/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-ext3-properties/sll_length_check-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:21:51,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:21:51,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:21:51,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:21:51,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:21:51,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:21:51,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:21:51,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:21:51,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:21:51,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:21:51,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:21:51,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:21:51,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:21:51,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:21:51,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:21:51,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:21:51,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:21:51,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:21:51,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:21:51,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:21:51,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:21:51,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:21:51,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:21:51,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:21:51,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:21:51,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:21:51,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:21:51,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:21:51,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:21:51,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:21:51,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:21:51,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:21:51,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:21:51,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:21:51,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:21:51,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:21:51,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:21:51,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:21:51,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:21:51,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:21:51,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:21:51,818 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 09:21:51,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:21:51,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:21:51,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:21:51,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:21:51,874 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:21:51,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:21:51,874 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:21:51,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:21:51,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:21:51,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:21:51,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:21:51,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:21:51,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:21:51,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:21:51,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:21:51,877 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:21:51,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:21:51,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:21:51,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:21:51,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:21:51,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:21:51,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:21:51,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:21:51,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:21:51,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:21:51,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:21:51,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:21:51,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:21:51,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:21:51,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:21:52,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:21:52,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:21:52,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:21:52,394 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:21:52,394 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:21:52,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2020-10-29 09:21:52,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f456e3e2/cc182868d341430f85c13529e6ba77ce/FLAG3dc952c9e [2020-10-29 09:21:53,127 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:21:53,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2020-10-29 09:21:53,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f456e3e2/cc182868d341430f85c13529e6ba77ce/FLAG3dc952c9e [2020-10-29 09:21:53,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f456e3e2/cc182868d341430f85c13529e6ba77ce [2020-10-29 09:21:53,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:21:53,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:21:53,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:21:53,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:21:53,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:21:53,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:21:53" (1/1) ... [2020-10-29 09:21:53,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a7a8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53, skipping insertion in model container [2020-10-29 09:21:53,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:21:53" (1/1) ... [2020-10-29 09:21:53,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:21:53,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:21:53,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:21:53,875 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:21:53,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:21:53,988 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:21:53,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53 WrapperNode [2020-10-29 09:21:53,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:21:53,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:21:53,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:21:53,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:21:54,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53" (1/1) ... [2020-10-29 09:21:54,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53" (1/1) ... [2020-10-29 09:21:54,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53" (1/1) ... [2020-10-29 09:21:54,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53" (1/1) ... [2020-10-29 09:21:54,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53" (1/1) ... [2020-10-29 09:21:54,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53" (1/1) ... [2020-10-29 09:21:54,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53" (1/1) ... [2020-10-29 09:21:54,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:21:54,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:21:54,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:21:54,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:21:54,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53" (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 09:21:54,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:21:54,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:21:54,226 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:21:54,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:21:54,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:21:54,227 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-29 09:21:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-29 09:21:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-10-29 09:21:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-29 09:21:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:21:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:21:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:21:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:21:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:21:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:21:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:21:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:21:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:21:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:21:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:21:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:21:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:21:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:21:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:21:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:21:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:21:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:21:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:21:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:21:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:21:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:21:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:21:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:21:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:21:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:21:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:21:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:21:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:21:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:21:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:21:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:21:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:21:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:21:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:21:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:21:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:21:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:21:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:21:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:21:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:21:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:21:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:21:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:21:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:21:54,241 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:21:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:21:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:21:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:21:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:21:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:21:54,243 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:21:54,243 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:21:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:21:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:21:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:21:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:21:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:21:54,245 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:21:54,245 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:21:54,245 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:21:54,246 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:21:54,246 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:21:54,248 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:21:54,248 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:21:54,249 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:21:54,249 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:21:54,249 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:21:54,250 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:21:54,250 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:21:54,250 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:21:54,250 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:21:54,250 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:21:54,251 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:21:54,251 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:21:54,251 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:21:54,251 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:21:54,252 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:21:54,252 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:21:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:21:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:21:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:21:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:21:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:21:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:21:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:21:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:21:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:21:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:21:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:21:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:21:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:21:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:21:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:21:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:21:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:21:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:21:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:21:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:21:54,256 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:21:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:21:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:21:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:21:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:21:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:21:54,258 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:21:54,258 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:21:54,259 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:21:54,259 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:21:54,260 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:21:54,260 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:21:54,261 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:21:54,261 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-29 09:21:54,261 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-29 09:21:54,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:21:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:21:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-10-29 09:21:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:21:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-29 09:21:54,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:21:54,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:21:54,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:21:54,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:21:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:21:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:21:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:21:54,843 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-29 09:21:54,986 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:21:54,986 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-29 09:21:54,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:21:54 BoogieIcfgContainer [2020-10-29 09:21:54,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:21:54,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:21:54,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:21:54,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:21:54,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:21:53" (1/3) ... [2020-10-29 09:21:54,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee6f761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:21:54, skipping insertion in model container [2020-10-29 09:21:54,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:21:53" (2/3) ... [2020-10-29 09:21:54,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee6f761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:21:54, skipping insertion in model container [2020-10-29 09:21:54,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:21:54" (3/3) ... [2020-10-29 09:21:54,998 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2020-10-29 09:21:55,010 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:21:55,016 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:21:55,029 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:21:55,054 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:21:55,055 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:21:55,055 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:21:55,055 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:21:55,055 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:21:55,055 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:21:55,055 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:21:55,055 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:21:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-29 09:21:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:21:55,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:55,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:55,081 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:55,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1271350858, now seen corresponding path program 1 times [2020-10-29 09:21:55,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:55,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657209023] [2020-10-29 09:21:55,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:55,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:55,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:55,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:21:55,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:21:55,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-29 09:21:55,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:55,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:21:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:55,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:21:55,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:55,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:55,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:55,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:55,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:55,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:21:55,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:55,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:55,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:55,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:55,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:55,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:55,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 09:21:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:55,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:55,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:55,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:21:55,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:55,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:21:55,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:55,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:55,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:55,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-29 09:21:55,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:55,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:55,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-29 09:21:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:55,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:55,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:55,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:21:55,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:55,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:21:55,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:55,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:55,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:55,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-29 09:21:55,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:55,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:55,631 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 09:21:55,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657209023] [2020-10-29 09:21:55,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:21:55,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:21:55,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427126890] [2020-10-29 09:21:55,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:21:55,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:21:55,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:21:55,658 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2020-10-29 09:21:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:55,898 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2020-10-29 09:21:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:21:55,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-29 09:21:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:55,910 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:21:55,911 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:21:55,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:21:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:21:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-29 09:21:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:21:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-29 09:21:55,964 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-10-29 09:21:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:55,965 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-29 09:21:55,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:21:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-29 09:21:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:21:55,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:55,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:55,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:21:55,967 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:55,968 INFO L82 PathProgramCache]: Analyzing trace with hash -272217543, now seen corresponding path program 1 times [2020-10-29 09:21:55,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:55,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264283185] [2020-10-29 09:21:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:55,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:56,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:56,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:56,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:56,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:56,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:21:56,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:21:56,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-29 09:21:56,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:56,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:21:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:21:56,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:56,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:56,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:56,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:56,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:56,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:56,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:21:56,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:56,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:56,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:56,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:21:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:56,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:56,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:56,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:21:56,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:56,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 