50,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:50,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909590482] [2020-10-29 09:22:50,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:50,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:22:50,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890773926] [2020-10-29 09:22:50,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:22:50,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:50,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:22:50,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:22:50,802 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand 19 states. [2020-10-29 09:22:51,511 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-29 09:22:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:52,356 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2020-10-29 09:22:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:22:52,356 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-29 09:22:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:52,358 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:22:52,358 INFO L226 Difference]: Without dead ends: 98 [2020-10-29 09:22:52,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:22:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-29 09:22:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-29 09:22:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:22:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-29 09:22:52,369 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 62 [2020-10-29 09:22:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:52,369 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-29 09:22:52,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:22:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-29 09:22:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:22:52,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:52,370 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:52,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:22:52,370 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:52,371 INFO L82 PathProgramCache]: Analyzing trace with hash -591687128, now seen corresponding path program 5 times [2020-10-29 09:22:52,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:52,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504731020] [2020-10-29 09:22:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:52,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:52,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:53,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:53,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:22:53,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:53,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1113 [2020-10-29 09:22:53,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:53,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:53,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:22:53,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:53,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:22:53,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:53,953 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-29 09:22:54,236 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-29 09:22:54,460 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-29 09:22:54,596 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-29 09:22:54,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:54,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:54,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:54,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:54,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:22:54,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:54,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:54,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:54,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:54,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:54,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:55,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504731020] [2020-10-29 09:22:55,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:55,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:22:55,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324041194] [2020-10-29 09:22:55,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:22:55,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:55,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:22:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:22:55,037 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 19 states. [2020-10-29 09:22:55,459 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-29 09:22:55,859 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-29 09:22:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:56,758 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-29 09:22:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:22:56,759 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-29 09:22:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:56,761 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:22:56,761 INFO L226 Difference]: Without dead ends: 98 [2020-10-29 09:22:56,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:22:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-29 09:22:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-29 09:22:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:22:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2020-10-29 09:22:56,773 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 62 [2020-10-29 09:22:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:56,773 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2020-10-29 09:22:56,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:22:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2020-10-29 09:22:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:22:56,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:56,774 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:56,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:22:56,774 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash 88371242, now seen corresponding path program 6 times [2020-10-29 09:22:56,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:56,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219747805] [2020-10-29 09:22:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:56,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:56,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:56,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:22:56,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:56,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-29 09:22:56,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:56,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:56,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:56,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:22:56,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:22:56,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:57,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:57,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:57,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:57,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:57,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:57,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:57,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:57,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:57,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-29 09:22:57,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219747805] [2020-10-29 09:22:57,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:57,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:22:57,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270574872] [2020-10-29 09:22:57,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:22:57,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:57,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:22:57,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:22:57,052 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand 9 states. [2020-10-29 09:22:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:57,223 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2020-10-29 09:22:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:22:57,224 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-29 09:22:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:57,225 INFO L225 Difference]: With dead ends: 135 [2020-10-29 09:22:57,225 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:22:57,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:22:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:22:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-29 09:22:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:22:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-29 09:22:57,240 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 62 [2020-10-29 09:22:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:57,241 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-29 09:22:57,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:22:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-29 09:22:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:22:57,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:57,242 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:57,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:22:57,242 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1195179897, now seen corresponding path program 17 times [2020-10-29 09:22:57,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:57,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761516788] [2020-10-29 09:22:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:57,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:57,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:58,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:58,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:02,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:02,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:23:02,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:23:02,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 09:23:02,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:02,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:02,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:23:02,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:02,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:23:02,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:02,600 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-29 09:23:02,898 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 09:23:03,112 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-29 09:23:03,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:03,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:03,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:03,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:03,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:03,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:03,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:03,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:03,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:23:03,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761516788] [2020-10-29 09:23:03,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:03,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:23:03,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007605181] [2020-10-29 09:23:03,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:23:03,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:23:03,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:23:03,686 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 20 states. [2020-10-29 09:23:04,365 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-29 09:23:04,738 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-29 09:23:04,959 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-29 09:23:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:05,586 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-29 09:23:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:23:05,586 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-10-29 09:23:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:05,587 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:23:05,587 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:23:05,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:23:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:23:05,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-29 09:23:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:23:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-10-29 09:23:05,597 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 67 [2020-10-29 09:23:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:05,597 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-10-29 09:23:05,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:23:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-10-29 09:23:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:23:05,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:05,598 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:05,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:23:05,598 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:05,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:05,599 INFO L82 PathProgramCache]: Analyzing trace with hash 184062647, now seen