09:21:56,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:56,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:56,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:21:56,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:21:56,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:21:56,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:56,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-29 09:21:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:56,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:56,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:56,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:21:56,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:56,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:21:56,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:56,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:56,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:56,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-29 09:21:56,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:56,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:56,737 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 09:21:56,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264283185] [2020-10-29 09:21:56,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:21:56,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:21:56,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316910545] [2020-10-29 09:21:56,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:21:56,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:56,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:21:56,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:21:56,741 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 7 states. [2020-10-29 09:21:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:57,029 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-29 09:21:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:21:57,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-29 09:21:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:57,031 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:21:57,031 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:21:57,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:21:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:21:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-29 09:21:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:21:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-29 09:21:57,042 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2020-10-29 09:21:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:57,042 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-29 09:21:57,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:21:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-29 09:21:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:21:57,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:57,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:21:57,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:21:57,044 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash -991161197, now seen corresponding path program 1 times [2020-10-29 09:21:57,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:57,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614399124] [2020-10-29 09:21:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:57,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:57,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:57,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:57,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:57,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:58,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:59,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:59,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:21:59,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:21:59,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2931 [2020-10-29 09:21:59,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:59,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:59,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:21:59,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:21:59,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:21:59,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:22:00,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:00,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:00,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:00,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:00,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:00,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:22:00,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:00,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:00,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:00,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:00,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:00,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:22:00,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:00,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:00,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:22:00,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:00,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 09:22:00,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:00,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:00,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:22:00,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:00,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:22:00,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:22:00,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 09:22:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:00,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:00,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:00,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:22:00,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:00,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:22:00,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:00,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-29 09:22:00,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:22:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:00,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614399124] [2020-10-29 09:22:00,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:00,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:22:00,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723570262] [2020-10-29 09:22:00,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:22:00,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:00,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:22:00,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:22:00,225 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states. [2020-10-29 09:22:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:00,566 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-29 09:22:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:22:00,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-29 09:22:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:00,568 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:22:00,568 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:22:00,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:22:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:22:00,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-29 09:22:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:22:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-29 09:22:00,589 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-10-29 09:22:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:00,589 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-29 09:22:00,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:22:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-29 09:22:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:22:00,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:00,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:00,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:22:00,594 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:00,594 INFO L82 PathProgramCache]: Analyzing trace with hash -39652359, now seen corresponding path program 2 times [2020-10-29 09:22:00,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:00,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160560365] [2020-10-29 09:22:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:00,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:00,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:00,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:00,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:00,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:01,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:02,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:02,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:22:02,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:22:02,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1669 [2020-10-29 09:22:02,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:02,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:22:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:22:02,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:02,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:02,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:02,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:02,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:02,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:02,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:22:02,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:02,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:02,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:02,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:02,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:02,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:22:02,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:02,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 09:22:02,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:02,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:22:02,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:02,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:22:02,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:02,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 09:22:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:02,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:02,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:22:02,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:02,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:02,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-29 09:22:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:02,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160560365] [2020-10-29 09:22:02,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:02,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:22:02,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847382681] [2020-10-29 09:22:02,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:22:02,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:02,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:22:02,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:22:02,484 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 10 states. [2020-10-29 09:22:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:02,893 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-29 09:22:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:22:02,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-29 09:22:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:02,897 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:22:02,897 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:22:02,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:22:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:22:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-10-29 09:22:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:22:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-29 09:22:02,912 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-10-29 09:22:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:02,912 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-29 09:22:02,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:22:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-29 09:22:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:22:02,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:02,915 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:02,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:22:02,916 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:02,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:02,916 INFO L82 PathProgramCache]: Analyzing trace with hash -101691973, now seen corresponding path program 1 times [2020-10-29 09:22:02,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:02,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553305100] [2020-10-29 09:22:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:02,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:03,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:03,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:03,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:22:03,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:03,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-29 09:22:03,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:03,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:03,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:22:03,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:22:03,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:22:03,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:03,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:03,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:03,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:03,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:03,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:03,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:22:03,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:03,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:03,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:03,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:03,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:03,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:03,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:22:03,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:03,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 09:22:03,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:03,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:03,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:22:03,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:03,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:22:03,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:03,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 09:22:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:03,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:03,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:22:03,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:03,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:22:03,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:03,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:22:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:22:03,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:22:03,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553305100] [2020-10-29 09:22:03,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:22:03,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-29 09:22:03,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138701253] [2020-10-29 09:22:03,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:22:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:22:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:22:03,317 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 11 states. [2020-10-29 09:22:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:03,670 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-29 09:22:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:22:03,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-29 09:22:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:03,672 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:22:03,672 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:22:03,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:22:03,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:22:03,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 09:22:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:22:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-29 09:22:03,688 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 33 [2020-10-29 09:22:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:03,688 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-29 09:22:03,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:22:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-29 09:22:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:22:03,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:03,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:03,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:22:03,690 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:03,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:03,691 INFO L82 PathProgramCache]: Analyzing trace with hash -136319988, now seen corresponding path program 1 times [2020-10-29 09:22:03,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:03,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503032994] [2020-10-29 09:22:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:03,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:03,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:04,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:04,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:22:04,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:04,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-29 09:22:04,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:04,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:04,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:22:04,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:22:04,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:22:04,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:04,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:04,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:04,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:04,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:04,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:22:04,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:04,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:04,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:04,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:04,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:04,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:22:04,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:04,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:04,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:22:04,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:04,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-29 09:22:04,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:04,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:04,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:22:04,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:04,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:22:04,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:04,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 09:22:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:04,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:04,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:04,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-29 09:22:04,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:04,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:22:04,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:04,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:22:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:22:04,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:04,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503032994] [2020-10-29 09:22:04,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:04,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:22:04,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411302800] [2020-10-29 09:22:04,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:22:04,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:04,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:22:04,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:22:04,571 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 13 states. [2020-10-29 09:22:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:05,120 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-29 09:22:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:22:05,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-29 09:22:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:05,123 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:22:05,125 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:22:05,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:22:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:22:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-29 09:22:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:22:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-29 09:22:05,140 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2020-10-29 09:22:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:05,141 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-29 09:22:05,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:22:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-29 09:22:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:22:05,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:05,146 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, 1, 1, 1] [2020-10-29 09:22:05,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:22:05,150 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:05,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1209788453, now seen corresponding path program 2 times [2020-10-29 09:22:05,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:05,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250016552] [2020-10-29 09:22:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:05,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:05,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:05,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:05,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:22:05,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:05,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-29 09:22:05,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:05,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:05,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:22:05,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:05,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:05,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:05,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:05,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:05,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:05,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:22:05,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:05,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:05,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:05,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:05,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:05,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:05,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:05,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:05,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:05,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:05,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:22:05,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:05,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-29 09:22:05,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:05,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:22:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:22:05,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:05,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 09:22:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:05,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:05,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:05,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 09:22:05,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:05,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 09:22:05,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:05,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:05,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:05,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:05,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:22:05,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 09:22:05,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250016552] [2020-10-29 09:22:05,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:05,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:22:05,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469312860] [2020-10-29 09:22:05,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:22:05,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:05,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:22:05,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:22:05,834 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 10 states. [2020-10-29 09:22:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:06,293 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-29 09:22:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:22:06,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-29 09:22:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:06,295 INFO L225 Difference]: With dead ends: 67 [2020-10-29 09:22:06,295 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:22:06,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:22:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:22:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-29 09:22:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:22:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-29 09:22:06,310 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 35 [2020-10-29 09:22:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:06,310 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-29 09:22:06,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:22:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-29 09:22:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:22:06,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:06,312 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:06,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:22:06,313 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash -127572500, now seen corresponding path program 3 times [2020-10-29 09:22:06,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:06,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215490047] [2020-10-29 09:22:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:06,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:06,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:06,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:22:06,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:06,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-29 09:22:06,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:06,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:06,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:22:06,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:22:06,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:22:06,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:07,110 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-10-29 09:22:07,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:07,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:07,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:07,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:07,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:07,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:22:07,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:07,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:07,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:07,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:07,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:07,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:07,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:07,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:07,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:07,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:22:07,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:07,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-29 09:22:07,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:07,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:07,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:22:07,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:07,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:22:07,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:07,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 09:22:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:07,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:07,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:07,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:22:07,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:07,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 09:22:07,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:07,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:07,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:07,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:07,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:22:07,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:07,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215490047] [2020-10-29 09:22:07,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:07,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:22:07,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158840485] [2020-10-29 09:22:07,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:22:07,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:07,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:22:07,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:22:07,993 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 15 states. [2020-10-29 09:22:08,948 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-29 09:22:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:09,145 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-10-29 09:22:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:22:09,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-29 09:22:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:09,149 INFO L225 Difference]: With dead ends: 77 [2020-10-29 09:22:09,149 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:22:09,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:22:09,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:22:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-29 09:22:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 09:22:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2020-10-29 09:22:09,182 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 36 [2020-10-29 09:22:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:09,183 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-10-29 09:22:09,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:22:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2020-10-29 09:22:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:22:09,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:09,185 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:09,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:22:09,188 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:09,188 INFO L82 PathProgramCache]: Analyzing trace with hash -938616325, now seen corresponding path program 4 times [2020-10-29 09:22:09,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:09,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163879761] [2020-10-29 09:22:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:09,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:09,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:09,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:09,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:22:09,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:09,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-29 09:22:09,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:09,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:22:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:22:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:22:09,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:10,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:10,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:10,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:10,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:10,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:10,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:22:10,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:10,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:10,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:10,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:10,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:10,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:10,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:22:10,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:10,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-29 09:22:10,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:10,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:10,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:22:10,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:10,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:22:10,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:10,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 09:22:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:10,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:10,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:10,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 09:22:10,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:10,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 09:22:10,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:10,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:22:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:22:10,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:10,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163879761] [2020-10-29 09:22:10,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:10,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:22:10,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786296808] [2020-10-29 09:22:10,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:22:10,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:22:10,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:22:10,887 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand 16 states. [2020-10-29 09:22:11,948 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-29 09:22:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:12,175 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2020-10-29 09:22:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:22:12,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-29 09:22:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:12,178 INFO L225 Difference]: With dead ends: 81 [2020-10-29 09:22:12,178 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:22:12,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:22:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:22:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-10-29 09:22:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:22:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-29 09:22:12,195 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 37 [2020-10-29 09:22:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:12,196 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-29 09:22:12,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:22:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-29 09:22:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:22:12,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:12,197 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:12,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:22:12,198 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:12,198 INFO L82 PathProgramCache]: Analyzing trace with hash -311171124, now seen corresponding path program 5 times [2020-10-29 09:22:12,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:12,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217793981] [2020-10-29 09:22:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:12,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:12,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:12,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:12,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:22:12,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:12,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-29 09:22:12,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:12,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:22:12,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:22:12,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:22:12,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:12,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:12,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:12,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:12,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:12,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:12,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:22:12,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:12,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:12,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:12,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:12,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:12,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:12,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:13,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:13,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:13,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:22:13,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:13,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-29 09:22:13,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:13,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:13,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:22:13,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:13,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:22:13,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:13,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 09:22:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:13,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:13,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:13,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:22:13,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:13,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 09:22:13,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:13,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:22:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:22:13,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:22:13,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217793981] [2020-10-29 09:22:13,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:13,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:22:13,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722607340] [2020-10-29 09:22:13,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:22:13,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:13,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:22:13,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:22:13,335 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 16 states. [2020-10-29 09:22:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:14,160 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-10-29 09:22:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:22:14,161 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-29 09:22:14,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:14,165 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:22:14,165 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:22:14,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:22:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:22:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2020-10-29 09:22:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:22:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-10-29 09:22:14,179 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 38 [2020-10-29 09:22:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:14,179 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-10-29 09:22:14,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:22:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-10-29 09:22:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:22:14,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:14,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:14,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:22:14,181 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash -81463420, now seen corresponding path program 1 times [2020-10-29 09:22:14,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:14,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872627397] [2020-10-29 09:22:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:14,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:14,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:14,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:14,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:22:14,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:14,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-29 09:22:14,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:14,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:22:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:22:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:22:14,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:14,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:14,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:14,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:14,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:14,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:22:14,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:14,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:14,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:14,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:14,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:14,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:14,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-29 09:22:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:14,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:14,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:14,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:22:14,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:14,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-29 09:22:14,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:14,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:14,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:14,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:14,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:22:14,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:14,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 09:22:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:14,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:14,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:14,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 09:22:14,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:14,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 09:22:14,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:14,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:14,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:14,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:14,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:22:14,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:22:15,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872627397] [2020-10-29 09:22:15,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:15,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:22:15,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484045917] [2020-10-29 09:22:15,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:22:15,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:15,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:22:15,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:22:15,083 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 15 states. [2020-10-29 09:22:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:15,836 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-29 09:22:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:22:15,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-29 09:22:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:15,839 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:22:15,839 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:22:15,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:22:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:22:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2020-10-29 09:22:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 09:22:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-29 09:22:15,851 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 38 [2020-10-29 09:22:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:15,852 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-29 09:22:15,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:22:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-29 09:22:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:22:15,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:15,853 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:15,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:22:15,853 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:15,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1150577108, now seen corresponding path program 1 times [2020-10-29 09:22:15,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:15,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287211656] [2020-10-29 09:22:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:15,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:15,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:15,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:16,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:16,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:16,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:16,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:16,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:22:16,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:22:16,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-29 09:22:16,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:16,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:22:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:22:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:22:16,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:16,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:16,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:16,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:16,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:16,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:16,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:16,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:16,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:16,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:16,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:16,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:16,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:16,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:16,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:16,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:16,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:22:16,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:16,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-29 