corresponding path program 18 times [2020-10-29 09:23:05,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:05,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941600731] [2020-10-29 09:23:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:05,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:06,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:08,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:10,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:10,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:23:10,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:23:10,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:23:10,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:10,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:10,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:23:10,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:23:10,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:11,017 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-29 09:23:11,152 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-29 09:23:11,460 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-29 09:23:11,593 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-29 09:23:11,786 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-29 09:23:12,159 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-29 09:23:12,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:12,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:12,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:12,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:12,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:12,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:12,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:12,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:12,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:12,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:23:12,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941600731] [2020-10-29 09:23:12,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:12,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:23:12,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534665325] [2020-10-29 09:23:12,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:23:12,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:23:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:23:12,657 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 21 states. [2020-10-29 09:23:13,132 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-29 09:23:13,578 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-29 09:23:13,773 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-29 09:23:14,101 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 84 [2020-10-29 09:23:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:14,929 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-10-29 09:23:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:23:14,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-29 09:23:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:14,932 INFO L225 Difference]: With dead ends: 113 [2020-10-29 09:23:14,932 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:23:14,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:23:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:23:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2020-10-29 09:23:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:23:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2020-10-29 09:23:14,944 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 67 [2020-10-29 09:23:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:14,944 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2020-10-29 09:23:14,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:23:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2020-10-29 09:23:14,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:23:14,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:14,945 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:14,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:23:14,946 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:14,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:14,946 INFO L82 PathProgramCache]: Analyzing trace with hash 864121017, now seen corresponding path program 19 times [2020-10-29 09:23:14,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:14,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209891284] [2020-10-29 09:23:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:14,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:15,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:15,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:16,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:18,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:18,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:23:18,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:23:18,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3471 [2020-10-29 09:23:18,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:18,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:23:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:23:18,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:18,926 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-29 09:23:19,204 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-29 09:23:19,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:19,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:19,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:19,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:19,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:19,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:19,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:19,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:19,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:19,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:19,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:19,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:23:19,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209891284] [2020-10-29 09:23:19,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:19,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:23:19,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126288330] [2020-10-29 09:23:19,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:23:19,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:23:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:23:19,867 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand 21 states. [2020-10-29 09:23:20,453 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-29 09:23:20,801 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 09:23:21,243 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2020-10-29 09:23:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:22,034 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2020-10-29 09:23:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:23:22,035 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-29 09:23:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:22,036 INFO L225 Difference]: With dead ends: 113 [2020-10-29 09:23:22,036 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:23:22,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:23:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:23:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-10-29 09:23:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:23:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2020-10-29 09:23:22,048 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 67 [2020-10-29 09:23:22,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:22,049 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2020-10-29 09:23:22,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:23:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2020-10-29 09:23:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:23:22,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:22,050 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:22,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:23:22,050 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:22,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1655838917, now seen corresponding path program 7 times [2020-10-29 09:23:22,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:22,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86834087] [2020-10-29 09:23:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:22,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:23,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:23,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:23:23,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:23:23,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1049 [2020-10-29 09:23:23,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:23,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:23,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:23:23,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:23,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:23:23,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:23,565 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-29 09:23:23,783 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-29 09:23:23,918 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-29 09:23:24,063 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-29 09:23:24,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:24,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:24,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:24,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:24,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:24,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:23:24,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:24,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:24,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:23:24,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86834087] [2020-10-29 09:23:24,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:24,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:23:24,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389633395] [2020-10-29 09:23:24,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:23:24,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:24,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:23:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:23:24,601 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand 21 states. [2020-10-29 09:23:25,122 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-29 09:23:25,309 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 09:23:25,548 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2020-10-29 09:23:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:26,684 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-10-29 09:23:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:23:26,685 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-29 09:23:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:26,686 INFO L225 Difference]: With dead ends: 113 [2020-10-29 09:23:26,686 INFO L226 Difference]: Without dead ends: 108 [2020-10-29 09:23:26,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:23:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-29 09:23:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2020-10-29 09:23:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 09:23:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2020-10-29 09:23:26,700 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 67 [2020-10-29 09:23:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:26,700 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2020-10-29 09:23:26,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:23:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2020-10-29 09:23:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:23:26,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:26,701 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:26,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:23:26,702 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1044635206, now seen corresponding path program 20 times [2020-10-29 09:23:26,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:26,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34655913] [2020-10-29 09:23:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:26,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:26,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:26,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:30,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:30,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:31,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:31,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:23:31,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:23:31,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-29 09:23:31,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:31,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:23:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:23:31,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:32,289 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-29 09:23:32,575 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-29 09:23:32,867 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-29 09:23:33,020 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-29 