09:22:16,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:16,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:16,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:22:16,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:16,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:22:16,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:17,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 09:22:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:17,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:17,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:17,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:22:17,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:17,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 09:22:17,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:17,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:22:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:22:17,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:17,235 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 09:22:17,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287211656] [2020-10-29 09:22:17,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:17,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:22:17,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551685861] [2020-10-29 09:22:17,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:22:17,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:17,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:22:17,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:22:17,239 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 17 states. [2020-10-29 09:22:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:18,082 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-10-29 09:22:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:22:18,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-29 09:22:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:18,085 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:22:18,085 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:22:18,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:22:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:22:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-10-29 09:22:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:22:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2020-10-29 09:22:18,099 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 39 [2020-10-29 09:22:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:18,099 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2020-10-29 09:22:18,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:22:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2020-10-29 09:22:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:22:18,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:18,100 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:18,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:22:18,101 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:18,101 INFO L82 PathProgramCache]: Analyzing trace with hash 29315859, now seen corresponding path program 2 times [2020-10-29 09:22:18,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:18,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618658258] [2020-10-29 09:22:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:18,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:18,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:18,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:18,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:19,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:22,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:22,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:22:22,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:22:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4382 [2020-10-29 09:22:22,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:22,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:22:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:22:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:22:22,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:22,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:22,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:22,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:22,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:22,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:22,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:22:22,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:22,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:22,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:22,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:22,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:22,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:22,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:22,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:22,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:22,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:22:22,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:22,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-29 09:22:22,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:22,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:22,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:22,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:22,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:22:22,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:22:22,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 09:22:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:22,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:22,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:22,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 09:22:22,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:22,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:22:22,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:22,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:22,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:22,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:22,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:22,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 09:22:22,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618658258] [2020-10-29 09:22:22,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:22,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:22:22,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611259422] [2020-10-29 09:22:22,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:22:22,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:22,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:22:22,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:22:22,766 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 11 states. [2020-10-29 09:22:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:23,193 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-10-29 09:22:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:22:23,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-29 09:22:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:23,196 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:22:23,196 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 09:22:23,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:22:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 09:22:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2020-10-29 09:22:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:22:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2020-10-29 09:22:23,215 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 40 [2020-10-29 09:22:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:23,215 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2020-10-29 09:22:23,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:22:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2020-10-29 09:22:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:22:23,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:23,217 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:23,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:22:23,217 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:23,218 INFO L82 PathProgramCache]: Analyzing trace with hash 101702417, now seen corresponding path program 6 times [2020-10-29 09:22:23,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:23,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258140397] [2020-10-29 09:22:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:23,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:23,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:23,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:24,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:24,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:22:24,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:22:24,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1278 [2020-10-29 09:22:24,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:24,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:24,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:22:24,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:22:24,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:22:24,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:24,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:24,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:24,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:24,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:24,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:24,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:24,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:24,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:24,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:24,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:24,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:24,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:24,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:24,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:24,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:24,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:22:24,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:24,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-29 09:22:24,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:24,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:24,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:24,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:24,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:22:24,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:25,428 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-29 09:22:25,717 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-29 09:22:25,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 09:22:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:25,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:25,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:25,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 09:22:25,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:25,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 09:22:25,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:25,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:22:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:22:25,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:26,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258140397] [2020-10-29 09:22:26,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:26,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:22:26,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962844825] [2020-10-29 09:22:26,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:22:26,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:26,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:22:26,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:22:26,173 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand 17 states. [2020-10-29 09:22:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:27,474 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2020-10-29 09:22:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:22:27,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-29 09:22:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:27,477 INFO L225 Difference]: With dead ends: 106 [2020-10-29 09:22:27,477 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 09:22:27,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:22:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 09:22:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-10-29 09:22:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 09:22:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2020-10-29 09:22:27,494 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 40 [2020-10-29 09:22:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:27,495 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2020-10-29 09:22:27,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:22:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2020-10-29 09:22:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:22:27,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:27,496 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:27,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:22:27,496 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1873938806, now seen corresponding path program 7 times [2020-10-29 09:22:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:27,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155638528] [2020-10-29 09:22:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:27,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:27,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:27,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:29,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:29,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:22:29,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:22:29,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2168 [2020-10-29 09:22:29,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:29,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:29,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:22:29,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:22:29,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:22:29,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:29,973 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-29 09:22:30,217 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-29 09:22:30,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:30,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:30,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:30,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:30,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:30,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:22:30,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:30,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:30,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:30,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:30,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:30,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:30,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:22:30,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:30,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-29 09:22:30,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:30,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:30,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:30,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:30,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:22:30,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:30,812 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-29 09:22:31,053 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-29 09:22:31,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 09:22:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:31,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:31,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:22:31,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:31,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-29 09:22:31,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:31,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:31,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:22:31,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:31,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:22:31,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:31,467 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-29 09:22:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:22:31,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155638528] [2020-10-29 09:22:31,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:31,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:22:31,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322580189] [2020-10-29 09:22:31,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:22:31,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:31,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:22:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:22:31,874 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 18 states. [2020-10-29 09:22:33,346 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-29 09:22:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:33,654 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-10-29 09:22:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:22:33,656 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-29 09:22:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:33,657 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:22:33,657 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:22:33,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:22:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:22:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-10-29 09:22:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:22:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2020-10-29 09:22:33,676 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 41 [2020-10-29 09:22:33,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:33,677 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2020-10-29 09:22:33,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:22:33,677 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2020-10-29 09:22:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:22:33,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:33,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:33,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:22:33,678 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:33,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:33,679 INFO L82 PathProgramCache]: Analyzing trace with hash -907347416, now seen corresponding path program 2 times [2020-10-29 09:22:33,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:33,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428881733] [2020-10-29 09:22:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:33,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:33,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:34,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:34,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:22:34,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:34,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-29 09:22:34,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:34,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:22:34,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:22:34,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:22:34,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:34,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:34,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:34,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:34,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:34,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:34,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:22:34,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:34,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:34,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:34,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:34,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:34,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:34,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-29 09:22:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:34,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:34,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:34,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:22:34,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:34,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-29 09:22:34,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:34,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:34,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:34,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:22:34,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:34,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-29 09:22:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:34,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:34,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:34,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 09:22:34,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:34,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 09:22:34,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:34,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:34,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:22:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:22:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:22:34,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428881733] [2020-10-29 09:22:34,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:34,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:22:34,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709880304] [2020-10-29 09:22:34,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:22:34,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:22:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:22:34,683 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand 15 states. [2020-10-29 09:22:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:35,503 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2020-10-29 09:22:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:22:35,504 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-29 09:22:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:35,505 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:22:35,505 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:22:35,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:22:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:22:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-29 09:22:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:22:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-10-29 09:22:35,519 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 41 [2020-10-29 09:22:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:35,520 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-10-29 09:22:35,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:22:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-10-29 09:22:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:22:35,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:35,521 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:35,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:22:35,521 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:35,522 INFO L82 PathProgramCache]: Analyzing trace with hash -949256914, now seen corresponding path program 3 times [2020-10-29 09:22:35,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:35,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85314279] [2020-10-29 09:22:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:35,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:35,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:35,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:35,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:36,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:36,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:40,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:40,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:22:40,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:22:40,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:22:40,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:40,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:40,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:40,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:40,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:22:40,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:40,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:40,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:40,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:40,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:40,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:40,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:40,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:40,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:40,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:40,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:40,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:40,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:40,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-29 09:22:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:40,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:40,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:40,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:22:40,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:40,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-29 09:22:40,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:40,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:22:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:22:40,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:40,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-29 09:22:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:40,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:40,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:40,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:22:40,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:40,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:22:40,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:40,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:40,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:40,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-29 09:22:40,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:40,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:22:40,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85314279] [2020-10-29 09:22:40,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:40,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:22:40,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727339020] [2020-10-29 09:22:40,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:22:40,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:40,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:22:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:22:40,766 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 9 states. [2020-10-29 09:22:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:41,085 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-10-29 09:22:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:22:41,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-29 09:22:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:41,086 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:22:41,086 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:22:41,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:22:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:22:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-29 09:22:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:22:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-10-29 09:22:41,098 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 42 [2020-10-29 09:22:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:41,098 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-10-29 09:22:41,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:22:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-10-29 09:22:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:22:41,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:41,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:41,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:22:41,099 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:41,100 INFO L82 PathProgramCache]: Analyzing trace with hash -661809501, now seen corresponding path program 1 times [2020-10-29 09:22:41,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:41,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023994329] [2020-10-29 09:22:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:41,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:41,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:41,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:41,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:41,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:42,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:43,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:43,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:43,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:46,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:46,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:22:46,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:22:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:22:46,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:46,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:22:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:22:46,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:22:46,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:46,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:46,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:46,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:46,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:46,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:46,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:22:46,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:46,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:46,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:46,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:46,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:46,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:46,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-29 09:22:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:46,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:46,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:46,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:46,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:22:46,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:46,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-29 09:22:46,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:46,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:22:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:22:46,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:46,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 09:22:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:46,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:46,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:46,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:22:46,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:46,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:22:46,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:46,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:46,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:22:46,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:46,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:22:46,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 09:22:46,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023994329] [2020-10-29 09:22:46,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:46,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:22:46,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350536818] [2020-10-29 09:22:46,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:22:46,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:22:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:22:46,434 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 12 states. [2020-10-29 09:22:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:47,085 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-29 09:22:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:22:47,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-29 09:22:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:47,087 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:22:47,088 INFO L226 Difference]: Without dead ends: 80 [2020-10-29 09:22:47,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:22:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-29 09:22:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2020-10-29 09:22:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:22:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-10-29 09:22:47,112 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 45 [2020-10-29 09:22:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:47,112 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-10-29 09:22:47,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:22:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-10-29 09:22:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:22:47,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:47,113 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:47,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:22:47,114 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:47,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1999468568, now seen corresponding path program 3 times [2020-10-29 09:22:47,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:47,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266920007] [2020-10-29 09:22:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:47,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:47,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:48,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:48,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:22:48,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:48,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1207 [2020-10-29 09:22:48,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:48,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:48,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:22:48,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:22:48,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:22:48,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:48,925 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 73 [2020-10-29 09:22:49,472 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 81 [2020-10-29 09:22:49,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:49,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:49,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:49,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:49,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:22:49,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:49,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:49,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:49,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:49,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:49,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:49,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-29 09:22:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:49,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:49,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:49,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:22:49,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:49,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-29 09:22:49,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:49,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:22:49,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:50,260 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-29 09:22:50,628 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-29 09:22:50,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-29 09:22:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:50,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:50,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:50,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:22:50,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:50,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 09:22:50,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:50,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:50,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:22:50,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:50,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:22:50,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:51,281 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-29 09:22:51,496 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-29 09:22:51,688 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-29 09:22:51,871 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-29 09:22:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:22:51,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266920007] [2020-10-29 09:22:51,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:51,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:22:51,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388320666] [2020-10-29 09:22:51,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:22:51,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:51,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:22:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:22:51,895 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 19 states. [2020-10-29 09:22:52,510 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-29 09:22:53,723 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-29 09:22:54,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:54,002 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2020-10-29 09:22:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:22:54,004 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-29 09:22:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:54,005 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:22:54,006 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:22:54,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:22:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:22:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-29 09:22:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:22:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-10-29 09:22:54,021 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 45 [2020-10-29 09:22:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:54,022 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-10-29 09:22:54,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:22:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-10-29 09:22:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:22:54,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:54,023 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:54,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:22:54,023 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:54,029 INFO L82 PathProgramCache]: Analyzing trace with hash -320094172, now seen corresponding path program 2 times [2020-10-29 09:22:54,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:54,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130413252] [2020-10-29 09:22:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:54,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:54,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:54,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:54,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:54,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:54,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:54,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:56,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:56,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:22:56,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:22:56,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2353 [2020-10-29 09:22:56,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:56,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:56,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:22:56,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:22:56,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:22:56,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:56,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:56,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:56,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:56,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:56,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:56,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:22:56,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:56,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:56,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:56,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:56,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:56,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:56,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-29 09:22:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:56,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:56,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:56,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:22:56,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:56,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-29 09:22:56,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:56,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:22:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:22:56,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:56,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 09:22:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:56,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:56,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:56,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 09:22:56,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:56,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 09:22:56,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:56,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:22:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:22:56,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:22:56,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130413252] [2020-10-29 09:22:56,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:56,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:22:56,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732485179] [2020-10-29 09:22:56,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:22:56,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:56,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:22:56,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:22:56,881 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 19 states. [2020-10-29 09:22:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:22:57,933 INFO L93 Difference]: Finished difference Result 98 states and 131 transitions. [2020-10-29 09:22:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:22:57,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-29 09:22:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:22:57,936 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:22:57,936 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 09:22:57,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:22:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 09:22:57,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-10-29 09:22:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:22:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2020-10-29 09:22:57,955 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 46 [2020-10-29 09:22:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:22:57,956 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2020-10-29 09:22:57,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:22:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2020-10-29 09:22:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:22:57,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:22:57,958 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:22:57,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:22:57,958 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:22:57,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:22:57,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1162147711, now seen corresponding path program 4 times [2020-10-29 09:22:57,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:22:57,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894997854] [2020-10-29 09:22:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:22:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:57,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:58,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:58,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:58,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:22:58,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:22:58,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-29 09:22:58,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:58,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:22:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:22:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:22:58,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:58,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:22:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:58,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:58,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:58,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:22:58,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:58,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:22:58,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:58,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:22:58,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:58,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:22:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:58,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-29 09:22:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:59,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:59,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:59,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:22:59,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-29 09:22:59,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:59,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:22:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:22:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:22:59,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:59,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-29 09:22:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:22:59,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:22:59,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:22:59,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-29 09:22:59,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:22:59,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 09:22:59,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:22:59,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:22:59,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:22:59,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:22:59,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:22:59,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:22:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:22:59,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894997854] [2020-10-29 09:22:59,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:22:59,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:22:59,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914894700] [2020-10-29 09:22:59,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:22:59,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:22:59,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:22:59,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:22:59,573 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand 19 states. [2020-10-29 09:23:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:00,847 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2020-10-29 09:23:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:23:00,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-29 09:23:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:00,854 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:23:00,854 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:23:00,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:23:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:23:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2020-10-29 09:23:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:23:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2020-10-29 09:23:00,871 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 46 [2020-10-29 09:23:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:00,871 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2020-10-29 09:23:00,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:23:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2020-10-29 09:23:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:23:00,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:00,872 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:00,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:23:00,872 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1683146435, now seen corresponding path program 3 times [2020-10-29 09:23:00,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:00,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831864820] [2020-10-29 09:23:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:00,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:00,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:00,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:00,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:00,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:01,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:03,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:03,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:03,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:05,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:05,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:23:05,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:23:05,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:23:05,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:05,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:05,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:23:05,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:23:05,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:05,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:05,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:05,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:05,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:05,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:05,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:05,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:05,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:05,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:05,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-29 09:23:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:05,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:06,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:06,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:23:06,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:06,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-29 09:23:06,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:06,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:23:06,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:23:06,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:23:06,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:23:06,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 09:23:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:06,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:06,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:06,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:23:06,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:06,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:23:06,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:06,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:06,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:23:06,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:06,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:23:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:23:06,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831864820] [2020-10-29 09:23:06,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:06,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:23:06,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263431522] [2020-10-29 09:23:06,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:23:06,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:06,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:23:06,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:23:06,142 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 11 states. [2020-10-29 09:23:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:06,594 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-10-29 09:23:06,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:23:06,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-29 09:23:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:06,599 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:23:06,600 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:23:06,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:23:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:23:06,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-29 09:23:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:23:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-29 09:23:06,618 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 47 [2020-10-29 09:23:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:06,618 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-29 09:23:06,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:23:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-29 09:23:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:23:06,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:06,619 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:06,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:23:06,619 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:06,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1480717042, now seen corresponding path program 4 times [2020-10-29 09:23:06,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:06,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890824186] [2020-10-29 09:23:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:06,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:06,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:06,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:06,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:06,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:07,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:07,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:07,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:08,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:08,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:11,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:11,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:23:11,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:23:11,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:23:11,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:11,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:11,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:23:11,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:23:11,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:23:11,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:11,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:11,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:11,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:11,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:11,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:23:11,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:11,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:11,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:11,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:11,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:11,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:11,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:23:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:11,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:11,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:11,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:23:11,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:11,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-29 09:23:11,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:11,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:11,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:23:11,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:23:11,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:23:11,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:11,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 09:23:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:11,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:11,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:11,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:23:11,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:11,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:23:11,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:11,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-29 09:23:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:11,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 09:23:11,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890824186] [2020-10-29 09:23:11,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:11,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:23:11,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986535422] [2020-10-29 09:23:11,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:23:11,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:11,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:23:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:23:11,899 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 12 states. [2020-10-29 09:23:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:12,298 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2020-10-29 09:23:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:23:12,298 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 09:23:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:12,299 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:23:12,299 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:23:12,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:23:12,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:23:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2020-10-29 09:23:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:23:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-10-29 09:23:12,316 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 48 [2020-10-29 09:23:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:12,316 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-10-29 09:23:12,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:23:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-10-29 09:23:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:23:12,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:12,317 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:12,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:23:12,317 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash -30998964, now seen corresponding path program 5 times [2020-10-29 09:23:12,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:12,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923881807] [2020-10-29 09:23:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:12,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:12,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:12,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:12,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:23:12,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:23:12,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-29 09:23:12,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:12,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:12,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:23:12,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 09:23:12,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:23:12,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:13,013 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-29 09:23:13,213 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-29 09:23:13,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:13,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:13,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:13,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:13,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:13,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:13,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:13,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:13,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:13,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:13,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:23:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:13,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:13,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:13,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:23:13,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:13,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-29 09:23:13,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:13,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:13,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:23:13,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:13,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:23:13,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:13,627 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-29 09:23:13,767 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-29 09:23:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 09:23:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:13,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:13,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:13,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:23:13,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:13,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 09:23:13,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:13,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:23:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:23:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:23:13,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:14,204 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-10-29 09:23:14,539 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-29 09:23:14,698 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2020-10-29 09:23:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:23:14,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923881807] [2020-10-29 09:23:14,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:14,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:23:14,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564773239] [2020-10-29 09:23:14,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:23:14,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:14,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:23:14,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:23:14,713 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 17 states. [2020-10-29 09:23:15,377 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-29 09:23:15,854 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-29 09:23:16,095 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-10-29 09:23:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:16,227 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-29 09:23:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:23:16,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-29 09:23:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:16,228 INFO L225 Difference]: With dead ends: 79 [2020-10-29 09:23:16,228 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:23:16,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:23:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:23:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-29 09:23:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:23:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-29 09:23:16,247 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 48 [2020-10-29 09:23:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:16,247 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-29 09:23:16,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:23:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-29 09:23:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:23:16,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:16,248 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:16,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:23:16,249 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1993283540, now seen corresponding path program 6 times [2020-10-29 09:23:16,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:16,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439900895] [2020-10-29 09:23:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:16,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:16,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:16,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:16,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:23:16,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:23:16,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-29 09:23:16,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:16,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:23:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:23:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:23:16,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:22,498 WARN L193 SmtUtils]: Spent 5.02 s on a formula simplification. DAG size of input: 508 DAG size of output: 57 [2020-10-29 09:23:27,499 WARN L193 SmtUtils]: Spent 4.89 s on a formula simplification. DAG size of input: 508 DAG size of output: 58 [2020-10-29 09:23:27,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:27,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:27,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:27,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:27,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:27,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:27,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:27,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:27,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:27,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:27,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:27,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:27,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:23:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:27,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:27,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:27,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:23:27,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:27,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-29 09:23:27,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:27,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:27,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:23:27,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:27,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:23:27,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:28,140 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 28 [2020-10-29 09:23:28,811 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 58 [2020-10-29 09:23:29,431 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 64 [2020-10-29 09:23:30,055 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 65 [2020-10-29 09:23:30,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 09:23:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:30,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:30,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:30,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:23:30,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:30,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-29 09:23:30,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:30,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:30,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:23:30,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:23:30,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:23:30,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:30,637 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-29 09:23:30,952 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-29 09:23:31,312 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-29 09:23:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:23:31,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439900895] [2020-10-29 09:23:31,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:31,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:23:31,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104519639] [2020-10-29 09:23:31,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:23:31,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:31,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:23:31,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:23:31,340 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 19 states. [2020-10-29 09:23:32,485 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 125 [2020-10-29 09:23:33,349 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-29 09:23:33,755 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2020-10-29 09:23:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:34,016 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-29 09:23:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:23:34,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-10-29 09:23:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:34,018 INFO L225 Difference]: With dead ends: 85 [2020-10-29 09:23:34,018 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:23:34,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:23:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:23:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-10-29 09:23:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:23:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-29 09:23:34,029 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 50 [2020-10-29 09:23:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:34,029 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-29 09:23:34,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:23:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-29 09:23:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:23:34,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:34,030 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:34,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:23:34,031 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:34,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1353883579, now seen corresponding path program 7 times [2020-10-29 09:23:34,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:34,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437580533] [2020-10-29 09:23:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:34,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:34,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:35,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:35,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:23:35,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:23:35,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-29 09:23:35,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:35,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:23:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:23:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:23:35,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:38,354 WARN L193 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 379 DAG size of output: 81 [2020-10-29 09:23:41,253 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 379 DAG size of output: 67 [2020-10-29 09:23:41,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:41,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:41,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:41,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:41,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:41,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:41,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:41,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:41,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:41,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:41,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:41,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:41,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:23:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:41,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:41,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:41,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:23:41,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:41,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-29 09:23:41,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:41,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:23:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:23:41,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:42,143 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 24 [2020-10-29 09:23:43,879 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 486 DAG size of output: 71 [2020-10-29 09:23:45,571 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 294 DAG size of output: 49 [2020-10-29 09:23:47,238 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 294 DAG size of output: 53 [2020-10-29 09:23:47,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 09:23:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:47,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:23:47,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:47,949 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-29 09:23:48,243 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-29 09:23:48,468 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-29 09:23:48,651 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-29 09:23:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:23:48,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437580533] [2020-10-29 09:23:48,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:48,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:23:48,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119534996] [2020-10-29 09:23:48,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:23:48,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:48,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:23:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:23:48,679 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 20 states. [2020-10-29 09:23:49,395 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-29 09:23:50,757 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2020-10-29 09:23:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:51,078 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-10-29 09:23:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:23:51,079 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-29 09:23:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:51,081 INFO L225 Difference]: With dead ends: 89 [2020-10-29 09:23:51,081 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:23:51,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:23:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:23:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2020-10-29 09:23:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:23:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-10-29 09:23:51,093 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 51 [2020-10-29 09:23:51,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:51,093 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-10-29 09:23:51,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:23:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-10-29 09:23:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:23:51,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:51,094 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:51,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:23:51,095 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2090606899, now seen corresponding path program 5 times [2020-10-29 09:23:51,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:51,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191672918] [2020-10-29 09:23:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:51,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:51,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:51,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:51,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:51,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:51,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:51,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:51,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:52,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:52,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:56,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:56,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:23:56,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 09:23:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:23:56,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:56,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:23:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:23:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:23:56,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:56,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:23:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:56,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:56,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:56,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:23:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:56,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:56,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:56,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:23:56,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:56,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-29 09:23:56,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:56,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:23:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:23:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:23:56,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:56,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 09:23:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:56,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:56,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:56,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 09:23:56,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:23:56,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:23:56,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:56,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:56,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:23:56,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:23:56,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:23:56,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:23:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:23:56,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191672918] [2020-10-29 09:23:56,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:23:56,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:23:56,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106045338] [2020-10-29 09:23:56,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:23:56,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:23:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:23:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:23:56,356 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 13 states. [2020-10-29 09:23:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:23:56,827 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-10-29 09:23:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:23:56,828 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-29 09:23:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:23:56,829 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:23:56,829 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:23:56,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:23:56,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:23:56,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-10-29 09:23:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:23:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-10-29 09:23:56,844 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 52 [2020-10-29 09:23:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:23:56,844 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-10-29 09:23:56,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:23:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-10-29 09:23:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:23:56,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:23:56,845 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:23:56,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:23:56,845 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:23:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:23:56,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2036849164, now seen corresponding path program 8 times [2020-10-29 09:23:56,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:23:56,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96045285] [2020-10-29 09:23:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:23:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:23:56,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:57,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:23:58,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:23:58,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:23:58,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:23:58,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1677 [2020-10-29 09:23:58,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:23:58,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:23:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:23:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:23:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:23:58,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:00,842 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 373 DAG size of output: 61 [2020-10-29 09:24:02,974 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 373 DAG size of output: 58 [2020-10-29 09:24:03,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:03,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:03,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:03,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:24:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:03,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:03,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:03,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:24:03,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:03,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-29 09:24:03,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:03,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:03,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:03,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:03,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:24:03,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:03,970 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 26 [2020-10-29 09:24:05,932 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 338 DAG size of output: 42 [2020-10-29 09:24:07,715 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 265 DAG size of output: 57 [2020-10-29 09:24:09,536 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 265 DAG size of output: 56 [2020-10-29 09:24:09,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 09:24:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:09,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:09,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:09,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-29 09:24:09,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:09,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-29 09:24:09,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:09,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:09,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:09,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:24:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:24:09,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 17 [2020-10-29 09:24:10,109 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-29 09:24:10,390 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2020-10-29 09:24:10,652 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-29 09:24:10,992 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-29 09:24:11,346 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-29 09:24:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:24:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96045285] [2020-10-29 09:24:11,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:11,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:24:11,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042600929] [2020-10-29 09:24:11,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:24:11,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:11,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:24:11,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:24:11,374 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 21 states. [2020-10-29 09:24:12,136 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-29 09:24:13,414 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-29 09:24:13,882 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2020-10-29 09:24:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:14,241 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2020-10-29 09:24:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:24:14,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-29 09:24:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:14,243 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:24:14,243 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:24:14,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:24:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:24:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-10-29 09:24:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:24:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2020-10-29 09:24:14,258 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 52 [2020-10-29 09:24:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:14,258 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2020-10-29 09:24:14,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:24:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2020-10-29 09:24:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:24:14,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:14,259 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:14,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:24:14,259 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:14,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1500626063, now seen corresponding path program 9 times [2020-10-29 09:24:14,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:14,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597275191] [2020-10-29 09:24:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:14,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:14,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:14,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:16,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:19,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:19,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:24:19,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:24:19,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 09:24:19,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:19,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:19,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:19,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:19,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:24:19,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:19,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:19,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:19,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:19,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:19,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:19,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:24:19,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:19,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:19,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:19,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:24:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:19,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:19,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:19,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:24:19,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:19,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-29 09:24:19,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:19,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:24:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:24:19,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:19,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 09:24:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:19,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:19,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:19,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 09:24:19,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:19,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 09:24:19,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:19,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:19,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:24:19,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:19,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:24:19,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-29 09:24:19,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597275191] [2020-10-29 09:24:19,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:19,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:24:19,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892809812] [2020-10-29 09:24:19,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:24:19,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:19,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:24:19,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:24:19,625 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand 14 states. [2020-10-29 09:24:20,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:20,497 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2020-10-29 09:24:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:20,497 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-29 09:24:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:20,498 INFO L225 Difference]: With dead ends: 103 [2020-10-29 09:24:20,498 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:24:20,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:24:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:24:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2020-10-29 09:24:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 09:24:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2020-10-29 09:24:20,518 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 52 [2020-10-29 09:24:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:20,518 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2020-10-29 09:24:20,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:24:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2020-10-29 09:24:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:24:20,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:20,520 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:20,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:24:20,520 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:20,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:20,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1733945819, now seen corresponding path program 10 times [2020-10-29 09:24:20,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:20,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702108921] [2020-10-29 09:24:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:20,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:20,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:22,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:22,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:24:22,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:22,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1935 [2020-10-29 09:24:22,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:22,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:24:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:24:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:24:22,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:27,185 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 450 DAG size of output: 117 [2020-10-29 09:24:31,920 WARN L193 SmtUtils]: Spent 4.67 s on a formula simplification. DAG size of input: 450 DAG size of output: 116 [2020-10-29 09:24:31,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:31,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:31,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:31,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:31,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:24:31,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:31,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:31,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:31,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:31,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:31,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:31,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:24:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:32,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:32,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:32,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:24:32,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:32,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-29 09:24:32,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:32,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:24:32,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:32,598 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2020-10-29 09:24:33,463 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 61 [2020-10-29 09:24:35,463 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 247 DAG size of output: 93 [2020-10-29 09:24:37,495 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 247 DAG size of output: 92 [2020-10-29 09:24:37,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 09:24:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:37,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:37,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:37,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 09:24:37,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:37,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 09:24:37,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:37,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:24:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:24:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:24:37,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:38,343 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 43 [2020-10-29 09:24:38,668 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2020-10-29 09:24:39,049 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2020-10-29 09:24:39,437 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 60 [2020-10-29 09:24:39,761 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2020-10-29 09:24:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:24:39,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702108921] [2020-10-29 09:24:39,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:39,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:24:39,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767933427] [2020-10-29 09:24:39,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:24:39,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:39,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:24:39,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:24:39,801 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand 22 states. [2020-10-29 09:24:40,976 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 09:24:43,028 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2020-10-29 09:24:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:43,511 INFO L93 Difference]: Finished difference Result 111 states and 141 transitions. [2020-10-29 09:24:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:24:43,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-29 09:24:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:43,513 INFO L225 Difference]: With dead ends: 111 [2020-10-29 09:24:43,513 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:24:43,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:24:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:24:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-10-29 09:24:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:24:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2020-10-29 09:24:43,532 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 53 [2020-10-29 09:24:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:43,532 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2020-10-29 09:24:43,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:24:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2020-10-29 09:24:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:24:43,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:43,534 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:43,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:24:43,534 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:43,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:43,535 INFO L82 PathProgramCache]: Analyzing trace with hash -553603818, now seen corresponding path program 11 times [2020-10-29 09:24:43,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:43,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561284824] [2020-10-29 09:24:43,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:43,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:43,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:44,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:44,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:24:44,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:44,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 729 [2020-10-29 09:24:44,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:44,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:24:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:24:44,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:44,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:44,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:44,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:44,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:44,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:44,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:24:44,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:44,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:44,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:44,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:24:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:44,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:44,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:44,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:24:44,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:44,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-29 09:24:44,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:44,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:24:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:24:44,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:44,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 09:24:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:44,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:44,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:44,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:24:44,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:44,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:44,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:44,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:44,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:44,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:24:44,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:44,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:24:44,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561284824] [2020-10-29 09:24:44,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:44,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:24:44,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189730404] [2020-10-29 09:24:44,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:24:44,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:44,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:24:44,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:24:44,562 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 13 states. [2020-10-29 09:24:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:45,114 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2020-10-29 09:24:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:45,114 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-29 09:24:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:45,116 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:24:45,116 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 09:24:45,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:24:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 09:24:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-10-29 09:24:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 09:24:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-10-29 09:24:45,130 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 53 [2020-10-29 09:24:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:45,131 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-10-29 09:24:45,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:24:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-10-29 09:24:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:24:45,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:45,132 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:45,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:24:45,132 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:45,133 INFO L82 PathProgramCache]: Analyzing trace with hash 933876716, now seen corresponding path program 12 times [2020-10-29 09:24:45,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:45,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418650153] [2020-10-29 09:24:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:45,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:45,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:47,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:47,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:24:47,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:47,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1987 [2020-10-29 09:24:47,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:47,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:47,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:24:47,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:24:47,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:24:47,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:47,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:47,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:47,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:47,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:47,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:47,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:47,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:47,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:47,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:47,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:47,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:47,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:47,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:24:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:47,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:47,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:47,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:24:47,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:47,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-29 09:24:47,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:47,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:47,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:24:47,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:47,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:24:47,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:47,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 09:24:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:47,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:47,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:47,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-29 09:24:47,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:47,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 09:24:47,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:47,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:47,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:47,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:24:47,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:24:47,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-29 09:24:48,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418650153] [2020-10-29 09:24:48,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:48,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:24:48,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508542786] [2020-10-29 09:24:48,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:24:48,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:48,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:24:48,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:24:48,155 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 22 states. [2020-10-29 09:24:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:49,946 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-10-29 09:24:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:24:49,954 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-29 09:24:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:49,954 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:24:49,955 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:24:49,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:24:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:24:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-10-29 09:24:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:24:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-29 09:24:49,967 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 54 [2020-10-29 09:24:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:49,967 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-29 09:24:49,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:24:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-29 09:24:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:24:49,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:49,968 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:49,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:24:49,969 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash 597002984, now seen corresponding path program 13 times [2020-10-29 09:24:49,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:49,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384145813] [2020-10-29 09:24:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:50,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:50,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:50,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:24:50,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:50,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-29 09:24:50,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:50,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:50,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:24:50,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 09:24:50,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:24:50,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:51,888 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 54 [2020-10-29 09:24:52,849 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 53 [2020-10-29 09:24:52,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:52,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:52,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:52,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:52,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:52,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:24:52,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:52,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:52,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:52,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:52,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 09:24:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:52,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:53,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:53,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:24:53,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:53,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-29 09:24:53,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:53,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:24:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:24:53,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:53,440 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-29 09:24:53,880 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 24 [2020-10-29 09:24:54,637 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 32 [2020-10-29 09:24:55,329 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 53 [2020-10-29 09:24:55,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-29 09:24:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:55,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:55,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:55,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-29 09:24:55,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:55,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 09:24:55,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:55,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:55,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:55,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:24:55,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:24:55,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:55,817 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-29 09:24:55,973 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-29 09:24:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 09:24:56,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384145813] [2020-10-29 09:24:56,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:56,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:24:56,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926708800] [2020-10-29 09:24:56,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:24:56,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:56,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:24:56,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:24:56,133 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 19 states. [2020-10-29 09:24:57,025 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-10-29 09:24:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:57,913 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-10-29 09:24:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:24:57,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-10-29 09:24:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:57,915 INFO L225 Difference]: With dead ends: 83 [2020-10-29 09:24:57,915 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:24:57,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:24:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:24:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-29 09:24:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:24:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2020-10-29 09:24:57,929 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 55 [2020-10-29 09:24:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:57,929 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2020-10-29 09:24:57,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:24:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2020-10-29 09:24:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:24:57,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:57,930 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:57,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:24:57,931 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:57,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:57,931 INFO L82 PathProgramCache]: Analyzing trace with hash 48387199, now seen corresponding path program 14 times [2020-10-29 09:24:57,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:57,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331653077] [2020-10-29 09:24:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:57,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:57,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:59,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:59,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:24:59,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:59,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1228 [2020-10-29 09:24:59,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:59,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:24:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:24:59,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:59,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:59,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:59,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:59,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:59,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:59,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:24:59,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:59,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:59,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:59,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:59,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 09:24:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:59,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:59,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:59,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:24:59,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:59,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-29 09:24:59,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:59,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:24:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:24:59,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:59,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-29 09:24:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:59,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:59,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:59,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:24:59,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 09:24:59,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:59,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:24:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:24:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-29 09:24:59,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331653077] [2020-10-29 09:24:59,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:59,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:24:59,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041866719] [2020-10-29 09:24:59,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:24:59,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:59,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:24:59,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:59,570 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 16 states. [2020-10-29 09:25:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:00,615 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2020-10-29 09:25:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:25:00,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-10-29 09:25:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:00,617 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:25:00,617 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:25:00,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:25:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:25:00,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-10-29 09:25:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 09:25:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-29 09:25:00,633 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 56 [2020-10-29 09:25:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:00,633 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-29 09:25:00,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:25:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-29 09:25:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:25:00,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:00,634 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:00,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:25:00,635 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:00,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:00,635 INFO L82 PathProgramCache]: Analyzing trace with hash 221167048, now seen corresponding path program 15 times [2020-10-29 09:25:00,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:00,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082957394] [2020-10-29 09:25:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:00,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:01,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1358 [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:25:02,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0