09:23:33,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:33,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:33,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:33,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:33,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:33,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:33,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:33,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:33,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 17 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:23:33,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34655913] [2020-10-29 09:23:33,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:33,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:23:33,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582727975] [2020-10-29 09:23:33,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:23:33,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:23:33,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:23:33,734 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand 23 states. [2020-10-29 09:23:34,309 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-29 09:23:34,495 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 09:23:34,797 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-29 09:23:35,100 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2020-10-29 09:23:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:36,053 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2020-10-29 09:23:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:23:36,054 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-10-29 09:23:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:36,055 INFO L225 Difference]: With dead ends: 145 [2020-10-29 09:23:36,056 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 09:23:36,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:23:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 09:23:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 121. [2020-10-29 09:23:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:23:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2020-10-29 09:23:36,072 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 72 [2020-10-29 09:23:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:36,072 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2020-10-29 09:23:36,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:23:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2020-10-29 09:23:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:23:36,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:36,073 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:36,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:23:36,074 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1724693576, now seen corresponding path program 21 times [2020-10-29 09:23:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:36,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720413292] [2020-10-29 09:23:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:36,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:36,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:37,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:37,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:39,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:39,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:23:39,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:23:39,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3483 [2020-10-29 09:23:39,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:39,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:39,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:23:39,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:39,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:23:39,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:40,098 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-29 09:23:40,359 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-29 09:23:40,694 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-29 09:23:40,886 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-29 09:23:41,067 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-29 09:23:41,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:41,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:41,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:41,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:41,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:41,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:41,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:41,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:41,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:41,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:41,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:41,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:23:41,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720413292] [2020-10-29 09:23:41,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:41,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:23:41,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639174169] [2020-10-29 09:23:41,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:23:41,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:41,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:23:41,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:23:41,647 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand 23 states. [2020-10-29 09:23:42,381 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-29 09:23:42,621 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-29 09:23:42,939 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2020-10-29 09:23:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:44,141 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2020-10-29 09:23:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:23:44,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-10-29 09:23:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:44,143 INFO L225 Difference]: With dead ends: 146 [2020-10-29 09:23:44,143 INFO L226 Difference]: Without dead ends: 141 [2020-10-29 09:23:44,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:23:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-29 09:23:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2020-10-29 09:23:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:23:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2020-10-29 09:23:44,158 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 72 [2020-10-29 09:23:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:44,159 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2020-10-29 09:23:44,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:23:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2020-10-29 09:23:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:23:44,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:44,160 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:44,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:23:44,160 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:44,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2066296638, now seen corresponding path program 22 times [2020-10-29 09:23:44,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:44,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484199927] [2020-10-29 09:23:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:44,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:44,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:44,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:44,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:47,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:48,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:48,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:23:48,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:23:48,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4758 [2020-10-29 09:23:48,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:48,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:48,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:23:48,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:48,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:23:48,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:49,307 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-29 09:23:49,488 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-29 09:23:49,726 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-29 09:23:50,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:50,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:50,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:50,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:50,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:50,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:50,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:50,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:50,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:50,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:50,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 21 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:23:50,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484199927] [2020-10-29 09:23:50,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:50,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:23:50,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537531080] [2020-10-29 09:23:50,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:23:50,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:50,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:23:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:23:50,692 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand 22 states. [2020-10-29 09:23:51,215 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-29 09:23:51,595 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-29 09:23:51,771 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 09:23:52,076 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-29 09:23:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:53,257 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2020-10-29 09:23:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:23:53,258 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-29 09:23:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:53,260 INFO L225 Difference]: With dead ends: 146 [2020-10-29 09:23:53,260 INFO L226 Difference]: Without dead ends: 136 [2020-10-29 09:23:53,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:23:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-29 09:23:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-10-29 09:23:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 09:23:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2020-10-29 09:23:53,272 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 72 [2020-10-29 09:23:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:53,272 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2020-10-29 09:23:53,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:23:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2020-10-29 09:23:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:23:53,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:53,274 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:53,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:23:53,274 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1548612288, now seen corresponding path program 23 times [2020-10-29 09:23:53,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:53,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276811650] [2020-10-29 09:23:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:53,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:54,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:55,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:55,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:23:55,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:23:55,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2275 [2020-10-29 09:23:55,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:55,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:55,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:23:55,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:55,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 09:23:55,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:56,047 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-29 09:23:56,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:56,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:56,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:56,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:56,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:56,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:23:56,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:56,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:56,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:56,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:56,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 11 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:23:56,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276811650] [2020-10-29 09:23:56,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:56,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:23:56,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089726216] [2020-10-29 09:23:56,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:23:56,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:23:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:23:56,878 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand 22 states. [2020-10-29 09:23:57,793 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-10-29 09:23:58,234 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2020-10-29 09:23:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:59,357 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2020-10-29 09:23:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:23:59,358 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-29 09:23:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:59,359 INFO L225 Difference]: With dead ends: 146 [2020-10-29 09:23:59,359 INFO L226 Difference]: Without dead ends: 136 [2020-10-29 09:23:59,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:23:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-29 09:23:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-29 09:23:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-29 09:23:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2020-10-29 09:23:59,374 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 72 [2020-10-29 09:23:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:59,374 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2020-10-29 09:23:59,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:23:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2020-10-29 09:23:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:23:59,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:59,376 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:59,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:23:59,376 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:59,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:59,376 INFO L82 PathProgramCache]: Analyzing trace with hash 226395074, now seen corresponding path program 8 times [2020-10-29 09:23:59,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:59,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884202191] [2020-10-29 09:23:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:59,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:59,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:59,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:23:59,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-29 09:23:59,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:59,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:23:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:23:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:23:59,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:59,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:59,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:59,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:59,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:59,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:59,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:23:59,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:59,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:59,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-29 09:23:59,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884202191] [2020-10-29 09:23:59,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:59,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:23:59,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210507768] [2020-10-29 09:23:59,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:23:59,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:23:59,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:23:59,760 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand 10 states. [2020-10-29 09:24:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:00,015 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2020-10-29 09:24:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:24:00,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-29 09:24:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:00,017 INFO L225 Difference]: With dead ends: 203 [2020-10-29 09:24:00,017 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:24:00,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:24:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-29 09:24:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:24:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2020-10-29 09:24:00,031 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 72 [2020-10-29 09:24:00,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:00,031 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2020-10-29 09:24:00,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2020-10-29 09:24:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 09:24:00,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:00,032 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:00,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:24:00,033 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:00,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1364489239, now seen corresponding path program 24 times [2020-10-29 09:24:00,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:00,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198045978] [2020-10-29 09:24:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:00,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:00,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:00,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:05,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:05,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 09:24:05,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:24:05,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-29 09:24:05,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:05,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:05,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:24:05,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:05,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 09:24:05,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:05,548 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-29 09:24:05,963 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-29 09:24:06,352 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-29 09:24:06,519 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-29 09:24:07,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:07,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:07,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:07,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:07,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:07,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:24:07,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:07,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:07,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:07,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:07,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:07,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 3 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:07,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198045978] [2020-10-29 09:24:07,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:07,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:24:07,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476986027] [2020-10-29 09:24:07,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:24:07,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:07,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:24:07,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:24:07,184 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand 25 states. [2020-10-29 09:24:08,030 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 82 [2020-10-29 09:24:08,435 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 91 [2020-10-29 09:24:08,884 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 89 [2020-10-29 09:24:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:09,965 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-10-29 09:24:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:24:09,966 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2020-10-29 09:24:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:09,967 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:24:09,967 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 09:24:09,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:24:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 09:24:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-10-29 09:24:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:24:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-10-29 09:24:09,978 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 77 [2020-10-29 09:24:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:09,979 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-10-29 09:24:09,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:24:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-10-29 09:24:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 09:24:09,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:09,980 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:09,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:24:09,980 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2127985233, now seen corresponding path program 25 times [2020-10-29 09:24:09,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:09,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357751346] [2020-10-29 09:24:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:10,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:10,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:10,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:15,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:15,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 09:24:15,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:24:15,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 09:24:15,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:15,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:15,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:24:15,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 09:24:15,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:15,433 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-29 09:24:15,718 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-29 09:24:16,003 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-29 09:24:16,289 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-29 09:24:16,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:16,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:16,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:16,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:16,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:16,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:24:16,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:16,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:16,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 33 proven. 139 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:24:17,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357751346] [2020-10-29 09:24:17,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:17,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:24:17,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491807966] [2020-10-29 09:24:17,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:24:17,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:17,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:24:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:24:17,023 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 23 states. [2020-10-29 09:24:17,975 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-29 09:24:18,458 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2020-10-29 09:24:18,761 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2020-10-29 09:24:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:19,629 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-10-29 09:24:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:24:19,630 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-10-29 09:24:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:19,631 INFO L225 Difference]: With dead ends: 119 [2020-10-29 09:24:19,631 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 09:24:19,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:24:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 09:24:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-29 09:24:19,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:24:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2020-10-29 09:24:19,641 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 77 [2020-10-29 09:24:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:19,642 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2020-10-29 09:24:19,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:24:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2020-10-29 09:24:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 09:24:19,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:19,643 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:19,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:24:19,643 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1908816625, now seen corresponding path program 26 times [2020-10-29 09:24:19,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:19,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395286211] [2020-10-29 09:24:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:19,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:20,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking...